C/M Laboratories, pioneers in the design and manufacture of solid state amplification equipment, is constantly evaluating and developing ideas to increase fidelity and realism in sound reproduction to the highest level that the state of the art will allow.

To this end, C/M Laboratories constantly tests traditional methods and rules-of-thumb against present technology. New standards evolve; old ones revised. New measurements are made to describe new performance factors. A generation of amplifiers is born having improved operational characteristics.

In the use of this new breed of power amplifiers, it has been found that the bi-amplification concept becomes increasingly more advantageous than has been in the past. The bi-amplification system is a system which amplifies high and low frequencies separately through individual amplifiers and feeds the respective signals directly through to the loudspeakers bypassing the conventional cross-over network. This system reduces cross-modulation distortion between high and low frequencies in a single amplifier and improves both phase and amplitude control over the loudspeakers by the total utilization of the much higher damping and peak powers now available in more recent high quality solid state amplifiers.

The resulting spaciousness in the sound quality is caused by increased clarity combined with a much better definition in the placement of instruments heretofore not possible with conventional cross-over networks. An integral part of the bi-amplification system is the electronic cross-over network which separates the frequencies prior to power amplification.

C/M Laboratories now makes available the Model 601 Electronic Cross-over Network which has been designed to cover any cross-over frequency from the requirements of the super woofer to the super tweeter in the range of 100 Hz to 12.7 Khz with 127 switch selections in 100 Hz increments. Level controls allow relative adjustment between high and low pass amplifiers to equalize efficiencies of the respective loudspeakers. Modular in concept, two Model 601's may be cascaded to provide either steeper cross-over slopes or three-way outputs for tri-amplification systems.