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1. Advent FBC Frequency Balance Control - Active stereo equalizer. Ten, one-octave frequency controls per channel covering frequencies from 20 to 20,480 Hz. Maximum equalization ±12 dB. Built-in preamplifiers with adjustable gain, frequency response 20-20kHz ±2 dB, harmonic distortion 0.5 per cent, IM distortion 0.2 per cent, S/N ratio 60 dB. Input impedance 150K ohms, output impedance 7K ohms, maximum output signal 4.5V. Equalization defeat switch, tape monitor switch and A-B comparison switch. Size 12x73/ix33/4 in.
2. Advent Model 100 - Noise Reduction Unit - Record/playback tape recorder control center with Dolby type B noise reduction system. Record section has line and microphone preamplifiers and Dolby recording system. Playback section has Dolby playback system and line preamplifier. Level controls for mic and line inputs, recording level, and output level. Meters and built-in oscillator for calibration. Front panel headphone jack. Source-tape monitor switches. Defeatable multiplex filter. Harmonic distortion 0.5 per cent. Noise reduction 3 dB at 600 Hz, 10 dB above 4kHz. Input impedance 50K ohms, output level 1.0 volt into 1K ohm. Size 13x 5x8%. Case optional.

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• Advocate Model 101 Noise Reduction Unit - Tape recording control center with Dolby tape B 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 4kHz. Input impedance 50K ohms, output impedance 100 ohms. Size 12Y4x7x2/2 in. Wt. 9 lbs. Wood end panels.

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1. Altec 729A Acousta-Voicette - Active stereo equalizer. Twenty-four, one-third octave controls per channel covering frequencies from 63 to 12.5kHz. Maximum equalization -14 dB. Built-in preamplifiers with adjustable gain, frequency response 20-20kHz ±1 dB, harmonic distortion 0.5 per cent. Tape monitor switch. Size 18'/2X 5V4x7 in.
2. Altec 770A Bi-amp - Solid state electronic crossover and dual channel amplifier. Contains two monaural amplifiers and electronic crossover with crossover frequencies at 500 or 800 Hz. Power output 60 and 30 watts RMS into 8 ohms with 0.3 per cent harmonic distortion at all frequencies 20-20kHz. Frequency response 20-20kHz ±0.5 dB. Hum and noise -80 dB. Unit is designed to be installed in speaker cabinet and has built-in sensing circuit which turns on amplifiers in the presence of an input signal. Size 6'/2x 10x9 in.

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1. Crown International IC 150 - Solid state stereo preamplifier console. Frequency response 3-100kHz i0.6 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 loudnesscircuit. Continuously variable mono/ stereo/stereo-reverse control. Size 5/4x17x 8 in. Wt. 10 lbs. 110-220 volts.
2. Crown International D-40 Power Amplifier - Solid state stereo power amplifier. Power output 30 watts RMS per channel into 8 ohms (both channels operating). Frequency response 20-20kHz J 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 19x1V4x73/4 in. Wt 8'/2lbs. 110-220 volts.
3. Crown International D-150 Power Amplifier - Solid state stereo power amplifier. Power output 90 watts RMS per channel into 8 ohms (both channels operating). Frequency response 20-20kHz I 0.1 dB (at 1 watt). IM distortion 0.1 per cent. Hum and noise -100 dB. Load impedance 4-16 ohms. Input level controls on rear of unit. Size 17x5/4 x9 in. Wt. 16 lbs. 110-220 volts.
4. Crown International DC-300 Power Amplifier. - Solid state stereo power amplifier. Power output 170 watts RMS per channel (both channels operating) into 8 ohms. Frequency response (at one watt) 0-100kHz i0.6 dB. IM distortion 0.1 per cent. 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. Overall amplifier gain (into 8 ohms) 26 dB. Size 19x7x9V4 in. Wt. 40 lbs. 110-220 volts.

