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Connecting to the Audio Interface
You can switch b4dBu and –10dBV for each individual input and output
via the console software (see section below). There are also two channel inserts on
the rear panel where you can connect a serial effects device (compressor, EQ, etc.)
for the universal inputs (#s 1 – 2). The channel inserts are wired: tip = send, ring =
return, and sleeve = ground.
Universal Inputs – AudioFire8
The universal input connections can accept balanced or unbalanced signals via ¼”
or XLR connectors. Since AudioFire8 has built-in preamps, you can just plug your
microphone or guitar cable right into the universal input. No external preamp,
direct box, or mixer is needed!!
To use a microphone, plug the microphone’s XLR cable into any of the universal
inputs. Whenever an XLR cable is connected to a universal input, the microphone
preamp is enabled and the gain range of the trim knob is set to range from +10 to
+59dB. The input impedance of each microphone preamp is 1.5Kohms. Full-scale
input is 9dBu with the trim set to minimum gain.
AudioFire8 provides 48 volts of phantom power for microphones that require it. To
enable phantom power, press the button l48v (the LED next to it will light
up) and phantom power will be provided to all microphone inputs.
Note:
Phantom power will not be applied to any line level equipment or
guitars plugged in using cables with ¼” connectors.
To record a guitar or line level signal, just plug a cable with a ¼” connector into
one of the universal inputs. Whenever a ¼” cable is connected to a universal input,
the guitar/line preamp is enabled and the gain range of the trim knob is set to range
from 0 to +45 dB. The guitar/line preamp can support both guitar & line level
signals. The input impedance of each guitar/line preamp is 102Kohms. Full-scale
input is 18dBu with the trim set to minimum gain.
If you want to adjust the input level of a universal input, just turn the trim knob and
watch the corresponding level meter. The red light at the top will light anytime the
input signal is greater than –6.5dBFS (or within 6.5dB of clipping). The yellow
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Connecting to the Audio Interface
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