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"off duty" 1970 - 1997 - eine Freizeit-Zeitung für's US-Militär

Die in diesem amerikanischen (Freizeit-) Shopping-Magazin angepriesenen Hifi- und Video-Produkte waren auschließlich amerikanischen und kanadischen Militärangehörigen zugänglich - also zu kaufen - und vor allem zu ganz ungewöhnlich (verblüffend) niedrigen US $ Military-Preisen. Zu der einführenden "off duty" Seite geht es hier lang. -  Um 1970 begann der weltweite Hifi-Boom bis zum 1. Crash 1978 und dann wieder zum 2.Crash um 1990. Über die 20 Jahre nach 2001 lesen Sie mehr in den Kolumnen auf diesen japanischen Seiten.

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Eine beängstigende Trendwende beim Hifi ist in Sichtweite

Nachdem der US-amerikanische Markt das Verwirrspiel um die 3 Quadro-Systeme satt hatte, suchten die Japaner dringendst einen Ausweg aus der Misere, die viel Geld verschlungen hatte und am Ende eine Negativ-Werbung zu werden drohte.

Neue dicke Monsterreceiver und ganz dicke Endstufen nach dem Vorbild weniger Amerikaner, jedoch optisch besser gestylt, sollten die Rettung bringen. Einen letzten Hoffnungslauf machten einige Japaner noch mit verbesserten Quadro-Zusatzgeräten, die aber auch nicht mehr den Anklang fanden. Aufgrund dieses Markteinbruchs haben auch die großen Platten-Labels quasi aufgehört, die Quadro Platten insgesamt zu forcieren. Die amerikanischen und deutschen Hifi-Magazine taten ein Übriges, um den Markt weiter zu verunsichern.

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A Little Something Special

Equipment to tickle the fancy of the audio connoisseur - By LARRY MYERS - Off Duty / Europe / January 1976
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Intro for : "TAKE A LOOK AT a real audio buffs ......"

TAKE A LOOK AT a real audio buffs hi-fi system and it's almost a sure bet that you'll find one or more special components. Separate pre and power amplifiers are the most common special components you are likely to encounter, but there are plenty of others available.

Noise reduction units, equalizers (often incorporated with a preamp), quadraphonic adapters, microphone mixers, switching units and reverbs also are in the "special" category. Regardless of their function, special components contribute to the fidelity and/or flexibility of an audio system.

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(1) Preamplifiers.

All preamps, whether part of a receiver, integrated amplifier or as a separate unit, serve to amplify the signal from a source such as a turntable or tape deck to a level sufficient to drive a power amplifier. However, separate preamps generally offer flexibility and performance superior to those integrated with other components.

For example, the preamps listed here usually offer inputs for a large number of sources, a full range of sophisticated controls, such as multiple tone controls with selectable turn-over points for greater ease in tailoring the sound to your liking, VU meters, as well as superior electrical specifications, especially as regards noise, distortion and frequency response.
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(2) Power amplifiers.

Like preamps, power amps may be incorporated in receivers or integrated amplifiers or may be separate units. The power amp's job is to boost the signal from the preamp to a level that will drive your speakers. The primary factor that distinguishes separate power amplifiers from those just mentioned is power, lots of it. While 100-watt per-channel receivers are available, if you are really shooting for big stuff, like 250 watts, you'll need a separate power amp.

Of course, power isn't the only thing these amps offer. Distortion and noise are usually quite low, frequency response wide, and the amount of reserve
power for musical peaks is substantial. Then, too, meters or other output indicators are also offered.
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(3) Equalizers.

Even the advanced tone controls on separate preamplifiers are not enough to suit some audiophiles. For them an equalizer, which divides the audio spectrum into five or more frequency bands (as opposed to the two or three on most preamps) is the ultimate. Equalizers are incorporated into some preamps, but they are also available separately, and can be connected between your preamp and power amp, or even used with many receivers.

Describing an equalizer as a special kind of tone control may be a bit misleading. Rather than using equalizers for making gross changes in overall response, many audiophiles use them for subtle refinements in order to get a uniform or "flat" frequency response, given the characteristics of their system and room. Once the equalizer is adjusted in this way, the preamp's tone controls can be used to make temporary changes. For example, if a particular record has overly-strong high-frequency emphasis, the preamp can be adjusted to compensate for it without permanently altering the system's overall response.
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(4) Noise Reduction.

Short of sending the kids out to play, the B Type Dolby system is without a doubt the most popular noise reduction method around today. Often incorporated in cassette decks and open-reel recorders, Dolby is being used in more and more receivers and tuners of late, largely due to the increased use of Dolby by FM radio stations Stateside. You can, of course, add a separate ("outboard") Dolby unit to your present equipment instead of buying new Dolby-equipped components.

Separate Dolby units usually have easily adjustable calibration provisions, including built-in meters, which you won't find elsewhere. And, of course, you can use a separate Dolby unit with more than one piece of equipment, say a cassette deck, open-reel recorder and also a tuner. (Note that Dolbyized FM broadcasts use a different pre-emphasis than do regular FM broadcasts. Therefore, for proper reception you will need an inexpensive adapter that converts your tuner from the standard 75 to the 25 microsecond de-emphasis needed for best results.)

You will find two types of outboard Dolby units, those that offer separate recording and playback circuits and those that do not. The latter require you to do more plugging and unplugging of cables than the former, but the cost is less and the overall effect —less noise —is the same. There are other noise reduction systems on the market; JVC has built into their cassette decks their own ANRS system which is compatible to prerecorded Dolbyized tapes. Another is the dbx system which reduces noise and can expand dynamic range. There will soon be pre-recorded dbx records and tapes but the Dolby system remains the market leader for general audiophiles yearning for tapes and FM transmissions that are free of background hiss.
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(5) 4-channel adapters.

We've all heard a lot about 4-channel but many people, particularly those with a large investment in stereo gear, are hesitant to make the switch. However, these are a number of 4-channel adapters on the market that allow you to go quad with little additional investment.

The simplest, and cheapest, approach is the speaker matrix. These devices, which don't require additional amplifiers, recover out-of-phase rear channel information, present to some degree in all recordings. Next come matrix decoders for QS and SQ. Available in varying degrees of complexity, they provide true four-channel sound.

The more elaborate have sophisticated logic circuits and will synthesize reasonable 4-channel from stereo sources. And, there are also CD-4 demodulators for recovering the rear channel information on CD-4 discs. With the exception of the speaker matrix approach, you'll need rear channel amplifers, too, which are incorporated in some units. Of course, it should be obvious that you'll need four speakers, too.

And so on. There are a number of other special components available, including: reverberation systems that simulate the effect of being in a larger listening room; control centers, for switching various equipment inputs and outputs; special adjustable crossover systems, for use with bi or tri-amplified speaker systems; and, audio test units for checking and adjusting your system.

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Anmerkung zu den Produkten und den Firmen hier unten drunter :

Es sind nämlich bei weitem nicht alle Firmen verteten, die in den Audio-Clubs zu sehen und zu kaufen waren. (Der Wiesbadener Audio-Club in Mainz-Kastel war der größte in Europa ud hatte mindestens die dreifache Anzahl an Herstellern in der Präsentation.) - Diese Texte und auch die Bilder und deren Anzahl mußten als Werbung bezahlt werden. Das war in keiner Weise eine neutrale Marktübersicht, auch wenn es manche Sammler so darstellen wollen. Das Gleiche galt übrigens auch für die deutschen Hifi-Jahrbücher von Karl Breh, die über viele Jahre als die Hifi-Bibel(n) gehandelt wurden und heute noch mit diesem Mythos (bei ebay verkäufen) verknüpft werden.

