Bogen M-Class M300 User manual

M-Class Series Amplifiers
Designed for Reliability,
Flexibility, and Power!
Three M-Class models - M600, M450,
and M300 - respectively provide 600W,
450W, and 300W per channel into 4-ohm
loads or 1200W, 900W, and 600W for
70V systems. Each amplifier is powered
by an oversized toroidal transformer for
solid performance.
50 Spring Street
Ramsey, NJ 07446, U.S.A.
Tel: [phone] •Fax: [phone]
www.bogen.com
55-0100-01D 0707
© 2007 Bogen Communications, Inc. All rights reserved.
Specifications subject to change without notice.
Models M300, M450,
and M600

One Series,
Various Installation Needs
Performance
Specifications
Bogen’s M-Class delivers on what contractors need most:
•Reliability - Massive power toroid and heat sinks, heavy 14-gauge chassis, Back-Slope™ AC voltage
stabilization, Clip limiters, DC voltage, over-current and thermal protection circuits.
•Flexibility - 3 modes of operation: 70V Mono, Dual Mono, or Stereo; 2 modular input bays
for a variety of prioritized input types.
•Power - up to 600W/ch stereo or 1200W of 70V mono power with low distortion and a high slew rate.
All this wrapped into 2 rack spaces of some of the best looking metal in the industry.
Three, Flexible Operating Modes
Flexible operating modes meet different installation needs.
70V Mono Mode Dual Mono Mode
Stereo Mode
70V Mono Mode: Provides a single channel of output for
70V constant voltage speaker systems. Inputs form
a 2x1 mixer with the front panel controls determining
the signal levels from each input.
Stereo Mode: In stereo mode, the front panel controls allow
independent operation of the two power amp channels.
Dual Mono Mode: Dual mono provides the same mixer
operation as 70V Mono Mode, but with two amplifier
channels for low-impedance speaker systems. A balance
control is provided to adjust the overall volume level
between the two amplifier outputs. Inputs form a 2x1
mixer with the front panel controls determining the signal
levels from each input. * Both channels driven at nominal line voltage 120V AC, 60Hz. ** Module set to Gain of 1. *** Requires 20A, NEMA 5-20R Type Receptacle.
Technical Specifications M600 M450 M300
Power Output
70V Mono
4-ohm
8-ohm
1200W @ 4 ohms
600W per channel*
400W per channel*
900W @ 5.5 ohms
450W per channel*
300W per channel*
600W @ 8 ohms
300W per channel*
200W per channel*
Input Sensitivity
At Backplane Connector or using
Standard Input Module (incl.)**
1.161V for 600W @ 4 ohms 1.010V for 450W @ 4 ohms 0.840V for 300W @ 4 ohms
S/N Ratio (20K BW) 109 dB ref. 8 ohms, F.P. 106 dB ref. 8 ohms, F.P. 103 dB ref. 8 ohms, F.P.
Class of Operation H H AB
Product Weight 46 lb. 44 lb. 41lb.
