Shure M267 Microphone Mixer

User Manual: M267

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FOD NO. 09055
1997, Shure Brothers Incorporated
Printed
in U.S.A.
Page 1 of 2
GENERAL
Th
e S
hur
e M
ode
l M
26
7 i
s a m
icrophon
e m
ixer-remot
e a
m-
plifier specifically designed for professional applications. The
excellent performance, versatility and features of this com-
plete,
c
ompac
t c
onsole mak
e i
t a
n i
deal choic
e f
or studio, re-
mote,
o
r s
oun
d r
einforcemen
t u
se
, a
n
d a
s a
n a
dd-o
n m
ixe
r f
or
expanding
e
xistin
g f
acilities
. I
t i
s a
ls
o i
deall
y s
uite
d f
o
r u
se
w
ith
audi
o a
n
d v
ide
o t
ap
e r
ecorder
s t
o p
rovid
e m
ultipl
e m
icrophone
inputs.
Features:
Wide,
flat frequency response and extremely low distor
-
tion
up to +18 dBm output
Extremely low noise and RF susceptibility
Four
s
witchabl
e m
icrophone
- o
r l
ine-leve
l b
alanced-lin
e i
n-
puts
w
it
h i
ndividua
l g
ai
n c
ontrol
s a
n
d l
ow-frequenc
y r
olloff
switches.
M
UMETA
L s
hieldin
g o
n i
npu
t t
ransformers
Feedback-type
input gain controls for maximum clipping
levels
and dynamic range
Output switchable for line or microphone level
Built-in
switchable peak limiter cuts output overload
dis
-
tortion,
adapts to power supply voltage
LED indicator shows limiter operation or overload with
limiter
defeated
Externally adjustable limiter threshold (–4 to +18 dBm)
VU meter calibrated for +4 and +8 dBm with range
switch.
Illuminated with ac operation
Ac or built-in battery operation. Noiseless automatic
switchover to battery in case of ac line failure. Battery
test
without program interruption
Front-panel headphone level control and monitor jack
drives almost any stereo or mono headphones; output
can
be additional unbalanced line feed to drive a tape
re
-
corder
or power amplifier
Direct mix bus for stacking units
Automatic muting prevents speaker damage during
turn-on
and -of
f
Low distortion, high-stability tone oscillator for line test
and
level checks
All
connections phased. Line
output terminals phase-in
-
dicated
Compact and lightweight, with rugged, abrasion-resis-
tant
case
Internally
selectable 120 or 240 V
ac, 50/60 Hz operation
Underwriters’ Laboratories Listed and Canadian Stan-
dards
Association listed as Certified
SPECIFICATIONS
Frequency Response
30 Hz to 20,000 Hz,
±
2 dB
Voltage Gain
(at 1,000 Hz)
(Outputs terminated: line 600  microphone 150  mix
bus
3
.
3 k
 headphone 200
,
t
ip-sleeve
a
n
d r
ing-sleev
e )
Inp t
OUTPUT
Input Line Microphone Mix
Bus
Low-Impedance
Microphone (150
)
91 dB 41 dB 24 dB
Line
40 dB –9 dB –27 dB
Mix Bus
55 dB
5 dB
– –
Inputs
IMPEDANCE
Input
Designed
for Use
With
Actual
(Internal)
Input
Clipping Level
M
icrophone
19 to 6
00
1k–32
d
B
V t
o
–
5 d
BV∗
(2
5 m
V t
o 0
.5
6 V
)
Line Less
than10 k
66 k
+20 dBV
Mix Bus
3.5 k
3.5 k
+7 dBV (2.2 V)
∗Depending
on input control setting
Shure
Brothers Incorporated
222 Hartrey A
venue
Evanston IL 60202-3696 U.S.A.
Specification Sheet