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Accuphase

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  1. Accuphase C-200 - Stereo preamplifier. Frequency response 20-20k Hz (-0.5 dB). Harmonic distortion 0.05 per cent. Hum and noise -64dB (phono input). Selectableturnover points for bass and treble controls, high and low-frequency filters, defeatable subsonic filter, de-featable loudness circuit, three tape monitor circuits, isolated tape dubbing circuit, main/remote speaker selector. Front-panel headphone and tape recorder jacks. Size 171/2x6x14 in. Wt. 31 lbs. 110/220 volts, 50/60 Hz.
  2. Accuphase M-60 - Mono power amplifier. Power output 300 watts rms into 8 ohms with 0.1 per cent harmonic distortion, 20-20k Hz. Frequency response 20-90k Hz (-3 dB), IM distortion 0.1 per cent, hum and noise -100 dB. Step-type level control, defeatable subsonic filter, volume/peak meter, meter mode selector. Size 19x61/4x14 in. Wt. 591<2 lbs. 100/240 volts, 50/60 Hz.
  3. Accuphase P-250 - Stereo power amplifier. Power output 100 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion, 20/20k Hz, both channels driven. Frequency response 5-90k Hz, hum and noise-94dB, IM distortion 0.1 per cent. Input level controls, 3-posi-tion damping control, two output meters with sensitivity selector. Outputs and switches for three sets of stereo speakers. Headphone jack. Size 171;2x6x14 in. Wt. 43 lbs. 100/240 volts, 50/60 Hz.
  4. Accuphase P-300 - Stereo power amplifier. Power output 150 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 7^0k Hz (-0.2 dB) at 1 watt. Hum and noise-92 dB, IM distortion 0.1 per cent. Level controls, two VU meters with sensitivity selector, 3-position power limiter switch, outputs and switches for four sets of stereo speakers. Bandpass filter. Size 171/2x6x14 in. 110/220 volts, 50/60 Hz.

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Advent

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  • Advent Model 100A Noise Reduction Unit - Record/playback control center with Dolby B-type noise reduction system. Record section has line preamplifier and Dolby recording system with provision for plug-in microphone preamplifier. Playback section has Dolby playback system and line preamplifier. Controls for input level, record and playback levels. Built-in calibration oscillator and meters. Front-panel headphone jack. Dolby FM broadcast mode for use with FM tuners. Source-tape monitor switches. Defeatable multiplex filter. Harmonic distortion 0.5 per cent. Noise reduction 3 dB at 600 Hz, 10 dB above 4k Hz. Input impedance 50K ohms, output level 1.0 volt into 1K ohm. Size 13x5x8% in. Case optional.

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Advocate

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  • Advocate Model 101 Noise Reduction Unit - Tape recording control center with Dolby B-type noise reduction system. Has one stereo section which may be switched from record to playback mode. Record level controls for each channel. Built-in calibration meter and oscillator. Multiplex filter. Harmonic distortion 0.4 per cent, noise reduction 3 dB at 600 Hz, 10 dB above 4k Hz. Input impedance 50K ohms, output impedance 100 ohms. Size 123/4x7x2/2 in. Wt. 9 lbs. Wood end panels.

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Amcron

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  1. Amcron IC 150 - Stereo preamplifier console. Frequency response 3-100k Hz ±0.6 dB. Hum and noise -80 dB (phono, input). Harmonic distortion unmeasureable, IM distortion 0.01 per cent. Output voltage 2.5 volts into 600 ohms. Inputs 5 high level plus two equalized phono. High and low frequency filters. Defeatable loudness circuit. Continuously variable mono/stereo/stereo-reverse control. Size 51/4x1 7x8 in. Wt. 10 lbs. 11 0-220 volts.
  2. Amcron D-60 Power Amplifier -Stereo power amplifier. Power output 30 watts RMS per channel into 8 ohms (both channels operating). Frequency response 20-20k Hz ±0.1 dB at 30 watts. IM distortion 0.3 per cent. Hum and noise -100 dB. Load impedance 4-16 ohms. Front panel controls include individual channel volume controls and power switch. Front panel headphone jack. Size 1 9x1%x7% in. Wt. 8/2 lbs. 1 10-220 volts.
  3. Amcron D-150A - Stereo power amplifier. Power output 80 watts rms per channel into 8 ohms with 0.05 per cent harmonic distortion from 1-20k Hz, both channels driven. Frequency response DC-20k Hz (± 0.1 dB). IM distortion 0.05 per cent. Hum and noise -110 dB. Front-panel level controls. Stereo/mono switch. Size 17x51/4x9 in. Wt. 25 lbs. 120/240 volts, 50/400 Hz.
  4. Amcron DC-300A - Stereo power amplifier. Power output 150 watts rms per channel into 8 ohms with 0.05 per cent IM distortion, 0-20k Hz, both channels driven, frequency response 0-100k Hz (±1 dB at one watt). Hum and noise -100 dB. Front-panel controls include individual channel volume controls, power switch and dc-balance controls behind front panel. Output impedance 4-16 ohms. Size 19x7x9% in. Wt. 45 lbs. 110/220 volts ac, 50/60 Hz.
  5. Amcron OC-1 50 - Stereo output control unit. Includes outputs for three pairs of stereo speakers, two headphone jacks and two VU meters. VU meters read average signal levels and peaks. Peak readings may be held for variable duration (600 milliseconds to infinity). Variable meter sensitivity from 1.4 volts to 140 volts. Size 5/4x1 7x8/4 in. Wt. 1 0 lbs.
  6. Amcron VFX-2 - Stereo electronic filter/ crossover unit. Each channel containstwofilters continuously variable from 20-20k Hz. Filter rolloff 18 dB per octave. Frequency response 20-20kHz(±1 dB).IM distortion 0.01 percent, hum and noise -113 dB. Size 19x3/x53/4 in. Wt. 6 lbs. 1 10/220 voltsac,50/60Hz.

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Bose

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  1. Bose 1801 - Stereo power amplifier. Power output 250 watts rms per channel into 8 ohms, both channels driven. Two VU meters plus LED peak-level indicator, input selector, remote speaker output with selector, individual gain controls, LED-display/VU meter selector. Electronic overload-protection circuit, automatic start-delay circuit. Blackout front panel. Size 7/4x18x18/2 in. Wt. 82 lbs. 110/ 220 volts ac, 50/60 Hz.
  2. Bose 4401 - 4-channel pre-amplifier. Frequency response 20-20k Hz (±0.2 dB), harmonic distortion 0.2 per cent. Hum and noise -80 dB (aux. input). Inputs for optional SQ decoder and CD-4 demodulator. High and low frequency filters, two tape monitor circuits and front panel 4-channel headphone jacks. Size 6x18x13/4 in. Wt. 12 lbs. 110/220 volts ac, 50/60 Hz.
  3. Bose SQM-1-Full logic SQ decoder designed to fit Bose 4401 preamplifier. Logic and matrix circuitry. Mounts internally. Powered by preamplifier.

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Anmerkung : (+ Nachtrag aus 2024)

Diesen BOSE SQM-1 Decoder mit den 3 Motorola ICs hatte ich nie irgendwo gesehen. Auch auf ebay taucht er nach 40 Jahren nicht auf. Ob es den überhaupt jemals gegeben hatte ? Nachtrag aus 2024 - ja, diese Teile gab es in ganz kleinen Stückzahlen - mehr kommt auf der BOSE Seite.

Burwen

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  • Burwen DNF-1201 - Stereo dynamic noise reduction unit. Frequency response 10-20kHz (±0.5 dB). Harmonic distortion 0.2 per cent. Hiss reduction 6-14 dB, depending on program material and control settings. Single-pass system, does not require pre-encoding of program material. Size 1112x4x9 in.

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C/M Laboratories

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  1. CC-3 - Stereo preamplifier. Frequency response 5-20k Hz (± 0.1 dB). S/N ratio 100 dB, 80 dB (phono input). Harmonic distortion 0.05 per cent, IM distortion 0.02 per cent. Channel separation 70 dB at 1 k Hz. Defeatable loudness and tone controls, high and low-frequency filters, two tape monitor circuits. Front-panel headphone jack. Size 19x514x9 in. Wt. 12 lbs. 120 volt.
  2. CM-601 - Stereo electronic crossover unit. Seven slide switches provide total of 127 possible crossover frequencies from 100-12kHz. Frequency response 1-100kHz (-3 dB). Harmonic distortion 0.5 per cent, IM distortion 0.5 per cent. Size 21/2x11x51/4 in. Wt. 412 lbs. 120 volt, 60 Hz.
  3. CM-912 - Stereo power amplifier. Power output 130 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion from 20-20k Hz, both channels driven. Frequency response 1-100kHz (±0.5 dB). Hum and noise 100 dB. Thermostatically controlled cooling fan. Two peak-reading power output meters. Modular construction. Size 19x14x5/4 in. Wt. 46 lbs.