Connectors: Power
Input
Output
20A line cord*** 15A line cord 15A line cord
Dependent on Modules installed (stereo, high-impedance balanced module w/screw terminals included)
5-pin "touch-proof" Barrier Strip, RCA Pre- & Post-EQ Output
Power Bandwidth 20 Hz - 40 kHz .5% THD
THD @ 1kHz rated power less than .02%
Load Impedance 4-8 ohms, 70V
Minimum Load Impedance (Stereo) 2 ohms
Frequency Response @ 1watt 20 Hz - 20 kHz +/- 0.25 dB
Output Regulation, 1 kHz direct
1 kHz bridged
0.5 dB @ 8 ohms
1.5 dB @ 70V
Inputs (Plug-in modules) Electronically balanced, high-impedance module standard, other modular input types available
AC Input Voltage Range 95-130V AC, 60Hz
Maximum AC Current 20A*** 15A 12A
Indicators Status (On/Protect/Sleep), Clip/Limit, Signal
Temperature Range 15 to 105 degrees F
Cooling Forced Air Variable Speed Fan
Physical Dimensions (W x H x D) 17" X 3-1/2" x 16" (19" wide with Rack Ears)
Protection RF, DC, Low-frequency,Thermal, Low-Impedance, Circuit-Breaker, Short Circuit
Special Features Sleep Mode, Back-Slope regulation, Stereo, Dual Mono, 70V Mono Operation,Toroidal Power Transformer
Accessories
RPK86
Rear Rack
Mounting
Kit
PVMC
Module
Security
Cover

M-Class
Series Features
•3 Models: M600, M450, and M300
•3 stereo power levels: 600W, 450W, or 300W
per channel @ 4 ohms (both channels driven)
•3 mono power levels: 1200W, 900W, or 600W
for 70V speaker systems
•3 modes of operation to choose from:
70V Mono, Dual Mono, or Stereo
•Low noise, low distortion, and high slew rate
•Flexible modular input capability (2 module capacity)
•Professional-quality, balanced, high-impedance
input module (included)
•3 selectable low-frequency roll-off choices
•2x1 mixer function when in mono modes
•Prioritized inputs when in mono modes
•Insert connectors for outboard equipment
(in mono modes)
•Post- and Pre-EQ Output Feeds (in mono mode)
•DC, overload, and thermal protection circuits
•Clip detection and limiting circuits for speaker
protection
•Power-saving Sleep Mode for intermittent use
applications
•Signal, Clip, Sleep Mode, and Protect indicators
•Back-Slope AC voltage stabilization for depend-
able performance over varying AC line voltages
•Heavy 14-gauge steel chassis with cast
aluminum front panel
•Recessed volume control knobs with snap-on,
protective cover
•Mounts in 2 rack spaces (3-1/2") directly stack-
able without need for extra space above or below
•2 independent, continuously variable, cooling
fans for dependable and quiet operation
•Easily removable front fan grilles
•Stable into 2-ohm loads
Back-Slope™ AC Voltage Stabilization
Bogen’s patented Back-Slope circuitry assures consistent performance and reliability by regulating the proper amount of
AC energy from the amplifier’s power toroid, as AC line voltages rise and fall (up to 10%), thus maintaining maximum
performance. This also prevents damage to the amplifier over varying line voltages and load conditions.
Sleep Mode
Energy-saving Sleep Mode feature reduces amplifier power consumption during idle periods. When a signal is absent
for more than three minutes, the unit will go into sleep mode. During sleep mode, the unit draws less power.
Instant-on wake operation automatically returns the unit to full power when an audio signal is detected, without
cutting off the beginning of the signal. (Sleep mode is defeatable.)
Input Options & Priorities
M-Class amplifiers support up to two input modules with up to two priority settings. Either module can be set as a
higher priority, making the other module the lower priority. Both module inputs can be mixed together. Each amplifier
comes standard with a professional-quality, stereo, high-impedance balanced input module. Other modules can be
added as needed.
Back-Slope provides these advantages:
•the output voltage of the amplifier is better
controlled when the unit is lightly loaded
•ensures better low-frequency performance into
step-down transformers
•prevents component damage to the amplifier if
the power line voltage goes above its nominal
value and improves the reliability of the unit
•regulates the rail voltage of the amplifier efficiently
with minimal wasted heat
TELEPHONE INPUT - TEL1S
Interfaces to Telephone System's Loop Start/Ground Start Trunks
or Paging Ports
•Loop start or ground start trunk interfacing