MODEL M267 MICROPHONE MIXER
Phone:
800-257-4873 Fax: 847-866-2279
In Europe, Phone: 49-7131-72140 Fax: 49-7131-721414
Internationally
, Phone: 847-866-2200 Fax: 847-866-2585
W
eb Address: http://www
.shure.com
FOD
NO. 09055
E
1997, Shure Brothers Incorporated
Printed
in U.S.A.
Page 2 of 2
Outputs
IMPEDANCE
Output
Designed for
Use W
ith Actua
l
(Internal) Output
Clipping Level
Microphone Any lo
w i
mped-
anc
e m
icrophone
input
0.5 W–34
d
B
(2
0 m
V)
Mix Bus
3.5 k
W
3.5 k
W
–8 dBV
(400 mV)
Head
-
phones
8 - 2000
W
200 W
recommended
400
Wto
3 kW∗∗
+10 dBV
(3.3 V)
Line 600 W150 W+18
dBm
(6.2 V)
∗∗
Depending on level control setting
Noise
Equivalent Input Hum and Noise:
–126 dBV (low im
-
pedance
microphone, 150
W
- 20-20,000 Hz) into a 600
Wload
at full gain
Output Noise: –75 dBV (master control fully counter-
clockwise), –53 dBV (master fully clockwise), (input con-
trols
d
own
, 3
00-20,00
0 H
z)
Output
H
u
m a
n
d N
oise
:
–7
0 d
B
V (
maste
r c
ontro
l d
own),
–51 dBV (master control up) (input controls down,
20-20,000
H
z)
Distortion
0.35%
o
r l
es
s T
H
D f
ro
m 3
0
t
o 2
0,00
0 H
z a
t +
1
5 d
B
m o
ut-
put;
0
.5
% o
r l
es
s I
M d
istortio
n u
p t
o +
1
5 d
B
m o
utpu
t l
evel
Common Mode Rejection
65 dB minimum with input of –20 dBV at 100 Hz
Control Interaction
Less than 1 dB with any control combination
Overload and Shorting Protection
Shorting
t
h
e o
utputs
, e
ven
f
o
r p
rolonge
d p
eriods
, w
il
l c
ause
no
d
amage
; m
icrophon
e i
nput
s w
il
l n
o
t b
e d
amage
d b
y s
ig-
nals
up t
o 3 v
olts
Lo-Cut Filters
6 dB/octave rollof
f at 150 Hz
Limiter
Threshold:
+15 dBm (line output level; adjustable
from –4 to +18 dBm)
Attack T
ime:
3 msec typical
Recovery T
ime:
500 msec typical
Peak Indicator
Lights 6 dB below clipping or at onset of limiter action
Headphone Output Clipping Level
3.16V (+10 dBV) into 200
W
T
one Oscillator
1,000 Hz, 1.5% or less THD
Phantom Power
30 Vdc open-circuit, 3.3 kW series resistance, input
switches
in MIC position only
Operating V
oltage
Ac
Operation:
120 or 240 volts
±
10%, 50/60 Hz, 9.5W
,
internally
switchable
[
Dc
Operation:
27 volts nominal at 15 mA typical no-sig
-
nal, 18 mA typical at 0 VU (+4 dBm) output with head-
phone
load; 21.5 volts minimum
Battery life: approximately 20 hours with alkaline bat-
teries at +4 dBm output in continuous use; three 9-volt
batteries,
type NEDA 1604A (Duracell MN1604 recom
-
mended)
[Supplied
wired for 120 V
ac operation (See Service section for 240
Vac
operation)
Temperature
Range
Operating: –18o
to 57
o
C (0
o
to 135
o F)
Storage: –29o
to 71
o
C (–20
o
to 160
o F)
Dimensions
See Figure 1
309
mm
(12
5/32
in.)
68.8mm
(2
23/32
in.)
6.3 mm
(1/4
in. )
229 mm
(9 in.)
FIGURE 1
Weight
Net: 2.3
kg (5 lb 2 oz)
Packaged:
3.2 kg (7 lb 2 oz)
Certifications
Listed by Underwriters’ Laboratories, Inc., and listed by
Canadian
S
tandard
s A
ssociatio
n a
s C
ertified
Specification Sheet
MODEL M267 MICROPHONE MIXER

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