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dbx

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  1. dbx 117 - Stereo dynamic range expansion/ compression and noise reduction unit. Frequency response 20-20k Hz (-1 dB). Distortion 0.5 per cent at 20 Hz. Compression and expansion continuous from 1.4 compression slope (14 dB output change/20 dB input change) to 2.0 expansion slope (20 dB output change/1 OdB input change). Size 3%x5%x9 in. Wt. 4/2 lbs.
  2. dbx 119 - Same as dbx 117 except has continuous expansion and compression from constant output at varying input to 2.0 expansion slope; also has above threshold mode for expansion and compression above a preset peak level.
  3. dbx 122 - Same as dbx 117 except has constant 2:1 compression ratio for recording/ playback use as noise reduction unit and for decoding dbx discs.
  4. dbx 124 - Same as dbx 122 except has four channels for discrete quadraphonic recording or for monitoring stereo recording.

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Dynaco

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  1. Dynaco PAT-4 - Stereo preamplifier. Frequency response 10-100k Hz ±0.5 dB (High level input). Hum and noise -70 dB (phono input). Harmonic distortion 0.05 per cent, IM distortion 0.05 per cent. Gain 54 dB (phono input), 20 dB (aux input). High and low frequency filters. Defeatable loudness circuit. Front panel input and output jacks. Size 13/2x4/4x9 in. Wt. 10 lbs. 110-220 volts.
  2. Dynaco Stereo 80 - Stereo power amplifier. Output power 40 watts RMS per channel into 8 ohms with 0.5 per cent harmonic distortion at any frequency 20-20k Hz. Inter-modulation distortion 0.5 per cent. Hum and noise -90 dB. Input impedance 100k ohms. Size 14x8x4 in. Wt. 13 lbs. 110-220 volts. Kit or assembled.
  3. Dynaco Stereo 120 - Stereo power amplifier. Power output 60 watts RMS per channel into 8 ohms with 0.25 per cent harmonic distortion at any frequency 20-20k Hz. IHF power bandwidth 5-50k Hz. IM distortion 0.5 per cent. Hum and noise -95 dB (unweighted). Input impedance 100K ohms. Load impedance 4-16 ohms. Size 13x 1 0/2x4 in. Wt. 20 lbs. 11 0-220 volts. Kit or assembled.
  4. Dynaco Stereo 400 - Stereo power amplifier. Power output 200 watts RMS per channel into 8 ohms at any frequency with 0.25 per cent harmonic distortion. Frequency response 10-50k Hz +0, -1 dB 1 watt. High and low-frequency filters. 10-second turn-on delay circuit. Dynamic protection circuit with selectable power levels of 20, 40, 80, 120 and 200 watts RMS into 8 ohms. Fused speaker circuits. Switchable mono mode producing 600 watts RMS into 8 ohms. Size 16x12/2x7 in. Wt. lbs. Kit or assembled.
  5. Dynaco Stereo 400M/A - Same as Dynaco Stereo 400 except has two VU meters with variable sensitivity.
  6. Dynaco QD-1 - High-level passive 4-channel matrix decoder. Designed to be connected to output of stereo amplifier and four speakers to produce 4-channel sound from regular matrix material and derived 4-channel from stereo material. May be connected to amplifiers which have common stereo ground in chassis. Electrical null balance circuit, front-speakers only mode and rear channel volume control.
  7. Dynaco Stereo 410 - Similar to Dynaco Stereo 400 except lacks level controls, filters, relay, dynamic protection circuit. Built-in cooling fan.

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Epicure

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  • Epicure Model One - Stereo power amplifier. Power output 125 watts rms per channel into 8 ohms with 0.2 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 10-180k Hz (-3 dB), power bandwidth 10-52k Hz, IM distortion 0.2 per cent, S/N ratio 100 dB. Voltage, current and thermal overload indicators. Speaker selector switches, level controls, outputs for scope. Size 181/2x121/2x71/2 in. Wt. 58 lbs.

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ESS

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  • ESS Eclipse 500A - Stereo power amplifier. Power output 250 watts rms per channel into 8 ohms with 0.25 per cent harmonic distortion, 20-20k Hz, both channels driven. Hum and noise -102 dB. Level controls, two VU meters, meter sensitivity switch, speaker selector switch. Size 19x7x13 in. Wt. 49 lbs.

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Harman/Kardon

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  1. Harman/Kardon Citation Eleven - Stereo preamplifier-equalizer. Frequency response 5-125kHz ±0.5 dB. Harmonic distortion 0.05 per cent, IM distortion 0.05 per cent. Hum and noise-65 dB (phono input, unweighted). Four outputs, six inputs (2 phono), high and low frequency filters. Two front panel low impedance headphone jacks, speaker selector switches. Audio equalizer has five sliding controls which vary selected frequencies (60, 320, 1k, 5k and 12k Hz) ± 12 dB. Two tape monitor circuits. Size 16x43'4x12 in. Wt. 20 lbs. 110/220 volts.
  2. Harman/Kardon Citation Twelve - Stereo power amplifier. Power output 60 watts rms per channel into 8 ohms with 0.2 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 1—70k Hz (± 0.5 dB), power bandwidth 5-35k Hz, IM distortion 0.15 per cent, hum and noise-100 dB. Size 512x121'2x13 in. Wt. 30 lbs. 110/220 volts.
  3. Harman/Kardon Citation Twelve Deluxe - Same as Harman/Kardon Citation Twelve except has walnut case and chrome face-plate.
  4. Harman/Kardon Citation 16 - Stereo power amplifier. Poweroutput 150 watts rmsperchannel into8 ohms with 0.05 percent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 0.5-120kHz, power bandwidth 5-110k Hz. IM distortion 0.05 per cent, hum and noise-100 dB. May be used in mono mode to provide 320 watts rms into 16 ohms. Multi-color LED outputdisplay, display test control, display sensitivity control. Size 914x19x14 in. Wt. 55 lbs.
  5. Harman/Kardon 44+ - CD-4 4-channel demodulator. Add-on unitto be placed between turntable and amplifier to decode CD-4 material. Frequency response 20-10k Hz (±1.5 dB). S/N ratio 60 dB. Channel separation 20dB. Size 4%x1 2x5/4 in. Wt. 8 lbs.

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JVC

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  1. JVC SEA-10- Stereo equalizer. Frequency response 20-30k Hz. Harmonic distortion 0.1 per cent, hum and noise -70 dB. Input impedance 100k ohms. Five controls vary response ± 12 dB at peak frequencies (40 or 60, 250, 1 k, 5k, 10k or 15kHz). Controls equalize both channels concurrently. Tape monitor circuit. Size 514x71 2x10 in. Wt. 5 lbs.
  2. JVC SEA-V7E - 4-channel equalizer. Frequency response 20-20k Hz, harmonic distortion 0.02 per cent, S/N ratio 85 dB. Seven controls vary response ± 12dBatfrequenciesof40, 150, 400, 1 k, 2.4k, 6k and 15k Hz. Separate controls for each channel pair. Front-panel input and output jacks. Size 51/2x17x12 in. Wt. 20 lbs. 100/240 volts, 50/60 Hz.
  3. JVC 4DD-5 - CD-4 demodulator. Add-on unit to be placed between turntable and amplifier to decode CD-4 records. Frequency response 20-16k Hz. S/N ratio 60 dB. Size 31/2x7x123/4 in. Wt. 5 lbs.
  4. JVC NR-1020U - Stereo noise reduction unit. Utilizes JVC ANSR-type system to reduce noise incurred in tape recording. Frequency response 20-20k Hz (± 2 dB), harmonic distortion 0.5 per cent at 1k Hz. S/N ratio 60 dB at 1k Hz. Separation 55 dB. Calibration meters. S/N improvement 10 dB at 5k Hz. Size 33;4x131,4x712 in. Wt. 6 lbs. 110/220 volts, 50/60 Hz.

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Kenwood

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  1. Kenwood 700C - Stereo pre-amplifier. Frequency response 20-20k Hz (±0.3 dB), harmonic distortion 0.04 per cent, IM distortion 0.04 per cent, hum and noise -70 dB (phono input). Two phono inputs plus three high level auxiliary inputs. Low and sub-sonic frequency filters. High frequency filter with variable cutoff at 7 and 12 kHz. Two-stage loudness circuit, tape monitor circuits and front-panel headphone and microphone jacks. Size 1 71Ax5%x1 2 in. Wt. 25 lbs.
  2. Kenwood 700M - Stereo power amplifier. Power output 1 70 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 20-20k Hz (-0.4 dB). Power bandwidth 5-30k Hz. IM distortion 0.1 per cent, hum and noise -1 20 dB. Two VU meters with variable sensitivity. Outputs for three sets of stereo speakers. Individual front-panel gain controls. Size 1 7/4x8x1 5 in. Wt. 60 lbs.