•Dry loop interface to paging ports
•Audio-activated paging in dry loop
• Gain/Trim control; Noise gate & Limiter
•Mutes lower priority modules
•Mutable by higher priority modules
•Bus assignable & Transformer-isolated
•Screw terminal connections
BRIDGING INPUT - BRG1R
Daisy Chain Multiple Amplifier Inputs
•Gain/Trim control
•Ground isolated input to eliminate ground loop
•Input signal available at buffered output
•Priority assignable
•Variable ducking level when muted
•Fade back from mute
•Buffered output not muted
•Bus assignable
•RCA input and output connector
MONO AUX INPUT - MAX1R
Unbalanced Mono Input
•Gain/Trim control
•Bass & Treble controls
•Gate feature mutes lower priority modules
•Mutable by higher priority modules
•Variable ducking level when muted
•Fade back from mute
•Bus assignable
•RCA connector
BALANCED INPUT - BAL2S
Stereo, Balanced Input
•Stereo, high-impedance, electronically balanced inputs
•Professional-quality, low noise performance
•Selectable gain of 0 or 18 dB
•Compatible with telephone system page ports
•Mutable by higher priority modules
•Variable ducking level when muted
•Fade back from mute
•Screw terminal connections
STEREO AUX INPUT - SAX1R
Unbalanced Stereo Input
•Gain/Trim control
•Bass & Treble controls
•Gate feature mutes lower priority modules
•Mutable by higher priority modules
•Variable ducking level when muted
•Fade back from mute
•Stereo-to-mono summing option
•Bus assignable
•RCA connectors
MICROPHONE INPUTS - MIC2S, MIC2X
Low-impedance, Electronic-balanced Microphone Inputs
•Gain/Trim control
•High Cut/Low Cut controls
•Enhance control
•Noise gate w/Threshold control
•Limiter w/Threshold control
•24V Phantom power
•Priority & Bus assignable
•Screw terminals (MIC2S);
XLR connector (MIC2X)
MICROPHONE INPUTS - MIC1S, MIC1X
Low-impedance, Transformer-balanced Microphone Inputs
•Gain/Trim control
•Bass & Treble controls
•Noise gate w/Threshold
& Duration control
•Limiter w/Threshold control
•24V Phantom power
•Priority & Bus assignable
•Balanced, transformer-isolated
•Screw terminals (MIC1S);
XLR connector (MIC1X)
TRANSFORMER-BALANCED INPUT - TBL1S
Transformer-Balanced AUX Input
•Gain/Trim control
•Bass & Treble controls
• Transformer-isolated, dual-impedance, line-level input
•Variable ducking level when muted
•Mute send & receive
•Fade back from mute
•Mute send threshold & duration adjustments
•Priority & Bus assignable
•Pluggable screw terminal connections
TONE GENERATOR - TNG1S
Multiple Tone Generator Input
•Level control
•Select 4 of 8 tones to trigger
•Burst/steady, slow whoop, siren, mechanical bell,
Klaxon, night ringer, double chime, & doorbell tones
•Momentary & continuous playback modes
•Microprocessor-controlled
•Priority assignable
•Mute send & receive
•Screw terminal trigger connections
LINE/MIC INPUTS - LMM1S, LMR1S
Actively Balanced Emulated Transformer Inputs
•Input level controlled
by remote panel or direct
voltage (LMR1S)
•Wall Plate Control included
(with LMR1S only)
•Limiter with LED activity
indicator (LMR1S)
•Line/MIC gain switch
•Gain/Trim control
•Bass & Treble controls
•Noise gate w/threshold control
•Fade back from mute
•24V phantom power
•Priority & bus assignments
•Screw terminal input
•Mutes lower priority modules
•Mutable by higher priority
modules
Accessories
PRS48
48V DC
Power
Supply
LMM1S
(Same as LMR1S,
without Remote
Volume capability)
MIC1S MIC1X
MIC2S MIC2X
LMR1S
with Remote
Volume Control
Each amplifier can accept up to two Bogen input modules, with user-settable priority levels.
Plug-in modules support different signal processing options including the ability to interface
to balanced and unbalanced high- and low-level inputs, stereo or mono, telephone PBXs, and microphones. A stereo, balanced, high-
impedance, input module (BAL2S) comes standard with each amplifier. Other modules offer more advanced functionality.
Input Modules
RELAY INPUT/OUTPUT - RIO1S
•Transformer-isolated, balanced line-level input
•600-ohm or 10k jumper selectable input impedance
•8-ohm, 750mW Mix Bus output
•Input and output level controls
•Relay contacts respond to selectable priority level
•N.O. or N.C. relay contacts
•External control of priority muting
•Input can be muted from higher priority modules,
with signal fade back

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 2:1mixer.
