Shure M67 Technical Data Manual

2 2 2 H A R T R E Y
AVE.,
E V A N S T O N , I L . 6 0 2 0 4 U . S . A . A R E A C O D E
3 1 2 / 3 2 8 - 9 0 0 0
C A B L E : S H U R E M I C R O
(S;
The M 6 7 i s a transistorized microphone mixer/remote
amplifier specifically designed f o r professional ap-
plications. The excellent performance and versatility
of this complete, compact console make
it
an ideal
choice f o r studio, remote, or original sound reinforce-
ment use, and as an "add-on" mixer for expanding
existing facilities.
It
is also ideally suited f o r use with
tape recorders and VTR's t o provide multiple micro-
phone inputs.
The Model M67-2E Professional Microphone Mixer
is similar t o M o d e l M 6 7 except t h a t
it
is designed t o
be connected t o a 216-264 volt
AC
power line.
All
information on the data sheet for the M o d e l
M 6 7 applies, except for those references t o
AC
operating voltage and power-line cord.
Features include:
W i d e , flat frequency response and low distortion a t
up t o $ 18 d b m output.
Extremely low noise and RF susceptibility.
Four low impedance balanced-line microphone in-
puts with individual gain controls. Mumetal shielding
on input transformers.
Line input switchable for 600-ohms terminating, or
bridging.
Outputs, 600-ohm line and low impedance micro-
phone level. Outputs may be used simultaneously.
VU meter calibrated f o r
+4
and
+
I 0 d b m with
range switch. Illuminated with
AC
operation.
Meter isolated from D C on line. Line output trans-
former unaffected b y up t o I 0 0 ma DC.
AC
or battery operation (with accessory battery
pack). Noiseless automatic switch-over t o battery in
event o f
AC
line failure. Battery test provision.
Low frequency roll-off switch on each channel.
Two-level headphone monitor provision designed t o
accommodate 600 t o 2,000 ohm headphones. A n y
headphones from 8 ohms t o crystal may be used.
Direct mix bus input for stacking units.
Line output terminals phase indicated.
All
connec-
tions phased.
Compact, lightweight.
U.S. Underwriters Laboratory and Canadian
Standards Association approval f o r use i n com-
mercial applications. (Applies t o M o d e l M67).
Guarantee:
This Shure product is guaranteed in
normal use t o be free from electrical and mechanical
defects for a period o f one year from the date of
purchase. Please retain proof o f purchase date. This
guarantee includes all parts and labor.
Shipping Instructions:
Carefully repack the unit
and return it prepaid t o the factory.
If
outside
the United States, return the unit t o your dealer or
Authorized Shure Service Center for repair. The unit
will be returned t o you prepaid.
S P E C I F I C A T I O N S
P E R F O R M A N C E
Frequency Response:
1-2
db
from 30 t o 20,000 Hz.
Gain:
(Outputs terminated; line 600 ohms, rnicro-
phone 150 ohms). Gain will decrease a maximum o f
5
db
with nearly exhausted battery.
Input I
Line
I
~i;rophone
- -
Low lmoedance M i c r o ~ h o n e 1150 ohms)
/
90 d b
1
30 d b
- - -
Line, Bridging or Terminating
'
1 4 0 d b
1
- 2 0 d b
Noise:
Equivalent input noise: -129
dbV
(low im-
pedance microphone, 150 ohms -300 t o 20,000 Hz.)
into 600-ohm load, a t full gain.
Equivalent input hum and noise: -125
dbV
(low im-
pedance microphone, 150 ohms- 20-20,000
Hz.)
into
600-ohm load, a t full gain.
Distortion:
Under
1 %
T.H.D. from 20 t o 20,000
Hz. a t
+
I 0 d b m out (0.5% Typical).
Control Interaction:
Under
1 %
db
with any control
.
-
com bination.
I N P U T S
Impedance
Input 1 - d for ~ c t u a l
I
Input Clipping
-30 dbV (150 ohms)
Greater than +22 dbV
<
-
Line.Terminated
I
z:
OWK;~:
1
600 ohms
I
Greater than +24 dbm
Minimum Common Mode Rejection:
100
db
with microphone input o f I 0 volts a t I 0 0 Hz.
OUTPUTS
Impedance
Output Designed For Actual
Output Clipping
Use With (Internal)
Level
Microphone Any low 0.5 Ohms 6 rnv, - 4 4 dbV
Line
impedance
microphone
*Other line impedances may be used; however, the V U meter is
calibrated for 600-Ohm line termination. See "VU Meter"
Section on Page 3.
Headphone Output:
See "Headphone" Section on
Page
3.
Temperature Range:
Operating: O°F t o 135OF (-17.8OC t o 57OC)
Storage: -20°F t o 160°F
(
-29OC t o 71
O C )
Copyright 1970. Shure Brothers I n c
27A954 (LI)
Printed in U.S.A.