Shure m63 and m63 2e audio master

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5g PROFESSIONAL PRODUCTS DATA

AREA CODE 3121323-9000 CABLE: SHUREMICRO

222 NARTREV AVE., EVANSTON, IL. 60204 U.S.A.

General: The Shure Model M63 Audio Master is a
unit designed to give maximum flexibility in the con-
trol of volume, bass response, treble response, and high
and low frequency roll-off. The Model M63 works
ideally as a Master Control Center when used in
conjunction with the Shure Model M68 Series of
Microphone Mixers.

The M63 provides a means to equalize sound
systems for correction of room acoustics, to reduce
feedback, to provide special sound effects, to reduce
stand and stage noise and for tape recording.

The Model M63-2E Audio Master is similar to Model
M63 except that it is designed to be connected to a
220-260 volt AC power line.

All information on the data sheet for the Model
M63 applies, except for those references to AC
operating voltage and power line cord.

The Audio Master features:
0 Five types of outputs
-600 ohms balanced line level
-High impedance, high level
-High impedance microphone level
-Low impedance microphone level, balanced
-Headphone jack for monitoring

. Inputs for two driving sources

a A VU meter to monitor audio level

- Continuously variable high pass and low pass

6 do per octave filters
a Bass and treble tone controls

Controls, Connections and Operation
INPUTS

The two high impedance inputs (phono jacks) marked
HIGH LEVEL INPUTS are designed to accept high
level signals from a microphone mixer such as the
Shure M68, M68RM, etc.), tape recorder, AM-FM
tuner, or output from Shure Model A68P Phonograph
Preamplifier (accessory).

To use with the Shure M68 Microphone Mixer
series, connect the AUX. HIGH LEVEL OUTPUT on
the mixer to the input of the M63 with a shielded
cable having a male phono plug on each end (such as
the Shure A68SC). Set the MASTER volume control
on the mixer to approximately 6 and use the VOLUME
control on the M63 to adjust the overall level.

Although not specifically designed lor use with the
Shure M67, it may be used in conjunction with the
M67 in the following manner: connect a shielded
single conductor cable with a A" phone plug on one
end and a phono plug on the other from the head-
phone output of the M67 to the M63 input. To obtain
good volume control action from M63, install a 180-ohm
resistor lrom tip to sleeve in the phone plug and use
the M63 volume control to adjust output to desired level.

Copyright 1973, Shure Brothers inc,
27A90§ (MH)

OUTPUTS

Microphone

The receptacle marked MICROPHONE LEVEL
OUTPUT is a dual impedance output selected by
the switch above the receptacle. This output is
designed to work into a balanced 25 to 250 ohm in-
put, or, with the MICROPHONE IMPEDANCE
selector switch in the Hi position, into an un-
balanced high impedance microphone input on
an amplifier or tape recorder. The receptacle is a
professional three-pin male audio connector de-
signed to mate with Cannon XL series, Switchcraft
A3 (0.6.) series or equivalent connector (Shure
Part 95A548). See Figure A for output receptacle
connections.

Line

The line output (binding posts) is on the rear panel
and is designated 600 OHM BALANCED LINE
OUTPUT. These terminals are numbered 3" and
2" and are in phase with correspondingly num-
bered pins in the microphone output connector. The
adjacent ground terminal corresponds to pin I. While
the line output may be used to drive lines of various
impedances (150 ohms or greater), the VU meter
is calibrated for use with a 600 ohm terminated
line.

Auxiliary
The phono jack marked AUXILIARY HI IMP OUT-
PUT is a high-impedance, high-level output de-
signed primarily to feed a power amplifier re-
quiring .5 to 2 volts, or the auxiliary or tuner input
of an amplifier or tape recorder.

NOTE: The microphone, line and auxiliary outputs
may be used simultaneously if desired, to
provide an isolated PA feed or to drive
different pieces of equipment.

Headphone output

The headphone output on the rear panel is desig-
nated HEADPHONES. A two-circuit phone jack is
used to provide a choice of level for different
headphone impedances. Normally, a single-circuit
plug should be used. If inserted only partially (to
the first detent), the available voltage is approxi-
mately 0.25 volts; the second position will provide
approximately 0.50 volts across 1000-ohm head-
phones at +4 dbm (0 VU) line output. Crystal head-
phones may be used, but the level will be the same
in either jack position.

