Connecting to the Audio Interface
18
Connecting to the Audio Interface
The rear panel has universal inputs 3 – 8, line outputs 1 – 8, 2 channel inserts,
MIDI i/o, S/PDIF i/o, ADAT i/o, BNC WordClock connectors, and two FireWire
connectors.
AudioFire Pre8 Analog Inputs 1 – 2 Microphone and Line Buttons
Analog inputs 1 – 2 each have 6 associated buttons: Phase, 80Hz, Pad, LoZ, DI and
+48V (phantom power).
Microphone buttons:
Ø (Phase): Inverts the polarity of the signal. Useful for miking drums, etc.
80Hz: Turns on an 80Hz high pass filter to reduce low frequency rumble and
hum.
Pad: Reduces the preamp gain by 20dB to accommodate large microphone
or line level signals connected via XLR.
LoZ: Reduces the microphone preamp input impedance from 3,000 ohms to
1,000 ohm. Some microphones are designed to drive a lower
impedance and will sound better when this switch is on.
+48V: Turns on phantom power.
Line button:
DI: Direct input. Increases the 1/4" input impedance from 12,000 ohms to 1
meg ohm. Useful for connecting electric guitars or other instruments
needing a high input impedance. Should only be used with mono plugs.
