Shure M63 AUDIO MASTER Techical Data

PRODUCTS DATA
GENERAL
The Shure Model M63 AUDIO MASTER@ is designed
to give maximum flexibility in the control of volume,
bass response, treble response, and high and low
frequency rolloff. 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 sys-
tems for correction of room acoustics, to reduce
feedback, to provide special sound effects, to reduce
stand and stage noise and for tape recording.
AUDIO MASTER features:
m
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
=
VU meter to monitor audio level
=
Continuously variable high-pass and low-pass
6 dB per octave filters
Bass and treble tone controls
SPECIFICATIONS
(At 120 volts ac, 60 Hz line voltage)
Frequency Response
- t 2 dB, 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 (47k load)
Hi-Imp. Mic. Output: -1.0 dB (33k load)
Lo-Imp. Mic. Output: -21.0 dB (150-ohm load)
Tone Controls
Bass:
+
14, - 19 dB at 100 Hz Typical
Treble:
+
16,
-
19 dB at 10k Hz Typical
Filters
Hi-Cut and Lo-Cut 6 dB per octave, continuously
variable - 3 dB point
Noise Output (Line with 600-ohm load)
Volume Control min.:
76 dB below + 8 dBm, 20 Hz -20 kHz
81 dB below + 8 dBm, 300 Hz -20 kHz
Volume Control max., 4.7k source:
68 dB below + 8 dBm, 20 Hz -20 kHz
71 dB below + 8 dBm, 300 Hz - 20 kHz
Distortion
Under 1 % THD at + 8 dBm output
Clipping Level
+18 dBm (600-ohm load)
VU Meter (Calibrated for 600-ohm line termination)
0 VU
=
+ 8 dBm tl dB fixed; or
0 VU = + 4 dBm; output may be attenuated by
20 dB
Inputs
Two, mixing. Impedance 50k nominal. No amplifica-
tion precedes VOLUME control, 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-
ance. Will operate with up to 100 mA dc through
transformer for driving telephone lines.
Auxiliary Hi-Imp.: Unbalanced, 4.7k internal imped-
ance. For driving high-level, high impedance
inputs.
Microphone Hi-Imp.: Unbalanced, I k internal imped-
ance. For driving medium-level high impedance
microphone inputs.
Microphone Lo-Imp.: 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 head-
phones. Crystal headphones may be used.
Operating Voltage
AC Operation:
108-132 volts, at 50160 Hz
DC Operation: 30 volts, 20 mA maximum drain for
+ 8 dBm output
Overall Dimensions
See Figure 2
Weight
1.4 kg (3 Ib 2 oz)
Operating Temperature
-7°C to 57°C (20" to 135°F)
Certifications
The M63 is Listed by Underwriters' Laboratories, Inc.
and is listed by Canadian Standards Association as
Certified.
Copyright 1981, Shure Brothers Inc.
27A8024 ( A l ) Printed in U.S.A.