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Balanced - LINE/MIC Input 1
Input 1 is compatible with balanced telephone/line-level signals and
microphone-level signals. Wiring for balanced MIC and balanced line
signals are the same with the positive signal line going to “+”, the negative
going to “-” and the cable’s shield going to G. The + and - designations refer
only to the phase of the signal, so even if the + and -
connections were reversed, the amp would still work fine. See the
Operation section for details on setting the associated switches. This
input has the ability to mute Input 2 when active depending on the setting
of the Mute Send switch.
Unbalanced Input Wiring
Input 1 can be wired to accept mono unbalanced signal sources. Configure
a balanced input for unbalanced use by shorting the G terminal to the “-”
with a small jumper wire. The unbalanced signal’s hot lead is then wired to
the “+” terminal and the shield is connected to the G terminal.
AUX Input 2
Input 2 is a stereo-combining input, compatible with unbalanced line-level
(AUX) signals. This input may be muted by audio activity at Input 1
depending of setting of Mute Send switch.
24V DC IN
The amplifier can be powered by an external power source that can
supply 24V DC and at least 3 amps of current. Wire the power source to
the terminals observing the polarities marked on the terminals.
Speaker Outputs
The amplifier’s speaker output terminal strip provides connections for
70V and 25V speaker systems, as well as low-impedance speakers
loads of 4- or 8-ohm impedance. Connect one end of the speaker load
to the COM terminal and the other side of the load to the terminal corre-
sponding to the type of system being driven (transformer-coupled
70/25V speaker or low-impedance speakers without transformers).
REC Output
This set of RCA connectors provide a signal-level output of the program
material provided to the speaker. Both outputs supply the same mono
signal (not stereo). This signal is suitable to drive recording devices or
another amplifier. This output is after the Bass and Treble controls.
Output Connections
Input Connections
JUMPER
HOT
SHIELD