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1. Dynaco PAT-4 - Solid state stereo preamplifier. Frequency response 10-100 kHz ±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%x9 in. Wt. 10 lbs. 110-220 volts.
2. Dynaco Stereo 120 - Solid state stereo power amplifier. Power output 60 watts RMS per channel into 8 ohms with o.25 per cent harmonic distortion at any frequency 20-20kHz. IHF power bandwidth 5-50kHz. IM distortion 0.5 per cent. Hum and noise -95 dB (unweighted). Input impedance 100K ohms. Load impedance 4-16 ohms. Size 13x 10/2 x4 in. Wt. 20 lbs. 110-220 volts.
3. Dynaco QD-1 Quadapter - J unction box for Dynaquad 4-channel system. Contains passive circuit to de-matrix 4-channel effect from stereo material. May be connected to any stereo amplifier or receiver which can have outputs connected to a common ground. Unit has electrical null balance circuit, front speakers only mode and rear speaker volume control. Factory assembled.

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1. Electro-Voice EVX-4 - Four channel decoder for Electro-Voice Stereo-4 encoded material. Unit connects ahead of power amplifier or in tape monitor circuit of control amplifier. Frequency response 10-100kHz, Harmonic distortion 0.15 per cent, IM distortion 0.25 per cent. Input impedance 50k ohms, output impedance 3k ohms. Unity gain. Master gain/power switch plus function switch. Size 2V2 x5'/4 x7 in. 110 volts.

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1. Fisher K-10 Dynamic Spacexpander - Tube-type reverberation preamplifier. Unit connects between preamp and power amp or into tape monitor circuit. Uses Hammond electro-mechanical reverb unit. Variable reverberation strength. Three tubes including rectifier. 110 volts.

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1. Harman-Kardon Citation Eleven - Solid state stereo preamplifier-equalizier. 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 and speaker selection system in conjunction with power amp. Audio equalizer has five sliding controls which vary selected frequencies (60, 320, 1k, 5k and 12kHz) I 12 dB. Two tape monitor circuits. Recommended output load 10k ohms. Size 16x4^x12 in. Wt. 20 lbs. 110-220 volts.
2. Harman-Kardon Citation Twelve - Solid state stereo power amplifier. Power output 60 watts per channel into 8 ohms (both channels driven) with 0.2 per cent harmonic distortion at any frequency 20-20kHz. Frequency response 1-70kHz 0.5 dB at 1 watt. Im distortion 0.15 per cent. Hum and noise -100 dB. Input impedance 30k ohms. Dual power supplies. Size 5'/> x 12'/2x12V4 in. Wt. 30 lbs. 110-220 volts.

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1. Howland-West Multi-Control Mk II - Passive switching system. Controls output of amplifier into two sets of stereo speakers and two sets of stereo headphones. Separate volume controls for each channel of speaker or headphone set. Function control. Two front panel headphone jacks. Size 12x3% x3% in. Wt. 2 lbs. With teak finish cabinet.
2. Howland-West Input Comparator Mk II - Passive switching system. Inputs for six turntables. Outputs for six amplifiers. Allows any of the turntables to be connected to any of the amplifiers. Size 6% x3'/4 x3'/2 in. Wt. 19 ozs.
3. Howland-West Output Comparator Mk II - Passive switching system. Inputs for six amplifiers. Outputs for nine sets of stereo speakers and one set of stereo headphones. Any of the amplifiers may be connected to any of the speaker sets. Size 12x3/4 x3'/a in. Wt. 29 oz.

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1. Infinity SPC - Solid state stereo preamplifier-equalizer. Frequency response 20-20 kHz ±0.1 dB (3-230kHz -3 dB). Harmonic distortion .007 per cent, IM distortion .005 per cent. Hum and noise -74 dB (phono input). Five inputs(2 phono), plustape monitor. Two outputs. Load impedance 10k ohms. Equalizer section has nine controls which vary response d 9 dB at peak frequencies (50, 100, 200, 400, 800, 1.6k, 3.2k, 6.4k and 12.8kHz). Size 13x8'/2 x4'/2 in. Wt. 6 lbs.

