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.
