Drawmer 1960 Mic-Pre/Tube Compressor - Manual (Page 9)

1960 OPERATORS’ MANUAL 7
Stereo Link: Averages the left and right channel control settings
when the unit is used for processing a stereo signal.
The same degree of gain reduction is applied to both
audio channels to prevent image shifting which
would otherwise occur whenever the left and right
signal dynamics varied from each other by any
significant degree.
MICROPHONE PRE-AMPLIFIER
Mic Input Gain: This fully variable control sets the mic input gain over the
range 0 to 60dB. The adjacent Clip LED illuminates when
excessive Mic gain has been applied and there is a danger
of clipping.
AUXILIARY INPUT
The Auxiliary Input has a 2M2Ù impedance and feeds a specialised instrument input
stage which provides both gain and equalisation, suitable for use with both active and
passive guitar pickup systems as well as with electronic keyboards. The passive Bass
and Treble controls are based on those used in classic tube guitar amplifiers while the
Bright switch puts a peak in the frequency response at around 2kHz to simulate the
voicing of a typical guitar amplifier. A two position high or low gain switch provides an
additional 10dB of gain when required for level matching or for creating overdrive
effects.
W hen setting up a good starting point is to switch Bright 'On' and set the compressor for
'Med' attack and '6' release. The threshold should be adjusted to give a gain reduction
reading of around 5dB on signal peaks. By increasing the Gain control setting, the input
stage can be made to overdrive in a manner similar to that of traditional valve guitar
amplifiers.