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1. JVC-Nivico MCP 105E - Solid state stereo preamplifier-equalizer. Frequency response 18-50kHz ^0.5 dB. Hum and noise -80 dB (Phono input, weighted). Input impedance 80k ohms. Rumble filter and pink noise generator for phase and level checks. Equalizer section has controls to vary response 110 dB at peak frequencies (40/60, 150, 400, 1kHz, 2.4k, 6k and 15kHz). Two tape monitor circuits and 20 dB volume attenuation switch. Size 51/? x17x11 /2 in. Wt. 19 lbs. 110-220 volts.
2. JVC-Nivico MCM 105E - Solid state stereo power amplifier. Power output 50 watts RMS per channel into 8 ohms. Harmonic distortion 0.07 per cent, IM distortion 0.15 per cent. Hum and noise -110 dB. Input impedance 120k ohms, load impedance 4-16 ohms. Remote speaker output, front panel headphone jack. Variable damping factor for 8 ohm loads. Dual VU meters with meter sensitivity control. Size 5'/? X8/2 x12'/> in. Wt. 17 lbs. 110-220 volts.
3. JVC-Nivico ECA-101E - Reverberation preamplifier. Uses two Hammond reverberation units in double scatter system. Frequency response of reverb circuit 50-7kHz i 8 dB. Input impedance 1 Mohm. Output impedance 100k ohms. Unit designed to be connected between preamp and power amp or in tape monitor circuit. Power switch and reverberation strength control. Four tubes, 2 diodes. Size 4x13/4x8/4 in. Wt. 13 lbs. 110-220 volts. Metal cabinet.

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1. Kenwood KM-8002 - Solid state stereo power amplifier. Power output 55 watts RMS per channel into 8 ohms (both channels driven) with 0.3 per cent harmonic distortion at any frequency 20-20kHz. Frequency response 20-50kHz. IM distortion 0.3 per cent. Input impedance 50k ohms, load impedance 4-16 ohms. Outputs for two sets of remote speakers. Front panel headphone jack. Speaker phase-reverse switches. Any/all/ phones speaker switch. Low frequency filter. Size l&tx&AxWA in. Wt. 23 lbs. 110-220 volts.
2. Kenwood KA-3344 - Solid state 4-channel decoder/rear-channel amplifier. Matrix decoder plus stereo amplifier to drive rear channel speakers. Power output 10 watts RMS per channel into 8 ohms (one channel driven) with 0.9 per cent harmonic distortion. Frequency response 25-30kHz ±2 dB (aux input). Load impedance 4-16 ohms. Defeat-able loudness circuit. Master volume control. Unit has built-in electronic crossover circuit for use with multi-channel speaker system. Front panel headphone jack. Size 1 &A xA-}A x 12 in. Wt. 16/2 lbs. 110-220 volts.
3. Kenwood KN-7044 - Solid state 4-channel decoder/preamplifier. Handles discrete 4-channel, matrix 4-channel and has circuit to create 4-channel effect with stereo material. Frequency response 20-20kHz ±1 dB. S/N ratio 70 dB. Input impedance 30k ohms. Output level 1 volt. 4-channel effect created by variable reverberation circuit. Individual 4-channel balance controls plus main volume control. Four VU meters and meter range control. Size 19V2 x5]A x103/4 in. Wt. 16 lbs. 110-220 volts.
4. Kenwood KA 8044 - Solid state 4-channel decoder/control amplifier. Four channel amplifier has power output of 22 watts per channel into 8 ohms (one channel operating). Frequency response 15-50kHz t 1 dB (aux input) at 1 watt. Harmonic distortion 0.3 per cent. IM distortion 0.5 per cent. Hum and noise -65 dB (phono input). Matrix decoding system plus reverberation circuit to create 4-channel effect. Individual volume and tone controls for each channel plus master volume control. Four VU meters with meter range switch. Defeatable loudness circuit. Front panel headphone jack, microphone jack and mic mixer. Size 18x1 5'/2 x13 in. Wt. 22 lbs. 110-220 volts.
5. Kenwood KF 8011 - Solid state stereo dynamic noise filter. Electronically changes degree of noise filtation depending upon strength of input signal. Frequency response without filters 10-80kHz ! 0.5 dB. Harmonic distortion 0.09 per cent. Hum and noise -75 dB. Input impedance 50k ohms, load impedance 1k ohms. Four selectable filtration frequencies 3.5k, 5.5k, 8k and 12kHz. Noise reduction 0 dB with 0 dB input level, 15 dB with -50 dB input level. Dual VU meters. Tape monitor switch. Size 1 &A x5x11 in. Wt. 14 lbs. 110-220 volts.
6. Kenwood KC-6060 - Solid state audio test unit with oscilloscope. Frequency response of oscilloscope amplifiers 3-200kHz, input impedance 250k ohms. Sweep frequency 10-100kHz with internal synchronization. Internal 1kHz oscillator for test signal. Connections for testing, stereo display and multipath display. Size 16'/< x5x11 in. Wt. 17 lbs.