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Lecson

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  1. Lecson AC1 -Stereo preamplifier. Frequency response 30-20k Hz(± 0.5 dB) Harmonic distortion 0.05 percent. S/N ratio (phono) 80 dB. Hum -70 dB. Slide controls select 5 inputs, volume, balance, treble, bass, mode, high and low frequency filters, headphones. Tape monitor circuit. Provisions for adding 4-channel adaptor, remote control. Low profile design, color-coded controls. Size 141/2x10x11/2 in. 110/260 volts ac, 50/60 Hz.
  2. Lecson AP1 - Stereo power amplifier. Power output 35 watts per channel into 4 or 8 ohms, with 0.05 percent harmonic distortion between 20-20kHz. Frequency response 10-20k Hz (± 0.5 dB) Noise -90 dB. Direct-coupled output. Electronic and thermal protection circuits. Housed in sealed column. Size 11x53M in. diameter. 110/220 volts ac, 50/60 Hz.
  3. Lecson AP3 - Similar to Lecson AP1 except power output 100 watts per channel. Size 14x534-in. diameter.

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Luxman

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  1. Luxman CL-350 - Stereo preamplifier. Frequency response 10-50kHz (-1 dB), S/N ratio 63 dB (phono input). Harmonic distortion 0.02 per cent. Bass, treble controls with selectable turnover points, balance control, two-step high and low-frequency filters, tape monitor circuits, headphone amplifier. Front-panel headphone jack.
  2. Luxman M-150 - Stereo power amplifier. Power output 75 watts rms per channel into 8 ohms, both channels driven. Frequency response 20-50k Hz (-0.1 dB), harmonic distortion 0.03 per cent. Power bandwidth 10-50k Hz (-3 dB). Defeatable subsonic filter, input selector, speaker selector switch, two peak-reading VU meters. Size 19x91/2x714 in. Wt. 34 lbs. 100/240 volts.
  3. Luxman M-6000 - Stereo power amplifier. Power output 300 watts rms per channel into 8 ohms with 0.05 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 5-50k Hz (± 1dB), S/N ratio 100 dB, IM distortion 0.05 per cent. Level controls, two VU meters, LED peak output display, meter/display sensitivity switch. Size 2212x17x9 in. Wt. 154 lbs.

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Marantz

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  1. Marantz 140 - Stereo power amplifier. Power output 75 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 10-50k Hz (± 2 dB). IM distortion 0.1 per cent. Front-panel level controls, two VU meters, peak output indicators. Size 5x14x11 in. Wt. 241/2 lbs.
  2. Marantz 250M - Stereo power amplifier. Power output 126 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion from 20-20k Hz, both channels driven. Frequency response 2-100k Hz (± Vk dB). IM distortion 0.1 per cent, S/N ratio 106 dB. Two VU meters with sensitivity controls. Size 151 2x6x91'2 in. 110/220 volts.
  3. Marantz 500 - Stereo power amplifier. Power output 250 watts RMS per channel into 8 ohms at any frequency, both channels driven, with 0.1 per cent harmonic distortion. Frequency response 2-100k Hz ±1.5 dB. Intermodulation distortion 0.1 per cent. S/N ratio 110 dB. Two VU meters, front-panel input and output connections, power limiting and level controls. Size 17%x7x16 in. Wt. 78 lbs. 110-220 volts.
  4. Marantz 2440 Quadradial 4 Adaptor - 4-channel matrix decoder/rear-channel amplifier. Power output 20 watts RMS per channel into 8 ohms at any frequency, both channels driven, with 0.1 5 percent harmonic distortion. Frequency response 15-80k Hz ±2 dB. Intermodulation distortion 0.3 per cent. Built-in regular matrix 4-channel decoder with socket for optional SQ decoder unit. Four VU meters, 4-channel tape monitor circuit, jack for optional 4-channel balance/ volume remote control, remote rear-channel speaker output. Front-panel rear-channel headphone jack. Walnut-finish cabinet optional. Size 17x5x14 in.
  5. Marantz 3200 - Stereo preamplifier. Frequency response 25-20k Hz (phono input). Harmonic distortion 0.05 per cent, S/N ratio 76 dB (phono input). Slide-type bass, midrange and treble tone controls with turnover point selectors, tone control defeat switch, high-frequency filter, tape monitor circuit, balance control, loudness switch, speaker selector switch. Front-panel headphone jack.
  6. Marantz 3300 - Stereo preamplifier. Frequency response 6-80k Hz ±0, -3 dB. Harmonic distortion 0.02 per cent. High and low-frequency filters with selectable frequencies. Defeatable loudness circuit. Two tape monitor circuits. Inputs: microphone, phono (2), tuner, auxiliary (2). Frpnt-panel dubbing and headphone jacks. Center-channel output. Built-in speaker control circuit. Walnut-finish cabinet optional. Size 15/2X 53/4x83/4 in. Wt. 14 lbs. 1 10-220 volts.
  7. Marantz 3600 - Similar to Marantz 3800 except does not have Dolby noise reduction circuitry.
  8. Marantz 3800 - Stereo preamplifier with built-in Dolby noise reduction circuitry. Frequency response 10-20kHz (±0.25 dB). Harmonic distortion 0.25 per cent, IM distortion 0.003 per cent. Hum and noise -100 dB, 82 dB (phono input). Maximum dynamic range 100 dB (phono). Slide-type bass, midrange and treble controls for each channel with click stops, selectable tone control turnover points, low, midrange and high-frequency filters, loudness switch, slide-type balance control, tone control defeat switch, Dolby circuitry with front-panel calibration controls, provisions to use Dolby as single-pass dynamic-type noise reduction filter, Dolby level meter, tape equalization switch, tape dubbing circuits, speaker selector switch. Front-panel microphone, headphone jacks. Size 151/2x6x9V4 in. Wt. 16 lbs.
  9. Marantz 4000 - 4-channel adapter preamp with provision for plug-in SQ matrix decoder. Designed for use with a stereo receiver or amplifier and stereo power amplifier to provide 4-channel sound. Four VU meters, master volume control, optional remote 4-channel volume/balance control, remote speaker control circuit, defeatable loudness circuit, stereo and 4-channel tape monitor circuits, 4-channel synthesizer circuit. High and low-frequency filters, and tone controls for rear channels. Front-panel rear-channel headphone jack. 110/220 volts ac, 50/60 Hz.
  10. Marantz CD-400-Plug-in CD-4 demodulator. Phase lock loop carrier signal circuitry, built-in noise reduction circuitry for each channel. Rear channel calibration controls. CD-4 indicator light. Supplied with CD-4 calibration record. For use with specially-equipped Marantz receivers.
  11. Marantz SQA-1 - Plug-in SQ matrix decoder module with front-rear logic for Marantz units with plug-in provision.
  12. Marantz SQA-2B - Full-logic SQ adaptor for use with specially-equipped Marantz receivers. Frequency response 40-20k Hz, harmonic distortion ±0.2 dB.

.

Mcintosh

.