Dual Mono provides 2 identical channels
of low-impedance power with modular
inputs combined in a 2:1mixer.
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
2:1mixer 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

M-Class
Series Features
•3 Models: M600, M450, and M300
•3 stereo power levels: 600W, 450W, or 300W
per channel @ 4 ohms (both channels driven)
•3 mono power levels: 1200W, 900W, or 600W
for 70V speaker systems
•3 modes of operation to choose from:
70V Mono, Dual Mono, or Stereo
•Low noise, low distortion, and high slew rate
•Flexible modular input capability (2 module capacity)
•Professional-quality, balanced, high-impedance
input module (included)
•3 selectable low-frequency roll-off choices
•2x1 mixer function when in mono modes
•Prioritized inputs when in mono modes
•Insert connectors for outboard equipment
(in mono modes)
•Post- and Pre-EQ Output Feeds (in mono mode)
•DC, overload, and thermal protection circuits
•Clip detection and limiting circuits for speaker
protection
•Power-saving Sleep Mode for intermittent use
applications
•Signal, Clip, Sleep Mode, and Protect indicators
•Back-Slope AC voltage stabilization for depend-
able performance over varying AC line voltages
•Heavy 14-gauge steel chassis with cast
aluminum front panel
•Recessed volume control knobs with snap-on,
protective cover
•Mounts in 2 rack spaces (3-1/2") directly stack-
able without need for extra space above or below
•2 independent, continuously variable, cooling
fans for dependable and quiet operation
•Easily removable front fan grilles
•Stable into 2-ohm loads
Back-Slope™ AC Voltage Stabilization
Bogen’s patented Back-Slope circuitry assures consistent performance and reliability by regulating the proper amount of
AC energy from the amplifier’s power toroid, as AC line voltages rise and fall (up to 10%), thus maintaining maximum
performance. This also prevents damage to the amplifier over varying line voltages and load conditions.
Sleep Mode
Energy-saving Sleep Mode feature reduces amplifier power consumption during idle periods. When a signal is absent
for more than three minutes, the unit will go into sleep mode. During sleep mode, the unit draws less power.
Instant-on wake operation automatically returns the unit to full power when an audio signal is detected, without
cutting off the beginning of the signal. (Sleep mode is defeatable.)
Input Options & Priorities
M-Class amplifiers support up to two input modules with up to two priority settings. Either module can be set as a
higher priority, making the other module the lower priority. Both module inputs can be mixed together. Each amplifier
comes standard with a professional-quality, stereo, high-impedance balanced input module. Other modules can be
added as needed.
Back-Slope provides these advantages:
•the output voltage of the amplifier is better
controlled when the unit is lightly loaded
•ensures better low-frequency performance into
step-down transformers
•prevents component damage to the amplifier if
the power line voltage goes above its nominal
value and improves the reliability of the unit
•regulates the rail voltage of the amplifier efficiently
with minimal wasted heat
TELEPHONE INPUT - TEL1S
Interfaces to Telephone System's Loop Start/Ground Start Trunks
or Paging Ports
•Loop start or ground start trunk interfacing
•Dry loop interface to paging ports
•Audio-activated paging in dry loop
• Gain/Trim control; Noise gate & Limiter
•Mutes lower priority modules
•Mutable by higher priority modules
•Bus assignable & Transformer-isolated
•Screw terminal connections
BRIDGING INPUT - BRG1R
Daisy Chain Multiple Amplifier Inputs
•Gain/Trim control
•Ground isolated input to eliminate ground loop
•Input signal available at buffered output
•Priority assignable
•Variable ducking level when muted
•Fade back from mute
•Buffered output not muted
•Bus assignable
•RCA input and output connector
MONO AUX INPUT - MAX1R
Unbalanced Mono Input
•Gain/Trim control
•Bass & Treble controls