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1. Pioneer SC-700 - Solid state stereo preamplifier. Frequency response 10-60kHz i 1 dB. Harmonic distortion 0.05 per cent, hum and noise -80 dB (phono input, IHF). Recommended load impedance 20k ohms. Front panel jack for low-impedance headphones. Speaker muting switch. Five inputs (2 phono). Maximum output voltage 4 volts. Size 1 iy4x4l/2x10 in. Wt. 13 lbs. 110-220 volts.
2. Pioneer SM-700 - Solid state stereo power amplifier. Power output 27 watts per channel into 8 ohms (both channels driven) with 0.05 per cent harmonic distortion. Frequency response 15-60kHz ^0.5 dB. Hum and noise -100 dB. Input impedance 65k ohms, output load 4-16 ohms. Center channel output. Remote speaker output. Speaker phase switches, input level selector and remote speaker switch. Size 113/4x4x10 in. Wt. 15 lbs. 110-220 volts.
3. Pioneer QlM-800 - Solid state 4-channel power amplifier. Power output 25 watts RMS per channel into 8 ohms (four channels driven). Harmonic distortion 0.5 per cent. Frequency response 10-50kHz. Four VU meters with meter range switch. Input level control. Load impedance 4-16 ohms. Size 17x5V4x13/4 in. Wt. 26 lbs. 110-220 volts.
4. Pioneer QC-800 - Solid state 4-channel preamplifier. Frequency response 10-70kHz I 1 dB. Output voltage 4 volts. Matrix and phase-type decoding networks. High and low frequency filters. Individual channel volume controls plus master gain control. Two tape monitor circuits. Speaker muting switch. Five inputs (2 phono). Front panel headphone jacks. Size 17x5V4x13'/4 in. Wt. 17 lbs. 110-220 volts.
5. Pioneer QL-600 - Solid state 4-channel decoder/rear-channel amplifier. Handles discrete 4-channel, matrix decoder and phase decoder. Inputs for stereo and 4-channel tape recorders. Power output 10 watts RMS per channel into 8 ohms (both channels driven). Harmonic distortion 0.5 per cent. Power bandwidth 20-20kHz (IHF). Individual volume controls for four channels plus master gain control. Size 17x53 in. Wt. 17 lbs. 110-220 volts.
6. Pioneer SR-202W - Solid state stereo reverberation preamplifier. Frequency response 20-35kHz + 2 dB, harmonic distortion 0.2 per cent, hum and noise -65 dB. Output voltage 330 mV into 10k ohms. Reverberation time 0 to 2.5 sec. Input impedance 300k ohms. Record playback connections for two tape recorders. Unit designed for connection in tape monitor circuit of amplifier. Size 13x5'/2 x10'/2 in. Wt. 13 lbs.
7. Pioneer SF-700 - Solid state stereo electronic crossover. Designed to be connected in front of power amp and used to divide audio spectrum for bi-amp or tri-amp speaker system. Input impedance 100k ohms, recommended load impedance 20k ohms. Harmonic distortion 0.3 per cent. Selectable cut-off slope rate of 6, 12 or 18 dB per octave. Selectable low frequency crossover (125, 250, 500, 700 and 1 kHz) and high frequency crossover (1k, 2k, 4k, 6k and 8kHz). Center channel output. Size 11 % x4/2 x10 in. Wt. 12 lbs. 110-220 volts.
8. Pioneer SD-1000 - Solid state audio test unit with oscilloscope. Oscilloscope amplifier frequency response 5-250kHz -3 dB. Input impedance 190k ohms. Internal synch with 10-100kHz sweep range. Internal test oscillator with 20-20kHz range and auto-sweep mode which automatically sweeps from 20 to 20kHz every 25 seconds. Front panel microphone jack and mic preamplifier for acoustic measurements. Connections for FM multi-path display. Size 17x5/4 x133/< in. Wt. 20 lbs. 110-220 volts.