  1. Mcintosh C-26 - Stereo preamplifier. Frequency response 20-20k Hz (+0, -0.5 dB). Harmonic distortion 0.1 per cent. Hum and noise -74 dB (phono input). Six switch-selected inputs, variable loudness circuit, stereo/monaural mode selector, two tape monitor circuits, high and low-frequency filters, main/remote speaker switching circuit, variable-level center-channel output, front-panel headphone jack. Size 16x5/2x13 in.
  2. Mcintosh C-28 - Stereo preamplifier. Frequency response 20-20k Hz (+0, -0.5 dB). Harmonic distortion 0.1 per cent. Hum and noise -78 dB (phono input). Six switch-selected inputs, defeatable presence and loudness circuits, Stereo/monaural mode selector, two tape monitor circuits, isolated tape dubbing circuit, high and low-frequency filters, main/remote speaker switches (used with optional SCR-2 relay module), variable-level center-channel output, front-panel recorder and headphone jacks, low-frequency (under 100 Hz) level control. Size 16x 5!4x13 in.
  3. Mcintosh MC-250 - Stereo power amplifier. Power output 50 watts rms per channel into 8 ohms with 0.25 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 1 5-60k Hz (+0, -0.5 dB at 50 watts). Hum and noise -90 dB. IM distortion 0.25 per cent. Stereo/ monaural mode selector. Individual channel level controls Size 7x10%x15% in. Max. power consumption 250 watts. Uncovered chassis, no case available.
  4. Mcintosh MC-2100 - Stereo power amplifier. Power output 105 watts rms per channel into 8 ohms with 0.25 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 15-60k Hz (+0, -0.5 dB at 105 watts). Hum and noise -90 dB. IM distortion 0.25 per cent. Stereo/ monaural mode selector. Individual channel level controls. Size 7%x11%x17 in. Max. power consumption 450 watts. Uncovered chassis, no case available.
  5. Mcintosh MC-2105 - Stereo power amplifier. Same as Mcintosh MC-2100 except has anodized black and gold front panel, two peak-reading VU meters with meter-range switch, speaker on/off switch, and front-panel headphone jack. Size 16!4x 7x141/2 in.
  6. Mcintosh MC 2300 - Stereo power amplifier. Power output 300 watts rms per channel into 8 ohms with 0.25 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 20-20k Hz (+0, -0.5 dB at 300 watts). Hum and noise -90 dB. IM distortion 0.25 per cent. Two peak-reading VU meters with meter range switch, individual channel level controls. Size 19x101/2x1 7 in. Max. power consumption 1400 watts.
  7. Mcintosh MC-2505 - Stereo power amplifier. Same as Mcintosh MC-250 except has anodized black and gold front panel, two peak-reading VU meters with meter-range switch, speaker on/off switch and front-panel headphone jack. Size 16x5>2X 13 in.
  8. Mcintosh MQ-101 - Stereo frequency equalizer. Designed for connection between preamplifier and power amp or tape monitor circuit. Separate five-position controls for low, mid and high frequency. Tape monitor circuit. Anodized black and gold front panel.
  9. Mcintosh MQ-102 - Stereo frequency equalizer. Designed for connection between preamplifier and power amp or in tape monitor circuit. Five-position selector alters frequency response under 150 Hz. Variable input attenuator and tape monitor circuit. Unfinished chassis box.
  10. Mcintosh SCR-2 - Speaker and power-control relay module. Controls main/remote speaker and power on/off switching at remote location. Designed for use with Mcintosh C-28 preamplifier.

.

Phase Linear

.

  1. Phase Linear 400 - Stereo power amplifier. Power output 201 watts rms per channel into 8 ohms with 0.25 per cent harmonic distortion, 20-20k Hz, both channels driven. Hum and noise -100 dB. Two output level meters. Size 19x7x10 in. Wt. 35 lbs. Walnut cabinet optional.
  2. Phase Linear 700B - Stereo power amplifier. Power output 345 watts rms per channel into 8 ohms with 0.25 per cent harmonic distortion, 20-20k Hz, both channels driven. Hum and noise-100 dB. Input level controls, two output level meters. Size 19x11x7 in. Wt. 45 lbs. Walnut cabinet optional.
  3. Phase Linear 1000 - Dynamic range expander, noise reduction unit. Distortion 0.25 per cent, frequency response 20-20k Hz (± 1 dB). Increases dynamic range of any stereo signal by 7.5 dB, reduces high-frequency hiss and noise up to 10 dB, for total 17.5 dB improvement. May be used with existing receivers, preamplifiers. Size 91/2 x 5 x 11 in. Wt. 6 lbs. Walnut cabinet optional.
  4. Phase Linear 2000 - Stereo preamplifier. Frequency response 20-20k Hz (± 0.5 dB), distortion 0.25 per cent, hum and noise-74 dB. Bass and treble controls for each channel with switch-selectable turnover points. Defeatable active equalizer. Tone control defeat switch. Two tape monitor circuits. Size 51'2x19x6 in. Wt. 15 lbs. Walnut cabinet optional.
  5. Phase Linear 4000 - Stereo preamplifier with SQ4-channel decoder, dynamic range expander and noise reduction circuits. Frequency response 20-20k Hz (± 0.5 dB), distortion 0.25 per cent, noise -72 dB (phono input). Bass, treble controls with switch-selectable turnover points, 4-channel balance control. Defeatable dynamic expansion, noise limiting circuits with adjustable threshold controls. Defeatable active equalizer. Differential logic SQ decoder. Two tape monitor circuits. Front-panel accessory outputs. Size 19x7x10 in. Wt. 18 lbs. Walnut cabinet optional.

.

Pioneer

.

  1. Pioneer Spec-1 - Stereo preamplifier. Frequency response 20-15kHz (±0.2 dB), harmonic distortion 0.03 per cent, hum and noise -70 dB (phono input). Defeatable bass and treble controls with 11-step main, 7-step sub-controls, stepped volume control, balance control, 2-step attenuator, 2-step high and low-frequency filters, front-panel phono input level control, tape monitor/dubbing circuits, microphone mixing control, speaker selector switch. Front-panel microphone and headphone jacks. Size 19x71mx141/2 in. Wt. 251/2 lbs. 120 volt, 60 Hz.
  2. Pioneer Spec-2 - Stereo power amplifier. Power output 250 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion, 20-20k Hz, both channels driven. Level controls, two peak-reading meters. Protection circuit activation indicator light. May be rackmounted.
  3. Pioneer SR-202W - Stereo reverberation preamplifier. Frequency response 20-35k Hz ±2 dB, harmonic distortion 0.2 per cent, hum and noise -65 dB. Output voltage 330 mV into 10k ohms. Reverberation time adjustable (0-2.5 sec). Input impedance 300k ohms. Two tape monitor circuits. Unit designed for connection in tape monitor circuit of amplifier. Size 13x5)4x10/2 in. Wt. 13 lbs.

.

Quad

.

  1. Quad 33 - Stereo preamplifier. Frequency response 20-20k Hz (± 0.5 dB). Distortion 0.02 per cent. Hum and noise-90 dB (phono input). Bass and treble controls, defeatable three-step mid/high-frequency filter with adjustable filter slope, balance control. Size 101<4x31 /2X6V2 in. Wt. 6V2 lbs. 100/260 volts, 50/60 Hz.
  2. Quad 303 - Stereo power amplifier. Power output45 watts per channel into8 ohms. Distortion 0.1 per cent. Frequency response 20-20k Hz. Hum and noise-100 dB. Inputs, outputs, voltage selector all located on front panel. Size 5x61/4x13 in. Wt. 18 lbs. 100/250 volts, 50/60 Hz.
  3. Quad 405 - Stereo power amplifier. Power output 100 watts rms per channel into 8 ohms, 100-10kHz, both channels driven. Distortion 0.05 per cent, frequency response 10-20kHz, hum and noise-90 dB. Size 41/2x131/2x8 in. Wt. 20 lbs. 110/240 volts, 50/60 Hz.

.

Revox

.

  • Revox A-722- Stereo power amplifier. Power output 45 watts rms per channel into 8 ohms. Distortion 0.2 per cent from 40-15k Hz. Frequency response 20-20k Hz (-0.5 dB), power bandwidth 10-65kHz. S/N ratio 90 dB. Power limiter switch, outputs for two sets of stereo speakers, overload indicator, built-in cooling fan. Front-panel headphone jack. Size 101/2x61/4x15 in. 110/250 volts, 50/60 Hz.

.

Russound

.

  1. Russound GIMP - Two-input microphone mixer. Frequency response 20-20k Hz (±0.2 dB). Output impedance 70 ohms maximum. Input impedance 100k ohms each channel. Powered by one 9 volt battery. Metal case. Size 2x2x6 in. Wt. 1 5 oz.
  2. Russound lmp-1 - Impedance matching unit. For use in converting impedance of high input and low output systems. Frequency response 20-20k Hz (±0.2 dB). Input impedance 4 megohms (30-1 k Hz), 1 megohm (1 -20kHz). Output impedance 100 ohms (20-20k Hz). Powered by one 9 volt battery. Metal case. Size 2x2x6 in. Wt. 14oz.
  3. Russound MP-2 - Switching unit for use with two amplifiers and up to 4 sets of stereo speakers. Maximum power input 1 5 watts rms per channel. Variable volume controls for each set of speakers. Size 3V?x8]Ax4- in.
  4. Russound SWB-2 - Switching unit for use with two amplifiers and up to 3 sets of stereo speakers. Maximum power input 70 watts rms per channel. Size 2x7x3 in. Wt. 1 x/i lbs. Also available as SWB-2W with walnut-finish case.
  5. Russound TMS-1 - Tape monitor circuitry unit for use with three tape decks or other input/output functions. Size 3x4^4x3!^ in. Wt. YA lbs. Also available as TMS-1 W with walnut-finish case.
  6. Russound QT-1 - 4-channel/stereo switching/patching unit. Connects to tape monitor circuit, provides for connecting equalizers, noise reduction units, tape recorders, etc. Switches provide for full interconnection.

