The SC2.2 is best used when in a two track mix down, mastering and live performances but can be used as an effects compressor for tracking in mono. The compressor is a 2U mains powered rack unit with two linked channels. The inputs and outputs are dual standard Switchcraft XLR on the rear panel. No distortion producing voltage controlled amplifiers are used. Input impedance is 20Kohm resistive.
Compression adjusts the drive to the sidechain and sets the amount of compression.
Attack is a rotary control setting the attack time between .5 and 10 milliseconds. A characteristic of this photo-electric system is a predictable overshoot at very short attack times. This effect is useful on some program material and is impossible with other types of compressors. Release is a rotary control adjusting the recovery time of the compression. The pointer moves to the left to indicate the amount of gain reduction in effect.