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1. SAE Mark Nine - Solid state stereo preamplifier/equalizer. Frequency response 10-100kHz I 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 62 dB (phono), 20 dB (aux input). Maximum output voltage 18 volts (hi-Z). Output impedance 600 ohms. Five controls vary response ! 16 dB at peak frequencies (80, 320, 1280, 5k and 15kHz). Four inputs (2 phono). Tape monitor circuit. Front panel headphone jack.
2. SAE Mark One - Solid state stereo preamplifier/equalizer. Frequency response 10-100kHz (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 62 dB (phono), 20 dB (aux input). Maximum output voltage 18 volts (into Hi-Z). Output impedance 600 ohms. Two microphone inputs. Front panel headphone jack. Gain selector. Tape recorder dubbing circuit. Equalizer section provides !:.15 variance in one low frequency (60, 120, 220 or 320) and one high frequency (2.5k, 5k, 10k or 15kHz). Size 17x10/2 x5V< in. Wt. 18 lbs.
3. SAE Mark Four-B - Solid state stereo power amplifier. Power output 60 watts RMS per channel into 8 ohms (both channels driven) with 0.1 percent harmonic distortion at any frequency 20-20kHz. Frequency response at 60 watts 20-20kHz I 0.1 dB. Hum and noise -100 dB. IM distortion 0.1 per cent. Input impedance 100k ohms. Front panel level controls. Size 17x13V4x53/4 in. Wt. 32 lbs.
4. SAE Mark Two-B - Solid state stereo power amplifier. Same as SAE Mark Four B except 90 watts RMS per channel. Wt. 43 lbs.
5. SAE Mark Three-A - Solid state stereo power amplifier. Same as SAE Mark Four-B except 120 watts RMS per channel. Wt. 43 lbs.
6. SAE Mark Three - Solid state stereo power amplifier. Power output 120 watts RMS per channel into 8 ohms (both channels driven) with 0.1 percent harmonic distortion at any frequency 20-20kHz. Frequency response 20-20kHz ±0.1 dB at 120 watts. Hum and noise -100 dB, IM distortion f 0.1 per cent. IHF power bandwidth 8-50kHz. Input impedance 100k ohms. Dual VU meters with meter range controls. Front panel level controls. Dual power supplies. Size 17x15x 53/4 in. Wt. 45 lbs.
7. SAE Mark Seven - Active audio (stereo) equalizer. Eleven controls vary response ! 16 dB at peak frequencies (40, 80, 160, 320, 640, 1280, 2.5k, 5k, 10k, 15k and 20kHz). Unequalized frequency response 20-20kHz ±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.

