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Revision C • 1/04
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2-16
2 Installation
digital
QUICK GUIDE TO THE MICROPHONE PREAMPLIFIER MODULE
The BMX
digital mic preamp contains two separate PCAs with five mic preamps on each board. The
BMX
digital-8 and -14 come standard with five mic preamps, whereas the BMXdigital-22, -30 and -38
come standard with ten mic preamps. Each 3-pin input connects to a separate mic preamp driving its
own 6-pin line-level balanced analog output connector. The connectors are hidden by the meter panel in
normal operation.
INPUTS
Inputs—
Inputs—
Inputs—
Inputs—
Inputs—
The 3-pin analog inputs accept mono microphone signals.
Connect only low impedance, balanced, dynamic or condenser
microphones, with nominal mic output levels of -65 to -30 dBu, to these
inputs.
OUTPUTS
Outputs —
Outputs —
Outputs —
Outputs —
Outputs —
The 6-pin analog outputs are wired in parallel (mono)
using the standard pinout sequence. This allows these outputs to connect
directly to Universal Input modules without requiring any setting changes
to be made to the Input Mode from a standard stereo input. The preamp
output signal level is +4 dBu.
Analog Mic Inputs
High (+)
Low (-)
Shield
(wire insertion end view)
3
2
1
Analog Preamp Outputs
Right High (+)
Right Low (-)
Shield
Left High (+)
Left Low (-)
Shield
3
2
1
6
5
4
(wire insertion end view)