•Gate feature mutes lower priority modules
•Mutable by higher priority modules
•Variable ducking level when muted
•Fade back from mute
•Bus assignable
•RCA connector
BALANCED INPUT - BAL2S
Stereo, Balanced Input
•Stereo, high-impedance, electronically balanced inputs
•Professional-quality, low noise performance
•Selectable gain of 0 or 18 dB
•Compatible with telephone system page ports
•Mutable by higher priority modules
•Variable ducking level when muted
•Fade back from mute
•Screw terminal connections
STEREO AUX INPUT - SAX1R
Unbalanced Stereo Input
•Gain/Trim control
•Bass & Treble controls
•Gate feature mutes lower priority modules
•Mutable by higher priority modules
•Variable ducking level when muted
•Fade back from mute
•Stereo-to-mono summing option
•Bus assignable
•RCA connectors
MICROPHONE INPUTS - MIC2S, MIC2X
Low-impedance, Electronic-balanced Microphone Inputs
•Gain/Trim control
•High Cut/Low Cut controls
•Enhance control
•Noise gate w/Threshold control
•Limiter w/Threshold control
•24V Phantom power
•Priority & Bus assignable
•Screw terminals (MIC2S);
XLR connector (MIC2X)
MICROPHONE INPUTS - MIC1S, MIC1X
Low-impedance, Transformer-balanced Microphone Inputs
•Gain/Trim control
•Bass & Treble controls
•Noise gate w/Threshold
& Duration control
•Limiter w/Threshold control
•24V Phantom power
•Priority & Bus assignable
•Balanced, transformer-isolated
•Screw terminals (MIC1S);
XLR connector (MIC1X)
TRANSFORMER-BALANCED INPUT - TBL1S
Transformer-Balanced AUX Input
•Gain/Trim control
•Bass & Treble controls
• Transformer-isolated, dual-impedance, line-level input
•Variable ducking level when muted
•Mute send & receive
•Fade back from mute
•Mute send threshold & duration adjustments
•Priority & Bus assignable
•Pluggable screw terminal connections
TONE GENERATOR - TNG1S
Multiple Tone Generator Input
•Level control
•Select 4 of 8 tones to trigger
•Burst/steady, slow whoop, siren, mechanical bell,
Klaxon, night ringer, double chime, & doorbell tones
•Momentary & continuous playback modes
•Microprocessor-controlled
•Priority assignable
•Mute send & receive
•Screw terminal trigger connections
LINE/MIC INPUTS - LMM1S, LMR1S
Actively Balanced Emulated Transformer Inputs
•Input level controlled
by remote panel or direct
voltage (LMR1S)
•Wall Plate Control included
(with LMR1S only)
•Limiter with LED activity
indicator (LMR1S)
•Line/MIC gain switch
•Gain/Trim control
•Bass & Treble controls
•Noise gate w/threshold control
•Fade back from mute
•24V phantom power
•Priority & bus assignments
•Screw terminal input
•Mutes lower priority modules
•Mutable by higher priority
modules
Accessories
PRS48
48V DC
Power
Supply
LMM1S
(Same as LMR1S,
without Remote
Volume capability)
MIC1S MIC1X
MIC2S MIC2X
LMR1S
with Remote
Volume Control
Each amplifier can accept up to two Bogen input modules, with user-settable priority levels.
Plug-in modules support different signal processing options including the ability to interface
to balanced and unbalanced high- and low-level inputs, stereo or mono, telephone PBXs, and microphones. A stereo, balanced, high-
impedance, input module (BAL2S) comes standard with each amplifier. Other modules offer more advanced functionality.
Input Modules
RELAY INPUT/OUTPUT - RIO1S
•Transformer-isolated, balanced line-level input
•600-ohm or 10k jumper selectable input impedance
•8-ohm, 750mW Mix Bus output
•Input and output level controls
•Relay contacts respond to selectable priority level
•N.O. or N.C. relay contacts
•External control of priority muting
•Input can be muted from higher priority modules,
with signal fade back

One Series,
Various Installation Needs
Performance
Specifications
Bogen’s M-Class delivers on what contractors need most:
•Reliability - Massive power toroid and heat sinks, heavy 14-gauge chassis, Back-Slope™ AC voltage
stabilization, Clip limiters, DC voltage, over-current and thermal protection circuits.
•Flexibility - 3 modes of operation: 70V Mono, Dual Mono, or Stereo; 2 modular input bays
for a variety of prioritized input types.