If stereo phones are used, the two-circuit plug may
be inserted completely (to second position) and
output will appear in both phones.

Printed in U S A.

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MIG.OUTPUT '-
LOW IMPEDANCE
(BALANCED LINE)

MIG. OUTPUT
HIGH lMPEDANcE

MICROPHONE OUTPUT PLUG CONNECTION.
FIGURE A

SPECIFICATIONS

Specifications at 120 volts AC (M63) or 240 volts
AC (M63-2E), 60 Hz Line Voltage.

Frequency Response: :2 db from 20 to 20,000 Hz
(all controls flat)

Voltage Gain: (outputs terminated as noted, others
open; volume and level control max.)

Line Output: 38.5 db (600 ohm load)

Aux. Output: 39.0 db (47 K ohm load)
Hi-lmp. Mic. Output: -1.0 db (33 K ohm load)
Lo-lmp. Mic. Output: -21.0 do (150 ohm load)

Tone Controls: Bass: +14, -19 db at 100 Hz Typ.
Treble: + 16, -19 db at 10 K Hz Typ.

Filters: Hi-Cut and Lo-Cut 6 db per octave, con-
tinuously variable -3 db point.

Noise Output (Line with 600 ohm load):
Volume Control min.:
74 db below +8 dbm, 20 HZ - 20 K HZ
81 db below +8 dbm, 300 Hz - 20 K Hz
Volume Control max., 4.7 K ohm source:
68 db below +8 dbm, 20 HZ - 20 K Hz
71 db below +8 dbm, 300 HZ - 20 K Hz

Distortion: Under 1% T.H.D. at +8 dbm output

Clipping Level: +18 dbm (600 ohm load)

VU Meter: Calibrated for 600 ohm line termination.
0 V U = +8 dbm i 1 db fixed; or
0 V U = +4 dbm; output may be attenuated

by 20 db.

Inputs: Two, mixing. Impedance 50 K ohms nominal.
No amplification precedes VOLUME con-
trol, so that high-level input signals cannot
cause overloading.

Outputs:

600 ohm line: Balanced and floating, 150 ohms
minimum load, 125 ohms actual internal imped-

+fll% (2883mm)

ance. Will operate with up to 100 ma. DC
through transformer for driving telephone lines.

Auxiliary Hi-lmp.: Unbalanced, 4.7 K ohms internal
impedance. For driving high-level, high imped-
ance inputs.

Microphone Hi-lmp.: Unbalanced, l K ohm in-
ternal impedance. For driving medium-level high
impedance microphone inputs.

Microphone Lo-lmp.: Balanced, 0.5 ohm internal
impedance. For driving low-level 25 to 250 ohm
microphone inputs.

Headphone: Two-level, for 600 to 2,000 ohm
headphones. Crystal headphones may be used.

Operating Voltage:

MODEL M63:

AC Operation: 108-132 volts, at 50 to 60 HZ.

DC Operation: 30 volts, 20 ma. maximum drain

for +8 dbm output.

MODEL M63-2E:
AC Operation: 220-260 volts, at 50 to 60 HZ.
DC Operation: 30 volts, 20 ma. maximum at
+8 dbm output.

The Model M63-2E is supplied with a three-
conductor power-line cord, but no plug. The
power-line cord plug should be installed by a
qualified person. The brown lead should be con-
nected to the live" or hot" terminal of the
plug, and the blue lead to the neutral terminal
of the plug. The green/yellow lead is the ground-
ing conductor and should be connected to the
ground or earth terminal of the plug.

UL and CSA:
The M63 is listed by Underwriters' Laboratories,
Inc. and is listed by Canadian Standards Associ-
ation as certified.
Overall Dimensions: See Figure B."
Weight: 3 lbs. 2 ozs. (1.4 kg)
Operating Temperature:
-7°c (20°F) to 57°C (135°F)
Guarantee: This Shure product is guaranteed in
normal use to be tree from electrical and mechanical
defects for a period of one year irom the date of
purchase. Please retain proof ol purchase date. This
guarantee includes all parts and labor.
Shipping Instructions: Carefully repock the unit
and return it prepaid to the factory. It outside
the United States, return the unit to your dealer or
Authorized Shure Service Center for repair. The unit
will be returned to you prepaid.

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OVERALL DIMENSIONS

FIGURE B

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