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1. Sansui BA-60 - Solid state stereo power amplifier. Power output 20 watts RMS per channel into 8 ohms with 0.3 per cent harmonic distortion. Frequency response 20-60 kHz ±1 dB at 1 watt. IHF power bandwidth 20-40kHz. IM distortion 0.3 per cent, hum and noise -80 dB. Null balance circuit. Phase reverse switches. Individual level controls. Size 4'/2 x6x10V2 in. Wt. 10 lbs. 110-220 volts.
2. Sansui BA-90 - Solid state stereo power amplifier. Power output 28 watts RMS per channel into 8 ohms with 0.3 per cent harmonic distortion. Frequency response 15-100kHz ±1 dB at 1 watt. IM distortion 0.3 per cent, hum and noise -80 dB. Input impedance 100k ohms. Load impedance 4-16 ohms. Individual level controls, null balance circuit, variable damping factor and phase reverse switches. Front panel headphone jack. Size 4'/2 x7'/2 x1474 in. Wt. 17 lbs. 110-220 volts.
3. Sansui QS-1 - Solid state 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 20-20kHz ±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 5x15V4 x11 in.Wt. 13 lbs. 110-220 volts.
4. Sansui QS-100 - Solid state 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 20-50kHz < 1 dB at 1 watt. IHF power bandwidth 25-40kHz. Hum and noise -80 dB, IM distortion 1.0 per cent. 4-channel section handles discrete sources, has matrix decoder and 4-channel effect circuit. Remote output for extra set of rear speakers. Four VU meters. Tape monitor circuit. Size 10x5x11 in.Wt. 11 lbs. 110-220 volts.
5. Sansui QS-500 - Solid state 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 20-50kHz ±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.
6. Sansui RA 500 - Solid state stereo reverberation preamplifier. To be connected in front of power amp or in tape monitor circuit. Frequency response 20-30kHz ±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 6l/2x12x10l/a in. Wt. 12 lbs. 110-220 volts.
7. Sansui ECA-3 - Solid state 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 20-60kHz t1 dB at one watt. IM distortion 0.3 per cent, hum and noise -80 dB. Load impedance 4-16 ohms. 110-220 volts.

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1. Shure M64 - Solid state stereo preamplifier. Compact phono/mic/tape head preamplifier. Frequency response 20-20kHz +2 dB. Switchable equalization for phono and tape. Harmonic distortion 1.0 per cent. High and low level outputs. Size 5V2 x2'/2 x4'/2 in. Wt. 2 lbs. 110 volts.
2. Shure M64-2E - Same as Shure M64 except 220 volts.
3. Shure M688 Mixer - Solid state stereo microphone mixer. Frequency response 40-20kHz i 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 2l/a x11'/2x7 in. Wt. 5 lbs. 120 volts ac or 30 volts dc.
4. Shure M63 Audio Control Center - Compact monaural preamplifier/ equalizer. Frequency response 20-20kHz±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. Size11'/2 x2'/2 x 5'/4 in. Wt. 4 lbs. 120 volts ac or 30 volts dc.
5. Shure VA-302E - 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 50-10kHz ±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 10-in woofers and four 8-in tweeters. Size: speaker column 623/4x153/4x83/4 in, amplifier 8,/2x25x143/4 in. Total system wt. 111 lbs. 220 volts.