.

SAE

.

  1. SAE Mark 1B - Stereo preamplifier/ equalizer. Frequency response 10-100k Hz (±0.25 dB). Harmonic distortion 0.02 per cent. IM distortion 0.02 per cent. Hum and noise -80 dB (phono input). Gain 62 dB (phono), 20 dB (aux input). Max. output 14 volts (Hi-Z load). Five switch-selected inputs, stereo/monaural mode selector, isolated tape dubbing circuit, tape monitor circuit, gain-range selector, main/remote speaker control circuit, front-panel recorder and headphone jacks. Equalizer section provides up to ±16 dB continously variable equalization at seven frequencies (40, 120, 320, 960, 2.5k, 7.5k, 15k Hz). Size 17x10^x53/4 in. Wt. 20 lbs. 110/220 volts ac, 50/60 Hz.
  2. SAE Mark 1M - Stereo preamplifier. Frequency response 10-100k Hz (±0.25 dB). Harmonic distortion 0.02 per cent. IM distortion 0.02 per cent. Hum and noise -80 dB (phono input). Gain 62 dB (phono), 20 dB (aux input). Max. output 14 volts (Hi-Z load). Five switch-selected inputs, stereo/monaural mode selector, two VU meters, gain-range selector, main/remote speaker selector circuit, front-panel recorder and headphone jacks, tape monitor circuit, isolated tape dubbing circuit. Size 17x10/2 x53/4 in. Wt. 20 lbs. 110/220 volts ac, 50/60 Hz.
  3. SAE Mark IXB - Stereo preamplifier/ equalizer. Frequency response 10-100k Hz ±0.25 dB (aux input). Harmonic distortion 0.02 per cent, IM distortion 0.02 per cent, S/N ratio 75 dB (phono input). Gain 42 dB (phono), 20 dB (aux input). Output impedance 600 ohms. Seven controls vary response ±16 or 8 dB at peak frequencies (40, 1 20, 320, 960, 2.5k, 7.5k and 1 5k Hz). Four inputs (2 phono). Tape monitor circuit. Front panel headphone jack. Size 1 7x5x7 in. 1 1 0 volts ac, 50/60 Hz.
  4. SAE Mark XXX - Stereo preamplifier. Frequency response 10-100k Hz (±0.25 dB). Harmonic distortion 0.02 per cent. IM distortion 0.02 per cent. Hum and noise -80 dB (phono). Switch-selected inputs, tape monitor circuit. Size 17x10/>x5% in. Wt. 15 lbs. 110/220 volts ac, 50/60 Hz.
  5. SAE Mark III - Stereo power amplifier. Power output 120 watts RMS per channel into 8 ohms (both channels driven) with 0.1 per cent harmonic distortion at any frequency 20-20k Hz. Frequency response 20-20k Hz ±0.1 dB at 120 watts. Hum and noise -100 dB, IM distortion 0.1 per cent. IHF power bandwidth 8-50k Hz. Input impedance 100k ohms. Dual VU meters with meter range controls. Front panel level controls. Dual power supplies. Size 17x1 5x5% in. Wt. 45 lbs.
  6. SAE Mark IIIM - Stereo power amplifier. Same as SAE Mark III except has two VU meters and meter-range switch.
  7. SAE Mark XXV - Stereo power amplifier. Power output 300 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion, 10-30k Hz, both channels driven. IM distortion 0.05 per cent, S/N ratio 100 dB. Two VU meters with range selector, push-button input level selectors. Forced-air cooling. Size 19x7x16 in. Wt. 68 lbs. 110/125 volts, 50/60 Hz.
  8. SAE Mark IVD - Stereo power amplifier. Power output 100 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 20-20k Hz (±0.25 dB) at rated output. Hum and noise -100 dB, IM distortion 0.05 per cent. Size 17x13x5% in. Wt. 35 lbs.
  9. SAE Mark IVDM - Same as SAE Mark IVD except has two VU meters with variable sensitivity control.
  10. SAE Mark XXXI - Stereo power amplifier. Power output 60 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 20-20k Hz (±0.1 dB) at 60 watts. Hum and noise -100 dB. IM distortion 0.1 per cent. Size 17x13x5% in. 110/220 volts ac, 50/60 Hz.
  11. SAE Mark VII - Active audio (stereo) equalizer. Eleven controls vary response up to±16 dB at peak frequencies (40, 80, 160, 320, 640, 1 280, 2.5k, 5k, 10k, 1 5k and 20k Hz). Unequalized frequenzy response 20-20k Hz ±0.25 dB. Harmonic distortion 0.05 per cent, IM distortion 0.05 per cent, S/N ratio 90 dB. Insertion loss 1 dB. Input impedance 100k ohms, output impedance 600 ohms. Size 17x7x5% in. Wt. 16 lbs.
  12. SAE Mark XXVII - Same as SAE Mark VII except has separate controls for each channel.

.

Sansui

.

  1. Sansui BA-3000 - Stereo power amplifier. Power output 170 watts rms per channel into 8 ohms with 0.03 per cent harmonic distortion from 20-20k Hz, both channels driven. Frequency response 5-100kHz (-1 dB), power bandwidth 5-25k Hz, hum and noise -100 dB, IM distortion 0.05 per cent. Input level controls, two output meters, defeatable subsonic filter. Outputs and switches for two sets of stereo speakers. Size 181'4x7x16 in. Wt. 50 lbs. 100/240 volts, 50/60 Hz.
  2. Sansui BA-5000 - Stereo power amplifier. Power output 300 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion, 20-20k Hz, both channels driven. Outputs may be strapped to produce 600 watts rms. Frequency response 15-30k Hz (-2 dB), IM distortion 0.1 percent. Hum and noise-100dB. Level controls, two VU meters, protection circuit activation light. Size 19x9x181,2 in. Wt. 108 lbs. 100/240 volts, 50/60 Hz.
  3. Sansui CA-3000 - Stereo preamplifier. Frequency response 10-100k Hz (±.5 dB), harmonic distortion 0.03 per cent, hum and noise -70 dB (phono input), IM distortion 0.03 per cent. Volume control, two VU meters with input and sensitivity selector switches, defeatable bass and treble controls with 3-position turnover point selector, midrange control, balance control, two-step muting switch, two-step high and low-frequency filters, three tape monitor and dubbing circuits, three-step phono input
  4. sensitivity and input capacitance selectors. Front-panel headphone jack. Size 18/4x7X15 in. Wt. 291/2 lbs.
  5. Sansui ECA-3 - Stereo electronic crossover and four channel power amplifier. Incorporates electronic crossover system and two stereo power amplifiers for use with bi-amp speaker system. Power output of amplifiers 20 and 28 watts RMS per channel into 8 ohms. Harmonic distortion 0.3 per cent. Frequency response 20-60k Hz ±1 dB at one watt. IM distortion 0.3 per cent, hum and noise -80 dB. Load impedance 4-16 ohms. 110-220 volts.
  6. Sansui QC-04 - CD-4 4-channel demodulator. Add-on unit to be placed between turntable and amplifier to decode CD-4 material. Frequency response 20-1 5k Hz. Size 4//4x6!4x 1 1 '/2 in. Wt. 5 lbs. 1 1 0/220 volts ac, 50/60 Hz.
  7. Sansui QS-1 - 4-channel decoder/synthesizer. May be used as discrete 4-channel control unit, matrix decoder and to produce 4-channel effect with stereo material. Frequency response 20-20k Hz ±1 dB. Inputs and outputs for stereo and 4-channel tape recorders. Connects to monitor circuit of amplifier-requires additional power amplifier for complete 4-channel. Four VU meters and function controls. Size 5x1 5%x11 in. Wt. 1 3 lbs. 110-220 volts.
  8. Sansui QS-500 - 4-channel decoder/ rear-channel amplifier. Power output 33 watts RMS per channel into 8 ohms with 0.5 per cent harmonic distortion. Frequency response 20-50k Hz ±1 dB at 1 watt. Hum and noise -80 dB, IM distortion 0.5 per cent. 4-channel section has matrix decoder, circuit to create 4-channel effect with stereo material and handles discrete 4-channel material. Decoder output 775 mV. to front amp. Four VU meters. Inputs for stereo and 4-channel tape recorders. Tape monitor circuit. Size 15x6/2x13/4 in. Wt. 22 lbs. 110-220 volts.
  9. Sansui RA-500 - Stereo reverberation preamplifier. To be connected in front of power amp or in tape monitor circuit. Frequency response 20-30k Hz ±2 dB. Harmonic distortion 0.2 per cent. S/N ratio 65 dB. Input impedance 200k ohms, load impedance 100k ohms. Maximum input voltage 3V. Inputs and outputs for two tape recorders. Variable reverberation time. Size 6/>x12x 10/2 in. Wt. 1 2 lbs. 1 10-220 volts.
  10. Sansui RA-700 - Stereo reverberation preamplifier. To be connected in tape monitor circuit of receiver or control amplifier. Frequency response 20-20k Hz (± 2 dB). Harmonic distortion 0.2 per cent at 1 k Hz. S/N ratio 65 dB. Reverberation time 1.9-3.2 sec. Inputs/outputs for two tape recorders. Reverb time control, tape monitor circuits, multi-color display panel. Size 5x11x11 in. Wt. 91/2 lbs. 100/240 volts, 50/60 Hz.

