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Operating Manual - PQX 571 and PQX 572 Parametric Equalizer
5.3 High Shelving Filter (Filter No. 7)
These concentric controls work the same way as
the low shelf controls described in (1) and (2) except the
filter response starts at the center frequency selected and
continues up in frequency.
5.4 Master Level
The overall gain of the equalizer is adjusted by
this control. The master level gain stage is placed prior
to any filter stages so that increasing the master level will
not amplify filter noise. If the Master EQ switch is out,
the level control has no affect. Signals are then simply
routed through the equalizer at unity gain.
5.5 Clip Indicator
This red LED illuminates when an amplifier in
any of the filters comes within 3 dB of clipping, includ-
ing those filters which are not engaged. The maximum
signal level through the PQX equalizers is greater than
+22 dBu.
Parametric Filter Frequency Control
Parametric Filter Level Control
High Shelf Level Response
Parametric Filter Bandwidth Control