Biamp 601 - Manual (Page 5)

3
REAR PANEL
DC Power Supply: The included power supply module provides 24 Volt DC power to the mixer. It is connected to the DC Power Jack on
the rear side of the mixer. To ensure compatibility, only use a Biamp Systems’ supplied power supply.
Main Out: These three terminals provide the electronically balanced Main Out from the mixer, wired with high to (+), low to (-), and ground
to (
d ). For unbalanced output, connect high to (+) and ground to ( d ), leaving low (-) unconnected. Main Out signal is a mix of the input
channel signals, plus signal from Stack In, as well as any processing which may be inserted at Patch (see Stack In & Patch below).
Stack In: These three terminals provide a line level input for signals from external devices, such as other mixers. Stack Input signal is
combined with the channel signals, before being sent to the Main Out section. Connect balanced inputs with high to (+), low to (-), and
ground to (
d ). For unbalanced use, connect inputs with high to (+) and ground to both (-) & ( d ).
Patch: These three terminals provide an insert point for connection of external processing equipment at the Main Out section. Patch is
post-EQ (Bass & Treble) and pre-Master Level. The (out) terminal provides a send to the external device. The (in) terminal provides a
return from the external device Ground for both connections is supplied by the (
d ) terminal. Patch may also be used as an unbalanced,
pre-Master Level output, with the (out) terminal as the send and the ( d ) terminal as ground. Depress the Patch Enable switch only when
Patch is used as an insert, and release the Patch Enable switch when Patch is used as an output (see Enable Switches below).
Remote: These three terminals allow remote control of the Main Out level. Remote controls can be level pots and/or mute switches.
Controls may be wired up to 2000 feet from the mixer, using 2-conductor shielded cable (see Remote Control on page 4). Potentiometers
should be 5k~50k ohms (linear taper). Switches may be used alone (on/off) or with variable resistors (adjustable mute). An external ramp
voltage may also be used. Depress the Remote Enable switch only when using remote controls (see Enable Switches below).
Enable Switches: These switches activate the normal functions of the Patch & Remote terminals (see above). Patch terminals may still
be used as an unbalanced output even when disabled. Remote terminals do nothing unless enabled. If Remote is enabled, but no control
is connected, signal will be muted (off) at the Main Out.
Ch 3 / Ch 6 Duck switches: These DIP switches assign which input signals (Channels 1 & 2 on 301; Channels 1~5 on 601) will
automatically trigger ducking (-15dB attenuation) on the last channel (Channel 3 on 301; Channel 6 on 601) for talk-over applications.
Phntm Switches: These switches assign +24V Phantom Power to the Inputs (for condenser mics). Do not assign Phantom Power for
inputs other than condenser mics. Always turn Channel Level controls down before switching Phantom Power.
Inputs: These terminals provide electronically balanced input to the channels, and will accept either microphone or line-level signals.
Connect balanced inputs with high to (+), low to (-), and ground to (
d ). For unbalanced use, connect inputs with high to (+) and ground to
both (-) & ( d ). Phantom Power is available for operation of condenser microphones (see Phntm Switches above).
Pad Switches: These switches reduce the channel input signal level by 30dB. Depress this switch when channel input signal levels
exceed the normal operating range of the front panel Trim control. Pad is typically released for mic input and depressed for line input.