Bogen M-Class M300 User manual

• 3 mono power levels: 1200W, 900W, or 600W for
70V speaker systems
• 3 stereo power levels: 600W, 450W, or 300W per
channel @ 4 ohms
• 3 modes of operation to choose from - Stereo, Dual
Mono, or 70V Mono
• Low noise, low distortion, and high slew rate
• Flexible modular input capability (2 module capacity)
• Professional, dual-channel (balanced or unbalanced),
high-impedance input module with gain selection
included
• 3 selectable low-frequency, roll-off choices
• 2x1mixer 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
applications
• Status, Signal, and Clip/Limit indicators
• Back-Slope AC voltage stabilization for dependable
performance over varying AC line voltages
• Heavy-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 stackable
without need for extra space above or below
• 2 independent, continuously variable, cooling fans for
dependable and quiet operation
• Easily removable front fan grilles with filters
• Stable into 2-ohm loads
Features
Description
Specifications subject to change without notice.
© 2001Bogen Communications, Inc.
Part No. 54-5092-01R2 Printed in U.S.A. 0210
M-Class
Dual-Channel
Amplifiers
Models M600, M450
and M300
Bogen's M-Class delivers on what professional sound installers need most - Flexibility, Power, and Reliability.
Flexibility - 3 modes of operation: Stereo, 70V Mono, or Dual Mono; and 2 modular input bays for a variety of
prioritized input types. Power - up to 600W/ch stereo or 1200W of 70V mono power. Reliability - Massive
power toroid and heat sinks; heavy 14-gauge chassis; patented Back-Slope™ AC voltage stabilization; Clip lim-
iters, DC voltage, over-current, and thermal protection circuits.

The amplifier shall be a Bogen M-Class Amplifier, Model
M600, M450 or M300. The amplifier shall provide a
mono 70V output capable of 1200, 900 or 600 watts
respectively or, it can provide two independent ampli-
fier channels rated at 600, 450 or 300 watts/channel
into 4 ohms, respectively.
The amplifier shall provide 2 module bays for the installation of various input
modules. A dual-channel (balanced or unbalanced), high-impedance input mod-
ule shall come installed as a standard module in the amplifier.
The amplifier shall be capable of 3 distinct modes of operation. These are
Stereo, Dual Mono, and 70V Mono. In Dual Mono and 70V Mono, the amplifier
shall provide the function of a 2 x 1mixer of the installed input modules.
Additionally, in the Dual Mono and 70V Mono modes, the amplifier shall allow
one module to mute the other installed module if desired.
The amplifier shall drive the speaker load directly without the use of an output
transformer.The amplifier shall allow a user-selectable low frequency roll-off of
65 Hz, 125 Hz, or no roll-off.
The amplifier shall have a defeatable sleep mode that greatly reduces idle power
consumption when the amplifier has not received audio for more than 3 min-
utes. The amplifier shall also include a clip limiting feature that automatically
reduces amplifier clipping.
The amplifier shall have three indicators that correspond to status, signal, and
clip/limit.
The amplifier shall allow the connection of external signal processing equipment
when in Dual Mono or 70V Mono modes.The signal flow shall automatically be
diverted to external equipment when connected to the effects loop.The ampli-
fier shall also provide both pre- and post-EQ signal feeds for distribution to
other equipment.
The amplifier shall include a system that automatically compensates for surges
or sags in AC line voltages of up to +/-10%. Additionally, the amplifier shall be
protected against over-currents, overloads, excessive thermal dissipation, DC
voltage, and short circuit on the outputs.
The amplifier shall be enclosed in a heavy-gauge steel chassis with recessed level
control knob, which can be protected by a removable plastic cover.The amplifi-
er shall be cooled by 2 independent continuously variable speed fans with eas-
ily removable fan filters.
The amplifier shall allow the attachment of rack ears (rear rack ears optional)
and fit into a 19" rack using two rack spaces. It shall also allow the attachment
of feet for tabletop placement.
Architect &
Engineer
Specifications*
50 Spring Street, Ramsey, New Jersey 07446, U.S.A.
201-934-8500 FAX: [phone]
Web Site: www.bogen.com
* Both channels driven at nominal line voltage 120V AC, 60Hz. ** Module has Gain of 1. *** Requires 20A, NEMA 5-20R Type Receptacle.
* Architect and Engineer Specifications are available on CD and online in a Word
document to assist you with preparing your bids.
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
2 new Bogen std. 12-pin connector modules/RCA input
5-pin "touch-proof" Barrier Strip, RCA Pre- & Post-EQ Output
Power Bandwidth 20-40 kHz .5% THD
THD @ 1kHz rated power less than .02%
Load Impedance 4-8 ohms, 70V
Minimum Load Impedance (Stereo) 3.2 ohms
Frequency Response @ 1watt 20-20 kHz +/- 0.25 dB
Output Regulation, 1 kHz direct
1kHz 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"
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