Free Audio Service Manuals - Free download Bogen MX60A Operating Manual

Page 2

DESCRIPTION

The Bogen Model MX6OA is a 60-watt professional
quality, self-contained preamp-amplifier-mixer. It is
designed for use in theatres, radio stations, recording
studios, and quality public address installations.

The amplifier provides five microphone inputs,
four of which may be used with either high or low im-
pedance mikes. The fifth input will accommodate either
a high-impedance microphone or a magnetic phone/tape
head input. Input 6 will accommodate two high-level,
high-impedance auxiliary inputs, such as a ceramic
phono cartridge or tape recorder. A front panel control
permits fading between these inputs. All six inputs may
be mixed and faded, and the volume of each may be
controlled individually or simultaneously with the mas!
ter volume control. There is a bridging input which ac-
cepts inputs from a high-levelsource with its own level
Control. The. bridging input may be mixed with the other
inputs, but it cannot be individually controlled at the
amplifier.

Each of the five microphone input channels is
equipped with a music-speech filter switch, which may

POWER OUTPUT: 60 watts at less than 2% distortion.

PEAK POWER: 85 Watts.

FREQUENCY RESPONSE: ill: db, 10 Hz to 38 KHZ.

POWER RESPONSE: i1 db of 60 watts from 21 Hz to
30 KHz at 5% distortion.

HUM AND NOISE: Below rated output,
AUX 80 db, MIC 70 db, MAG 55 db.

GAIN: Based on 5009. input impedance,
AUX + 90 db, MIC + 120 db, MAG + 125 db.

SENSITIVITY: AUX 0.15 V, 1 IC 4 inv, MAG 2 mv.

BRIDGING INPUT SENSITIVITY: 5.8 V

BRIDGING OUTPUT: 0.6 V (across lMegQ)

DRIVER OUTPUT: 2 V

C.P. AND DRIVER OUTPUTS: cathode paralleling
and booster amplifier outputs for use when ex-
tra power is required.

DAMPING FACTOR: Better than 5 to 1.
rone CONTROL ACTION:

Treble: - 14 db to + 10.5 db at 10 KHZ
Bass: ~ 9 db to + 1445 db at 50 Hz

TECHNICAL SPECIFICATIONS

be set to provide a fixed, low-frequency attenuation for
the particular input. This selective filtering helps to
overcome poor room acoustics and increases speech
intelligibility by improving individual microphone re-
sponse.

All input channels, except the bridging input, may
be provided with remote volume control or microphone
precedence control. This is accomplished by using
Bogen accessories SR-Z, SR-4 and RVC-Z remote vol~
ume controls and the LVP-l limiter.

In addition to standard 4, 8 and 16-ohm output
speaker taps, constant voltage balanced 25~-volt and
70-volt lines are available at the output to simplify
line matching. The output may also be fed to a tele»
phone line by connecting the WMT~l as a bridging ac-
cessory across the 25-volt line.

The MXGOA amplifier may be paralleled with an»
other MX60A amplifier to double the number of input.
channels and increase the output power.

REGULATION: 2 db

INPUTS: (Total of 10) 4 MIC (convert to low imped-
ance with TMSO, Til/I200, TMSOO transformer),
Input 5 will accommodate 1 MIC (high imped-
ance) or 1 MAG phono (or tape head). Input 6
will accommodate 2 AUX high-level, high-
impedance inputs. 1 bridging input for high im»
pedauce or 600 Q balanced telephone line with
optional WM'IJ transformer.

NOTE: 4 MICS and the chosen input of inputs 5 and 6
may be simultaneously mixed and faded.
CONTROLS: 4 individual MIC volume (each with pull
speech filter switch). 1 input 5 volume (with
pull speech filter switch). 1 input 6, AUX].
AUX 2 volume (fader type). - master volume -
bass - treble . calibrated low frequency filter
(variable 10 ~ to 200 cps) - with pull switch,
(in-filter off) (out-filter on). ~ power switch ~
top of chassis 4 individual selector switches,
MIC 1 thru MIC 4 (high or low impedance). rear
panel input 5 switch (to select MIC 5 high im-
pedance or MAG/tape -limiter sensitivity (screw
driver adjust).

OUTPUTS: 4, 8 and 16 Q balanced, 25V balanced
(10(1), 70V balanced (82(2)

POWER CONSUMPTION: 180 watts.

TUBES AND RECTIFIERS: Two 8417, three 7247,
three 12AX7A, five silicon diodes.

DIMENSIONS: 17 W, 12 D, 5-3/8" H.

WEIGHT: 37 lbs.

,2,

Bogen MX60A Operating Manual

Extracted text from Bogen MX60A Operating Manual (Ocr-read)

Page 1

Page 2