.

Shure

.

  1. Shure M64-2E - Solid state stereo preamplifier. Compact phono/mic/tape head preamplifier. Frequency response 20-20k Hz ±2 dB. Switchable equalization for phono and tape. Harmonic distortion 1.0 per cent. High and low level outputs. Size 5J4x2J4x4)4 in. Wt. 2 lbs. 11 0-220 volts ac.
  2. Shure M63-2E Audio Control Center -Compact monaural preamplifier/equalizer. Frequency response 20-20k Hz ±2 dB. Harmonic distortion 1.0 per cent. Five outputs including 600 ohm line and headphone. S/N ratio 68 dB. Two inputs with 50k ohms impedance. Equalizer section has high and low frequency filters and high and low roll-off filters with 6 dB per octave roll-off rate. Selectable roll-off frequencies. Size 11/>x 2/2x5/4 in. Wt. 4 lbs. 220 volts ac, 50/60 Hz.
  3. Shure M67-2E Microphone Mixer -Four-input microphone mixer. Frequency response 20-20k Hz ±2 dB. Harmonic distortion 1.0 per cent. Inputs: microphone (4), line (bridging and termination). Outputs: line, microphone and headphone. Metal case. Size 2/2x11/2x7/2 in. Wt. 5 lbs. 220 volts ac, 50/60 Hz.
  4. Shure M675 Broadcast Master - Four-input line/mic mixer. Frequency response 20-20k Hz ±2 dB. Inputs: phono/line (2), line (2). All input controls have "cue" position. Internal cue and program speaker. Size 2/2x11 K>x71/2 in.
  5. Shure M688FCE Mixer - Solid state stereo microphone mixer. Frequency response 40-20k Hz ±3 dB. Harmonic distortion 1.0 per cent. Gain 59 dB. Accommodates four high or low impedance microphones. Pan control switches one microphone from one channel to another. Four outputs with different impedances. Size 21 2x111/2x7 in. Wt. 5 lbs. 220 volts ac or 30 volts dc.
  6. Shure VA-302E6 - Solid state professional sound system. Designed for use by performing groups in large areas. Power output 100 watts RMS with 5.0 per cent harmonic distortion. Frequency response 50-10k Hz ±3 dB. Hum and noise -60 dB. Six input channels each with tone and reverb controls. Four anti-feedback filters. VU meter. Reverb control circuitry. Each speaker column has two 1 0-in woofers and four 8-in tweeters. Size: speaker column 623/4x1534x 83a in, amplifier 8y2x25x1434 in. Total system wt. 1 1 1 lbs. Built-in 6-way international voltage selector, 50/60 Hz.
  7. Shure M68RM-2E - Microphone mixer/reverberation unit. Frequency response 40-20k Hz (± 3 dB), harmonic distortion 1.0 per cent, hum and noise-70 dB. Inputsforfour microphones, plus auxiliary input. Microphone inputs have high/low impedance switches. Volume control for each channel plus master volume control. Built-in reverberation on all four channels. High and low impedance outputs. Size 21/2X111/2X5V4 in. Wt. 4 lbs. 210/240 volts, 50/60 Hz.
  8. Shure M610-2E - Public address system feedback controller. Eight filters allow equalization of system frequency response to allow higher volume levels without feedback. Center frequencies 63, 125, 250, 500, 1 k, 2k and 8k Hz. High and low-end roll-off filters. Variable amplification control. 220 volt, 50/60 Hz.
  9. Shure SE-30-2E - Compressor/mixer. Frequency response 30-20k Hz (± 2 dB), distortion 2.0 per cent (maximum). Will provide from 10-30 dB compression of input signal. Memory circuit maintains compression level when no signal is present. Compression response rate adjustment. Three microphone inputs with mic/line sensitivity selectors, auxiliary input. Balanced line output and auxiliary output. Provisions for interconnecting two units or using in stereo system. Individual channel input level controls, output level control. Low frequency roll-off filters. VU/compression/battery-check meter. Size 10x4x31/2 in. Wt. 10 lbs. Six 9-volt batteries or 220 volt, 50/60 Hz.
  10. Shure SR-101 - Audio mixer/preamplifier. Inputs for eight low-impedance microphones. Volume, reverberation, high and low-frequency equalization and input attenuation for each. Provisions for two high level inputs. Program and monitor outputs, balanced line output, stereo headphone output. Master volume control, master reverberation control, anti-feedback using notch filters at center frequencies of 130, 800, 2k and 5kHz, VU meter, tone oscillator. Size 121 Mx19x61 2 in. Wt. 22 lbs.

.

Sony

.

  1. Sony SB-300 - Passive stereo audio switching unit for tape recorder control. Accommodates three stereo tape recorders. Three tape monitor circuits, isolated dubbing circuit.
  2. Sony SQA-200 - 4-channel matrix ae-coder/rear-channel (stereo) amplifier. Power output 8 watts rms per channel into 8 ohms with 5.0 per cent harmonic distortion. Mode selector for stereo, stereo-to-4-channel synthesis, SQ matrix with front-rear logic and discrete 4-channel. Separation: left-right 30 dB, front-rear 10 dB. Tape monitor circuit, complete rear-channel amplifier controls. Size 13x3x11 in. Wt. 8 lbs. 110/220 volts ac, 50/60 Hz.
  3. Sony SQD-1000 - 4-channel matrix decoder. Mode selector for stereo, stereo-to-4-channel synthesis, SQ matrix with front-rear logicand discrete4-channel. Separation: left-right 30 dB, front-rear 10 dB. Tape monitor circuit. Size 9x31/4x10 in. Wt. 5 lbs. 110/220 volts ac, 50/60 Hz.
  4. Sony SQD-2010 - 4-channel matrix decoder. Frequency response 20-20k Hz (±3 dB), harmonic distortion 0.1 per cent, S/N ratio 80 dB. Mode selector for stereo, stereo-to-quadraphonic synthesis, regular matrix and discrete 4-channel. Front-to-back and wave matching logic circuitry. Four VU meters, tape monitor circuit. Size 16x6x13 in. Wt. 13 lbs. 100/240 volts, 50/60 Hz.
  5. Sony TA-2000F - Stereo preamplifier. Frequency response 20-100k Hz -2 dB (Aux input). Harmonic distortion 0.3 per cent. IM distortion 0.05 per cent. S/N ratio 70 dB (phono input). High level input impedance 100k ohms. Nine inputs, five outputs. Front panel jacks for mic input, aux input, headphone and line output. High and lowfrequen-cy filters. Tape monitor circuit. Dual VU meters. Size 1 53/4x53/4x12% in. Wt. 20 lbs. 110-220 volts.
  6. Sony TA-3200F - Stereo power amplifier. Power output 100 watts RMS per channel into 8 ohms (both channels driven) with 0.1 per cent harmonic distortion at any frequency 20-20k Hz. Frequency response 5-200k Hz -2 dB. S/N ratio 1 10 dB, IM distortion 0.1 per cent. Remote speaker outputs. Two inputs. Individual level controls, input selector and power limiter switch. Size 1 5%x 6x123/4 in. Wt. 31 lbs. 110-220 volts.
  7. Sony TAE-5450 - Stereo preamplifier. Frequency response 10—100k Hz (-1 dB), harmonic distortion 0.03 per cent, IM distortion 0.05 per cent, S/N ratio 70 dB (phono input). Bass and treble controls for each channel with 2-step turnover point selectors, tone control defeat switch, 2-step high and low-frequency filters, muting switch, balance control, external adaptor switch, tape monitor/dubbing circuits. Front-panel headphone, external adaptor, auxiliary input jacks.
  8. Sony TAE-8450 - Stereo pre-amplifier. Frequency response 10-100k Hz (±1 dB), harmonic distortion 0.05 per cent, S/N ratio 70 dB (phono input), IM distortion 0.03 per cent. Volume control, two-channel horizontal scale meter with sensitivity selector and VU/peak/peak hold mode selector, meter input selector, defeatable bass and treble controls for each channel with 2-position turnover point selectors, two-step high and low-frequency filters, presence switch, microphone level/mixing control, two tape monitor and dubbing circuits, phono input selector/sensitivity control. Front-panel microphone, auxiliary input and headphone jacks. Size 171/2x7x131 2 in. Wt. 26 lbs. 100/240 volts. 50/60 Hz.
  9. Sony TAN-5550 - Stereo power amplifier. Power output 50 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response DC-100k Hz (-2 dB), IM distortion 0.1 per cent. Level controls, input selectors, speaker selector switch. Size 171 4x7x13 in. Wt. 241m lbs. Sony TAN-8250 - Stereo power amplifier. Power output 150 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response DC-100kHz (-1 dB), power bandwidth 5-50k Hz, S/N ratio 100 dB, IM distortion 0.1 per cent. Input level controls, two-channel peak-reading horizontal scale output meter with sensitivity selector, 4-position power limiter switch, output level control. Outputs and switches for two sets of stereo speakers. Size 171/2x7x16in.Wt. 511/2 lbs. 100/240 volts, 50/60 Hz.
  10. Sony TAN-8550 - Stereo power amplifier. Power output 100 watts rms per channel into 8 ohms with 0.1 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response DC-100k Hz (-1 dB), power bandwidth (IHF) 5-50kHz, IM distortion 0.1 per cent, S/N ratio 100 dB. Level controls, input selectors, speaker selector switch, independent level control for "B" speakers, power output meters, meter sensitivity switch. Size 171/2x7x17 in. Wt. 42 lbs. 100/240 volts, 50/60 Hz.

