Gain Make-Up.
Up to 20dB of gain make-up may be applied, to retain the subjective loudness of the signal.
Bypass.
The Compressor In switch allows the processing to be bypassed for comparison of the compressed signal
(with any gain make up that has been applied), with the original signal.
Stereo Operation.
In normal 2 channel operation, the controls operate independently for each channel. However, operation of
the STEREO LINK switch will cause the compressor to be set for full stereo operation, where the
Threshold, Attack, Release and Ratio controls for channel A control both channels. The input gain and gain
make-up controls remain separate to allow relative input/output gain balance adjustment.
In stereo mode, the control voltages are also linked, ensuring that the same amount of gain reduction is
applied to both channels (even if one signal is below the threshold). This ensures that the stereo image is
preserved.
Bargraph Meters.
The compressor is equipped with twin, LED bargraph meters. These meters normally monitor the audio
output from the unit, and are calibrated for nominal level of +4dBu at the balanced output = 0dB. Similarly,
0dB on the meters also corresponds to -10dBu at the unbalanced output. The reference point may be
internally adjusted by your dealer if required. The output level scale is printed between the two bargraphs,
and applies to both channels.
The meters may be switched to indicate the amount of compression applied to the signal, by operating the
GAIN RED’N switch. If the signal is below the threshold, the meters will not illuminate: i.e. no gain
reduction is occurring. As the signal passes through the threshold the 0dB LED will illuminate, indicating that
gain reduction has started. For further increases in input level, the meter will indicate the gain reduction
occurring at the compressor stage. Note that the gain reduction indicated is a measure of the degree of
compression, and does not include any gain make-up applied. The gain reduction scale is printed beneath
the meters, and also applies to both channels.
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