Operational Mode Selector -
Choose one
of three settings to meet application
needs: 70V Mono, Dual Mono, or Stereo.
70V Mono provides one channel of 70V
constant voltage output with the two
modular inputs combined in a 2:
1 mixer.
Dual Mono provides 2 identical channels
of low-impedance power with modular
inputs combined in a 2:
1 mixer.
Channel Balance Control
(in
Dual Mono operation mode)
-
Allows the output level of one
channel to be lower than the
other channel’s output level.
Effects Loop -
Provides insert point
for outboard signal processing
equipment when the amplifier is
in either 70V Mono or Dual Mono
modes (modular inputs are in a
2:
1 mixer configuration).
(Not used in stereo mode.)
Output Feeds -
In mono modes,
the connectors provide output
signal feeds both before and after
any outboard signal processing.
In stereo mode, the Pre-EQ
connector provides mono mix
output of the stereo input signal.
Status Indicator -
Green
–
On/Normal Operation
Amber
–
Sleep Mode
Red
–
Protect (DC, Thermal, Overload)
Signal Indicator -
Indicates audio signal is present.
Clip Limit Indicator -
Lights amber
when amp enters clipping and limiter
circuit activates or when there are
excessively low impedance loads.
Cooling Fans -
Two independent,
variable-speed fans respond only
as needed to keep the amplifiers
cool which reduces dust build-up.
Removable Fan Grilles -
Secure, but easily removable
for filter cleaning.
Power Switch -
High-quality,
magnetic circuit breaker.
Recessed Volume Control
(shown with cover removed)
-
20-position, detented volume control, one for each channel. They are
recessed in the cast aluminum front panel and are protected from
casual tampering by a snap-on knob cover
(not shown)
.
70V Speaker Output -
For 70V constant voltage speaker
systems. Provides a single channel
of amplification.
Low-Impedance Outputs -
For 4- to 8-ohm speaker
loads. Unit works into
loads as low as 2 ohms
without overloading.
Module Bay -
The unit can accept one or
two Bogen input modules. Each amplifier
comes with a balanced, high-impedance
stereo input module.
Sleep Defeat -
Turns off the
power-saving
sleep mode.
Angled Front Panel -
The top of the front
panel is angled slightly, allowing easy removal
of the knob cover and also allowing two units
to be stacked on top of each other without
empty rack spaces between them.
Lo-Cut Filter Switch -
Select a low-frequency
roll-off of 65Hz or 125Hz for transformer
coupled and horn speakers. Flat position
allows full low-frequency performance.
FRONT PANEL
REAR PANEL
M-CLASS
