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P .I.P .–PA
1 Welcome
Thank you for purchasing the
Crown P.I.P.-PA accessory.
®
P.I.P.
modules are designed to
quickly install in the rear panel of
many Crown amplifiers. P.I.P.
stands for "Programmable Input
Processor." Their versatile fea-
tures expand the capabilities of
your amplifier and enable you to
customize it for your particular
needs.
The P.I.P-PA adds a switchable
balanced low-Z microphone in-
put and a balanced line-level in-
put to each channel of a Com-
®
Tech
or Macro-Tech
amplifier. A remote-control fea-
ture allows you to independently
switch between the mic and line-
level inputs of each channel.
Designed for paging and back-
ground music systems, the
switching circuitry has built-in
delays for pleasing, less abrupt
fades from mic to line and visa
versa.
The mic inputs are transformer
isolated and employ a variable
gain stage. The gain of each
Fig. 1.1 P.I.P.-PA
channel can be easily controlled
from the rear panel. Phantom
power is also provided via the
microphone connectors. It can
be disabled by moving a jumper
on the circuit board.
Bass roll-off for each mic input is
provided with a low-cut filter.
These filters roll off at 6 dB/oc-
tave and have a –3 dB frequency
of 150 Hz. They can be indepen-
dently disabled by moving a
jumper on the circuit board.
Finally, each channel includes a
variable-threshold compressor
which is IOC
®
series
maximum setting or acts as an
audio feedback signal-driven
compressor at less than maxi-
mum settings.
Features
®
error-driven at its
Remote switchable balanced
mic and line-level inputs with
custom mute-delay circuitry for
pleasing fades.
Balanced 1:1 isolation transform-
ers for mic inputs.
Adjustable mic input sensitivity.
Page 3
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