Modular Amplifier
The M-Class Series of amplifiers are mod-
ular amps that can accept up to two input
modules per unit. These modules offer a
cost effective and convenient way to add a
variety of features to a system. A balanced
line input module (BAL2S) is shipped with
each unit. See page 39.
Modes of Operation
Each model includes a 3-position switch
that can be set to one of three modes of
operation: Stereo mode, 70V Mono mode,
or Dual Mono mode.
• Stereo
In this mode, the amp supplies two inde-
pendent channels of low-impedance
amplification. These channels can be used
to supply left and right audio for stereo
installations of 2 separate zones of ampli-
fication with different audio programs.
• 70V Mono
In this mode, the amp supplies a single
channel of amplification. This mode also
mixes the signals from each input module
into a mono program. By assigning each
module to a different bus, a 2:1 mixer is
formed with the front-mounted level con-
trols adjusting the mix. In addition, one
module can be set to mute the other when
it is active, thereby providing an effective
paging system.
• Dual Mono
This mode is similar to the 70V Mono
mode except that in this mode the amp
supplies two channels of low-impedance
amplification. This mode still mixes the
input signal from the different modules
but a Channel Balance control is provided
to adjust the output levels of one channel
against the other.
Accessories
RPK86
Rear Rack
Mounting
Kit
Input Modules-
See Page 39
MODULES
M-Class Amplifiers
M300, M450, M600
Bogen's M-Class amplifiers provide professional sound installers with exactly what they
need from an amplifier: 3 modes of operation — stereo (4-ohm), 70V mono, dual mono
(4-ohm); 2 bays for a variety of input modules; up to 600W/ch stereo (4-ohm) or 1200W
of 70V mono power; massive power toroid and heat sinks; heavy 14-gauge chassis;
patented Back-Slope
™
AC voltage stabilization; clip limiters; and DC voltage, over-
current, and thermal protection circuits.
Product Features:
• 3 Mono power levels: 600W, 900W,
or 1200W for 70V speaker systems
• 3 Stereo power levels: 300W, 450W, or
600W per channel @ 4 ohms
• 3 Modes of operation to choose from:
Stereo (4-ohm), Dual Mono (4-ohm),
or 70V Mono
• 2 Module input bays for flexible modular
input capability
• Low noise, low distortion, and high slew rate
• Professional, high-impedance, balanced
stereo input module included (BAL2S)
• 3 Selectable low-frequency roll-off choices
• 2:1 Mixer function when in mono modes
• Insert connections for outboard equipment
(in mono modes)
•Post- and Pre-EQ Output Feeds (summed
mono out in stereo mode)
•DC, overload, short circuit, and thermal
protection circuits
•Clip limiting circuits for speaker protection
•Power-saving Sleep Mode for intermittent use
• Status, Signal, and Clip/Limit indicators
•Back-Slope AC voltage stabilization for
dependable performance over varying
AC line voltages
• Recessed volume control knobs
(behind cover)
• Mounts in 2 rack spaces (3-1/2") directly
stackable
• 2 Independent, continuously variable
cooling fans
• Easily removable front fan grilles with filters
• Stable into 2-ohm loads
• Listed to UL Standard 60065
for US and Canada
Operational Mode Selector -
Choose one of three settings to meet
application needs: 70V Mono, Dual
Mono (4-ohm), or Stereo (4-ohm). See
the sidebar on this page for descrip-
tion of operating modes.
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-process-
ing equipment when the amplifier
is in either 70V Mono or Dual
Mono modes (modular inputs are
in a 2:1 mixer configuration).
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.
Low-Impedance Outputs -
For 4- to 8-ohm speaker
loads. Unit is stable into
loads as low as 2 ohms.
Cooling Fans - Two independent,
variable-speed cooling fans respond
only as needed to keep the ampli-
fiers cool and reduce dust build-up.
70V Speaker Output -
For 70V constant voltage
speaker systems. Provides a
single channel of amplification.
Module Bay - The unit can accept one or
two Bogen input modules. Each amplifier
comes with a balanced, high-impedance
stereo input module.
Low Cut Filter Switch - Select a low-fre-
quency roll-off of 65 Hz or 125 Hz for
transformer-coupled and horn speakers.
Flat position allows full low-frequency
performance.
Rear Panel
PVMC
Module
Security
Cover
www.bogen.com
45
AMPLIFIERS
DUAL-CHANNEL POWER AMPLIFIERS
Technical Specifications, Dimensions,
and Weights can be found on Page 79
To Next Page
Loading...
Need help?
General