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1. Sony TA-2000 - Solid state stereo preamplifier. Frequency response 20-100kHz -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 low frequency filters. Tape monitor circuit. Dual VU meters. Size 153/4x53/< x12% in. Wt. 20 lbs. 110-220 volts.
2. Sony TA-3200 - Solid state 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 20-20kHz. Frequency response 5-200kHz -2 dB. S/N ratio 110 dB, IM distortion 0.1 per cent. Remote speaker outputs. Two inputs. Individual level controls, input selec-torand powerlimiterswitch.Size15Y4x6x12V4 in. Wt. 31 lbs. 110-220 volts.
3. Sony TA-2240 - Solid state 4-channel control unit and stereo preamplifier. Two channel preamplifierto be used in conjunction with external stereo preamplifier to provide 4-channel system. Frequency response 10-100k Hz-2 dB. Harmonic distortion 0.1 percent, IM distortion 0.2 per cent. Output voltage 1V. Has air-tube delay circuit to create 4-channel effect with stereo material. Variable delay times. Tape monitor circuit. Front panel headphone jack. Individual volume controls for each channel plus master gain control. Size 15/2x5V4x12V4 in. Wt. 18 lbs. 110-220 volts.
4. Sony TA-2244 - Solid state 4-channel preamplifier. Frequency response 10-100kHz -2 dB. Harmonic distortion 0.1 per cent, IM distortion 0.2 per cent. Output voltage 1V. Has air-tube delay circuit to create 4-channel effect with stereo material. Variable delay times. Tape monitor circuit. Inputs and outputs for 4-channel tape recorder. Front panel headphone jack. Individual volume controls for each channel plus master gain control. Size 'WAxb^Yte'/* in. Wt. 18 lbs. 110-220 volts.
5. Sony TA-4300 - Solid state stereo electronic crossover divider. Divides input material into three bands for use in tri-amp speaker system. Harmonic distortion 0.1 per cent. S/N ratio 80 dB. Maximum input voltage 3.5V. Selectable crossover frequencies for low band (150, 250, 400 and 600 Hz) and for high band (3k, 4k, 5k and 6.5kHz). Output impedance 5k ohms. Bass boost circuit. Individual volume controls for each band in each channel. Size 6x11 '/2 x6'/2 in. Wt. 7 lbs. 110-220 volts.

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1. Soundcraftsman Model 20-12 - Solid state stereo equalizer. Frequency response (without equalization) 20-20kHz i 0.5 dB. Harmonic distortion 0.1 per cent. IM distortion 0.1 per cent. S/N ratio 65 dB (unweighted). Input impedance 100k ohms. Ten controls for each channel to vary response ±12 dB at peak frequencies (30, 60,120, 240, 480, 960, 1920, 3840, 7680 and 15,360 Hz). Output level of each channel individually adjustable. With walnut finish wood case. Size 5x173/4x11 in.

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1. Teac AE-200 - Solid state stereo power amplifier. Power output 50 watts RMS per channel into 8 ohms. Harmonic distortion 0.1 per cent. Frequency response 20-80kHz -1 dB at 50 watts. Hum and noise -100 dB. IM distortion 0.5 per cent. Input impedance 22k ohms, input sensitivity 0.7V. Level, phase and balance check controls. Size 8'/4 x5'/2 x13 in.Wt. 16 lbs.
2. Teac AN-50 - Solid state stereo noise reduction unit. Utilizes Dolby B-type system to reduce noise incurred in tape recording. Frequency response 20-15kHz ±1.5 dB. Harmonic distortion 0.3 per cent. S/N ratio 65 dB. Input impedance 35k ohms, output level 1V. Built-in multiplex filters and tone oscillator. One Dolby circuit for each channel.
3. Teac AN-80 - Solid state stereo noise reduction unit. Utilizes Dolby B-type system to reduce noise incurred in tape recording. Specifications same as Teac AN-50. Size 3'/2x15x10V4 in. Wt. 9 lbs.
4. Teac AN-180 - Solid state 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 20-15kHz ±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 1kHz, 10 dB at 10kHz. Output level 1V. Dual VU meters. Size 572 x16x12Y4 in. Wt. 16 lbs.
5. Teac AZ-200 - Solid state audio performance indicator. Oscilloscope-type unit which displays audio and multipath patterns for observation. Front panel controls for level and function. With wood case. Size 8'/4 x5'/2 x 11'/2 in.Wt. 13 lbs.

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