•Power - up to 600W/ch stereo or 1200W of 70V mono power with low distortion and a high slew rate.
All this wrapped into 2 rack spaces of some of the best looking metal in the industry.
Three, Flexible Operating Modes
Flexible operating modes meet different installation needs.
70V Mono Mode Dual Mono Mode
Stereo Mode
70V Mono Mode: Provides a single channel of output for
70V constant voltage speaker systems. Inputs form
a 2x1 mixer with the front panel controls determining
the signal levels from each input.
Stereo Mode: In stereo mode, the front panel controls allow
independent operation of the two power amp channels.
Dual Mono Mode: Dual mono provides the same mixer
operation as 70V Mono Mode, but with two amplifier
channels for low-impedance speaker systems. A balance
control is provided to adjust the overall volume level
between the two amplifier outputs. Inputs form a 2x1
mixer with the front panel controls determining the signal
levels from each input. * Both channels driven at nominal line voltage 120V AC, 60Hz. ** Module set to Gain of 1. *** Requires 20A, NEMA 5-20R Type Receptacle.
Technical Specifications M600 M450 M300
Power Output
70V Mono
4-ohm
8-ohm
1200W @ 4 ohms
600W per channel*
400W per channel*
900W @ 5.5 ohms
450W per channel*
300W per channel*
600W @ 8 ohms
300W per channel*
200W per channel*
Input Sensitivity
At Backplane Connector or using
Standard Input Module (incl.)**
1.161V for 600W @ 4 ohms 1.010V for 450W @ 4 ohms 0.840V for 300W @ 4 ohms
S/N Ratio (20K BW) 109 dB ref. 8 ohms, F.P. 106 dB ref. 8 ohms, F.P. 103 dB ref. 8 ohms, F.P.
Class of Operation H H AB
Product Weight 46 lb. 44 lb. 41lb.
Connectors: Power
Input
Output
20A line cord*** 15A line cord 15A line cord
Dependent on Modules installed (stereo, high-impedance balanced module w/screw terminals included)
5-pin "touch-proof" Barrier Strip, RCA Pre- & Post-EQ Output
Power Bandwidth 20 Hz - 40 kHz .5% THD
THD @ 1kHz rated power less than .02%
Load Impedance 4-8 ohms, 70V
Minimum Load Impedance (Stereo) 2 ohms
Frequency Response @ 1watt 20 Hz - 20 kHz +/- 0.25 dB
Output Regulation, 1 kHz direct
1 kHz bridged
0.5 dB @ 8 ohms
1.5 dB @ 70V
Inputs (Plug-in modules) Electronically balanced, high-impedance module standard, other modular input types available
AC Input Voltage Range 95-130V AC, 60Hz
Maximum AC Current 20A*** 15A 12A
Indicators Status (On/Protect/Sleep), Clip/Limit, Signal
Temperature Range 15 to 105 degrees F
Cooling Forced Air Variable Speed Fan
Physical Dimensions (W x H x D) 17" X 3-1/2" x 16" (19" wide with Rack Ears)
Protection RF, DC, Low-frequency,Thermal, Low-Impedance, Circuit-Breaker, Short Circuit
Special Features Sleep Mode, Back-Slope regulation, Stereo, Dual Mono, 70V Mono Operation,Toroidal Power Transformer
Accessories
RPK86
Rear Rack
Mounting
Kit
PVMC
Module
Security
Cover

M-Class Series Amplifiers
Designed for Reliability,
Flexibility, and Power!
Three M-Class models - M600, M450,
and M300 - respectively provide 600W,
450W, and 300W per channel into 4-ohm
loads or 1200W, 900W, and 600W for
70V systems. Each amplifier is powered
by an oversized toroidal transformer for
solid performance.
50 Spring Street
Ramsey, NJ 07446, U.S.A.
Tel: [phone] •Fax: [phone]
www.bogen.com
55-0100-01D 0707
© 2007 Bogen Communications, Inc. All rights reserved.
Specifications subject to change without notice.
Models M300, M450,
and M600