Bogen M60A Operating Manual

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MODEL M60A

60 WATT PUBLIC ADDRESS AMPLIFIER

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INSTALLATION AND OPERATING MANUAL

READ THOROUGHLY BEFORE OPERATING EQUIPMENT

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DESCRIPTION

The Bogen model M60A is a general purpose
60 watt public address amplifier. Seven inputs are
provided-three for microphones, two for magnetic
phono or tape, and two auxiliary inputs for ceramic
phono or other high level sound sources.

Separate volume controls are provided for the
four input channels and a master volume control sets

the over-all gain. Bass and treble controls are pro-
vided for adjusting the tonal balance.

A monitor speaker may be mounted behind the
speaker grill on the front panel of the amplifier. The
Bogen Model MSK-I Monitor Speaker Accessory is
available for this purpose.

TECHNICAL SPECIFICATIONS

POWER OUTPUT: 60 watts at 3% distortion; 100 watts
peak
FREQUENCY RESPONSE: 20 to 20,000 cps :2 db
POWER RESPONSE: :3 db, 50 to 20,000 cps at 60
watts less than 5% distortion
HUM AND NOISE:
MIC Input: 65 db below rated power
AUX Input: 80 db below rated power
MAG Input: 65 db below rated power
GAIN:
M I C Input:
AUX Input:
MAG Input:
SENSITIVITY:
M I C Input:
AUX Input:
MAG Input:
INPUTS:
3 MIC high impedance (convertible to low imped-
ance with plug-in transformer)
2 MAG phono (or tape head)
2 AUX (high level, high impedance)

122 db
96 db
115 db

9 millivolts
0.4 volts
24 millivolts

OUTPUTS:
4, 8 and 16 ohm speakers
25 volt (10 ohm) balanced
70 volt (82 ohm) balanced (from quick disconnect
sockets)
TONE CONTROL ACTION:
TREBLE: «141/2 db to +12 db at 10 KC
BASS: -9/2dbto+15dbat500ps
CONTROLS:
MIC 1 Volume, INPUT 2 Volume, INPUTS Volume
AUX I AUX 2 Volume (fader type)
MIC 1 Selector (high or low impedance)
INPUT 2 Selector (high impedance, low impedance
or mag-tape)
INPUT 3 Selector (high impedance, low impedance
or mag~tape)
MASTER Volume, BASS, TREBLE, POWER Switch
TUBES AND RECTIFIERS:
Two 8417, one 7247, two 6EU7, three silicon
rectifiers
POWER CONSUMPTION: 160 watts
SHIPPING WEIGHT: 29 lbs.

ACCESSORIES

PLUG-IN TRANSFORMERS

Plug-in transformers permit this amplifier to be
used with low impedance as well as with high imped-
ance microphones. Bogen transformer model TMSO is
used for 50 ohm input, model Ill/I200 for 150 to 250
ohms, and model TM500 for 500 to 600 ohms. Installa-
tion of the transformer is described in the Installation
section.

MODEL SR2 AND SR4 REMOTE CONTROLLER

The Remote Controller permits the user to control
the gain of the MIC 1, MIC 2 and INPUT 3 Mag Phono
inputs from distances up to 2,000 feet from amplifier

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without sacrificing power or signal quality. It also
allows the user to mix and fade the three signal inputs.

MODEL MSK-I MONITOR SPEAKER

The Bogen Model MSK-l Monitor Speaker con-
sists of a loudspeaker and a level control, intercon-
nected and ready for mounting behind the speaker

grill on the front panel of the amplifier unit. Mounting d

instructions appear under Output Connections on page
5 of this manual.