Crown Audio P.I.P.-PA - Manual (Page 4)

P.I.P.–PA
Page 4
❏ Phantom power provided for
mic inputs (can be disabled).
❏ Low-frequency filters for mic
inputs (can be disabled).
❏ Variable-threshold error-driven or
audio feedback signal-driven
compressor.
❏ Balanced RFI suppression is
provided at each input.
❏ Gold plated edge-connector
for trouble-free connection to
amp.
❏ Quick-connect barrier con-
nectors provide greater wir-
ing flexibility and make instal-
lation easier.
2 Facilities 2 Facilities 2 Facilities 2 Facilities 2 Facilities
A. Low-Cut Filter Jumper
A 150-Hz, 6-dB/octave low-cut fil-
ter is provided for each mic input
only. (It has no effect upon the
line-level input.) It can be used to
attenuate unwanted pops and
noise which microphones some-
times pick up. The filter of either
channel can be enabled or dis-
abled with the jumpers shown.
The on/off positions of the jump-
ers are labeled on the circuit
board.
B. Compressor Threshold
The threshold of each channel’s
compressor can be adjusted with
these controls. When turned to
their maximum setting (full clock-
wise), the compressors respond
only to the IOC error-signal of their
respective channel. When set
lower, the compressors are sig-
nal-driven by an audio feedback
signal.
C. Phantom Power Jumper
Phantom power (+18 VDC at 9
mA) is provided to the mic inputs
when these jumpers are set to
their “on” position. The on/off po-
sitions of the jumpers are labeled
on the circuit board.
D. Ground Isolation
Jumper
The input grounds can be iso-
lated from the chassis ground by
removing this jumper.
E. Balanced Line Input
Line-level connection is made with
these convenient quick-connect
barrier connectors. Each conduc-
tor is easily attached with screws.
Once the cable is attached, the
connector can be quickly un-
plugged and, if desired, moved to
a different line input.