Chapter 4: Mic Preamps and Control 24 Outputs 37
To connect an instrument-level signal:
1 Turn the level control all the way down
(counter-clockwise) as a safety precaution.
2 Connect your Instrument source to the unbal-
anced 1/4” input jack on the rear of Control 24
labeled DI 1 or DI 2.
3 Push the Source button until the Instrument
LED lights.
4 Adjust the level control.
Phantom power is switchable in banks of eight
microphone preamps. Turn off phantom power
before connecting or disconnecting any micro-
phones, and consult manufacturer’s documen-
tation for condenser microphones.
To connect a microphone-level signal:
1 Turn the level control all the way down
(counter-clockwise) as a safety precaution.
2 Connect your microphone or microphone-
level source to the balanced XLR input jack on
the rear of Control 24 that corresponds to your
preamp number (1–16).
3 If phantom power is not already activated for
the bank of preamps you are using (either 1–8 or
9–16), push the bank’s switch on the rear of
Control 24.
4 Push the Source button until the Mic LED
lights.
5 Adjust the level control.
Preamp Operation and
Specifications
The gain range of each preamp when the source
is set to MIC is from 0 to +60 dBu. Select dB
range values are labeled around the pot.
The gain range when set to DI (first 2 channels
only) is 0 to +40 dBu. These values are displayed
around the pot and are enclosed in parentheses.
The gain range when the source is set to the line-
level input is –10 to +10 dBu. These values are
displayed around the pot and are enclosed in pa-
rentheses.
High-Pass Filter Specifications
and Use
The high-pass filter on each channel is a fixed
frequency (75 Hz – 12 dB/octave) device that is
most useful when trying to eliminate unwanted
low frequency rumble or noise from the record-
ing source. To activate the filter, simply press
the switch labeled HP FILTER.
DI inputs are only provided on preamp
channels 1 and 2.
Refer to manufacturer’s documentation for
proper use of phantom power with con-
denser microphones.
It is possible (although unlikely) that phan-
tom power can damage certain kinds of rib-
bon or dynamic microphones, and should
always be used with care on any condenser
microphone that requires it.
Control_24.book Page 37 Wednesday, January 17, 2001 2:51 AM
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