Peavey VSX II Manual page 5

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F F R R O O N N T T P P A A N N E E L L
( ( 1 1 ) ) G G a a i i n n 1 1
Used to optimize the interface gain between the VSX II Channel 1 and the associated mixer. Control range is
-20 dB to +20 dB with Unity gain at center (detent) position. In mono MODE Gain 1 is the only channel gain
control.
O O p p e e r r a a t t i i o o n n N N o o t t e e
The default (0dB) setting (center detent on all controls) should be considered normal for many applications.
However, adjustments in the - (negative) direction will reduce system noise. Settings in the + (positive)
direction will improve headroom with mixers having output capability less than +22 dBu, at the expense of
added system noise.
In applications requiring low system noise, such as studios, churches, etc., and where headroom is not critical,
the noise level can be improved by operating the VSXII gain levels below 0 dB. Example: A setting of -6 dB will
reduce system noise by 6 dB. At the same time, system headroom will have been reduced by 6 dB. Such
"compromises" should be considered normal in noise sensitive applications.
System headroom can be substantially increased with the VSXII in applications where the mixer output is less
than +22 dBu. To accomplish this, the optimum gain setting will usually be the difference between the VSXII
output rating (+22 dBu) and the mixer output rating. Example: If the mixer output rating is +14 dBu, the VSXII
gain should be set at +8 dB (22–14 = +8 dB). If the mixer output rating were 22 dBu, the correct setting would
be 0dB. For mixers with output capability at +22 dBu or higher, gain settings above 0 dB will not improve
headroom but will increase system noise.
( ( 2 2 ) ) L L o o w w C C u u t t F F i i l l t t e e r r ( ( L L C C F F 1 1 ) )
Provides a 24 dB per octave roll-off at 40 Hz to reduce subsonic rumble and to protect the low speaker from
operating below its cut-off frequency. Affects both, the Low and High frequency bands. When not engaged, the
low-end roll-off frequency is below 10 Hz.
( ( 3 3 ) ) L L o o w w 1 1 P P o o l l a a r r i i t t y y S S w w i i t t c c h h
When engaged reverses the polarity of the signal in the Low frequency band to speed up trouble shooting and
assure proper phase response of the audio system.
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