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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 

1

20V 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

1

200W @ 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

.

1

6

1

V for 600W @ 4 ohms

1

.0

1

0V for 450W @ 4 ohms

0.840V for 300W @ 4 ohms

S/N Ratio (20K BW)

1

09 dB ref. 8 ohms, F.P.

1

06 dB ref. 8 ohms, F.P.

1

03 dB ref. 8 ohms, F.P.

Class of Operation

H

H

AB

Product Weight

46 lb.

44 lb.

4

1

lb.

Connectors:   

Power

Input

Output

20A line cord***

1

5A line cord

1

5A 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 @ 

1

kHz rated power

less than .02%

Load Impedance

4-8 ohms, 70V

Minimum Load Impedance (Stereo)

2 ohms

Frequency Response @ 

1

watt

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-

1

30V AC,  60Hz

Maximum AC Current

20A***

1

5A

1

2A

Indicators

Status (On/Protect/Sleep), Clip/Limit, Signal

Temperature Range

1

5 to 

1

05 degrees F

Cooling

Forced Air Variable Speed Fan

Physical Dimensions (W x H x D)

1

7" X 3-

1

/2" x 

1

6" (

1

9" 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

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