Shure M267 User Manual 2

Shure

Brothers Incorporated

222 Hartrey A

venue

Evanston IL 60202-3696 U.S.A.

Model M267 User Guide

GENERAL

The

hur

e M

ode

plifier

pecificall

y d

l M267 i

esigne

s a microphon

d for p

rofessiona

e m

ixer-remot

l a

pplications

e a . T

excellent performance, versatility and features of this com-

ompac

t c

onsol

plete,

mote,

r s

expanding

and v

audio

oun

ide

d r

xistin

e make i

einforcemen

g f

acilities

o tape r

ecorder

t a

n i

t use, and a

. I

t i

s also i

s t

o p

rovid

dea

deall

l c

s a

e m

hoic

n a

y s

ultipl

e for s

dd-o

uite

d for use w

e m

tudio

, r

n m

ixer for

icrophone

ith

inputs.

Features:

• Wide,

•

• Feedback-type

•

• Built-in

flat frequency response and extremely low distor

up to +18 dBm output

tion Extremely low noise and RF susceptibility Four switchable microphone- or line-level balanced-line

with i

inputs

witches

off

levels

ndividua

. M

and dynamic range

l gain c

ontrol

s and l

ow-frequenc

UMET A input

L s

hieldin

g o

n i

npu

t t

ransformers

gain controls for maximum clipping

y r

oll-

Output switchable for line or microphone level

switchable peak limiter cuts output overload

tortion,

adapts to power supply voltage

dis

• LED indicator shows limiter operation or overload with defeated

limiter

•

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

be additional unbalanced line feed to drive

can corder

or power amplifier

•

Direct mix bus for stacking units

a tape re

• Automatic muting prevents speaker damage during

turn-on

and -of

• 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 case

tant

• Internally

selectable 120 or

240 V

ac, 50/60 Hz operation

• Underwriters’ Laboratories Listed and Canadian Stan-

Association listed as Certified

dards

SPECIFICATIONS

Frequency Response

30 Hz to 20,000 Hz, ±2 dB

Voltage Gain

(at 1,000 Hz)

(Outputs terminated: line 600  microphone 150  mix

3.3 k

bus

Low-Impedance

Microphone (150 Line Mix Bus

 headphone 200 , tip-sleev

Input

Line Microphone Mix

91 dB 41 dB 24 dB

)

40 dB

55 dB

OUTPUT

–9 dB

5 dB

e and r

Inputs

IMPEDANCE

Designed

Input

icrophone

Line Less

Mix Bus

∗Depending

for Use

With

19 to 6

than10 k

3.5 k

on input control setting



Actual

(Internal)

1 k

66 k



3.5 k



Input

Clipping Level

–32 dB

5 d

BV∗

–

5 m

V t

o 0.56 V

+20 dBV

+7 dBV (2.2 V)

ing-sleeve

Bus

–27 dB

– –

V t

)



1997, Shure Brothers Incorporated

27A8376

(QE)

Printed in U.S.A.

Outputs

Headphone Output Clipping Level

IMPEDANCE

Designed for

Use W

Output

Microphone Any low imped-

anc

Mix Bus

Head

phones

recommended

Line

∗∗

Depending on level control setting

ith

e m

icrophone

input

3.5 k



8 - 2000



200

600 150

Actua

(Internal)

0.5

3.5 k



400

 

3 k ∗∗

Output

Clipping Level

–34 dB

0 m

–8 dBV

(400 mV)

+10 dBV

(3.3 V)

+18

(6.2 V)

Noise

Equivalent Input Hum and Noise: –126 dBV (low

impedance 600  load

Output Noise

microphone, 150  - 20-20,000 Hz) into a at full gain

: –75 dBV (

maste

r c

ontro

l f

ull

y c clockwise), –53 dBV (master fully clockwise), (input controls down

, 3

00-20,00

0 H

Output Hum and Noise: –70 dBV (master control down), –51 dBV (master control up) (input controls

down,

0-20,00

0 H

Distortion

0.35% or less THD from 30 to 20,000 Hz at +15 dBm output;

0.5% o

r less I

M d

istortio

n u

p t

o +15 dBm o

level

dBm

ounter-

utput

3.16V (+10 dBV) into 200

one Oscillator



1,000 Hz, 1.5% or less THD

Phantom Power

30 Vdc open-circuit, 3.3 k series resistance, input switches

Operating V

in MIC position only

oltage

Ac Operation: 120 or 240 volts ±10%, 50/60 Hz,

9.5W,

internally switchable

Operation:

27 volts nominal at 15



mA typical nosignal, 18 mA typical at 0 VU (+4 dBm) output with headphone

Battery

teries

load; 21.5 volts minimum

life:

approximately 20 hours with alkaline

at +4 dBm output

in continuous use; three 9-volt batteries, type NEDA 1604A (Duracell MN1604 recommended)

 Supplied wired for 120 Vac operation (See Service section for 240

ac operation)

Temperature

Range

Operating: –18o to 57o C (0o to 135o F) Storage: –29

to 71oC (–20o to 160o F)

bat

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 the outputs, even for prolonged periods, will cause no damage; microphone inputs will not be dam aged by s

ignal

s u

p 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 Recovery T

ime:

3 msec typical

ime:

500 msec typical

Peak Indicator

Lights

6 dB below clipping or at onset of limiter

action

Dimensions

See Figure 1

Weight

Net: 2.3 Packaged:

Certifications

Listed

y U

Canadian

309

(12

in.)

FIGURE 1

kg (5 lb 2 oz)

3.2 kg (7 lb 2 oz)

nderwriters

tandard

’ L

s A

ssociatio

68.8mm 23/32 in.)

aboratories

n a

6.3 mm (1/4 in. )

, I

s C

nc., an

ertified

229 mm

(9 in.)

d l

iste

d b

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