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Soundcraftsmen

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  1. Soundcraftsmen PE-2217 - Stereo preamplifier/audio equalizer. Frequency response 10-100k Hz (+0.25 dB). Harmonic distortion 0.02 per cent. IM distortion 0.02 per cent. Hum and noise -90 dB. Four switch-selected inputs, two tape monitor circuits, isolated tape dubbing circuit, LED balance indicators, stereo/monaural mode selector, front-panel headphone and recorder jacks. Equalizer section provides up to ±12 dB continuously variable equalization at ten frequencies (30, 60, 120, 240, 480, 960, 1 920, 3840, 7680 and 1 5,360 Hz) for each individual channel. With case. 110/220 volts ac, 50/60 Hz.
  2. Soundcraftsmen RP-2212 - Same as Soundcraftsmen Model 20-12 except has visual display of input and output signals and tape equalization circuitry.
  3. Soundcraftsman 20-12A - Stereo equalizer. Frequency response 20-20k Hz (±0.5 dB), harmonic distortion 0.1 per cent, IM distortion 0.1 per cent, S/N ratio 65 dB. Ten slide-type controls for each channel. Center frequencies 30, 60, 120, 240, 480, 960, 1920, 3840, 7680 and 15,360 Hz. Output level of each channel individually adjustable. Walnut grained vinyl cabinet.

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Teac

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  1. Teac AN-60-W - Stereo noise reduction unit. Utilizes Dolby B-type system. Frequency response 20-25k Hz ±2 dB. Harmonic distortion 0.5 per cent, channel separation 50 dB. Calibration meter, record level controls, built-in oscillator, FM multiplex filter. S/N ratio improvement of 10 dBatlOk Hz. Size4x71/2x101/2in. Wt. 51/2 lbs. 100/240 volts, 50/60 Hz.
  2. Teac AN-80 - Stereo noise reduction unit. Utilizes Dolby B-type system to reduce noise incurred in tape recording. Frequency response 20-1 5k Hz ±2 dB. Harmonic distortion 0.5 per cent. Calibration meter, record level controls, built-in oscillator. S/N ratio improvement 10 dB at 10k Hz. Size 3/2x16x 10% in. Wt. 9 lbs. 1 10-220 volts ac, 50/60 Hz.
  3. Teac AN-180 - Stereo noise reduction unit. Utilizes Dolby B-type system to reduce noise incurred in tape recording. Has four Dolby circuits to allow simultaneous recording and playback. Frequency response 20-1 5k Hz ±0.5 dB. Harmonic distortion 0.3 per cent. S/N ratio 65 dB. Built-in multiplex filters and test tone oscillator. Built-in microphone preamplifier. Input impedance 600 ohms mic, 100k ohms line. Noise reduction 5 dB at 1 k Hz, 1 0 dB at 10k Hz. Output level 1V. Dual VU meters. Size 5)4x1 6x1 2% in.
  4. Teac AN-300 - 4-channel noise reduction unit. Utilizes Dolby B-type system. Four Dolby circuits may be used for simultaneous stereo record/playback or one-way 4-channel operation. Frequency response 20-20k Hz ±1.5 dB. Harmonic distortion 0.2 per cent. Noise reduction 5 dB at 1k Hz, 10 dB at 10k Hz. Four VU meters, built-in calibration oscillator, multiplex filter, input and output level controls. Size 63/4x16x10 in. Wt. 1 7 lbs. 1 1 0/220 volts ac, 50/60 Hz.

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Technics

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  1. Technics SE-9600 - Stereo power amplifier. Power output 11 0 watts rms per channel into 8 ohms with 0.08 per cent harmonic distortion, 20-20k Hz, both channels driven. Frequency response 5-1 50k Hz (-3 dB). Power bandwidth 5-60k Hz (-3 dB), IM distortion 0.08 per cent, hum and noise -110 dB. Two VU meters with variable sensitivity. Outputs and switches for two sets of stereo speakers. Separate left and right channel gain controls, variable output impedance and front-panelheadphone jack. 7%x1 7%x1 6% in. Wt. 52 lbs. 1 1 0/220 volts ac, 50/60 Hz.
  2. TechnicsSH-400-CD-44-channel demodulator. Add-on unitto be placed between turntable and amplifier to decode CD-4 material. Frequency response 20-1 6k Hz. S/N ratio 60 dB. Channel separation 30 dB (front to rear), 55 dB (leftto right). Hi-blend filter and cartridge selectorswitch. Size51/?x8/4x13 in. Wt. 11 lbs. 1 1 0/220 volts ac, 50/60 Hz.
  3. Technics SH-3433 - 4-channel audio display oscilloscope. Modes for simultaneous display of all four channels, each individual channel and multipath. Front-panel high/ low-input selector. Size 16x5/2x13/2 in. Wt. 1 5 lbs. 1 10/220 volts ac, 50/60 Hz.
  4. Technics SU-9600 - Stereo preamplifier. Frequency response 2-1 00k Hz (-3 dB), harmonic distortion 0.02 per cent, hum and noise -73 dB (phono input). Two phono inputs plus three high-level inputs. High and low frequency filters with variable cut-off frequencies. Tape monitor circuit. Selectable frequency bass and treble tone controls. Variable input impedance controls. Size 6/4x1 73/4x13% in. Wt. 23 lbs. 1 1 0/220 volts ac, 50/60 Hz.

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Toshiba

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  1. Toshiba SC-410 - 4-channel decoder/ rear-channel amplifier. Power output 15 watts rms per channel into 8 ohms with 0.8 per cent harmonic distortion. Frequency response 20-40k Hz, power bandwidth 20-40k Hz. 4-channel simulation circuitry with four modes. High frequency filter. Outputs and switches for two sets of rear-channel speakers. Size 12x15V4X 41/a in. Wt. 9 lbs. 1 1 0/220 volts ac, 50/60 Hz.
  2. Toshiba SY-404S - CD-4 demodulator. Add-on unit to be connected between turntable and preamplifier to decode CD-4 material. CD-4 carrier indicator, volume control, stereo/CD-4 switch. Size 8x15x13/4 in. Wt. 6.6 lbs. 110/240 volts, 50/60 Hz.

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