Shure M367E User Manual

MODEL M367 AND M367E MICROPHONE MIXERS

The Shure Model M367 is a six-input, portable microphone
mixer/remote amplifier specifically designed for professional ap­plications in electronic news gathering (ENG), electronic field
production (EFP) and general audio mixing. It sets a new stan­dard for portable mixer performance and features. Exceptionally
low–noise design makes the M367 ideal for use with digital trans­mission links and digital video/audio recording media, including
ISDN and DAT. Compact and rugged, the M367 is built to with­stand the most demanding field production conditions. In addi­tion, its excellent performance, versatility and features make it an
ideal choice for studio, remote, or sound reinforcement use, and
as an add-on mixer for expanding existing facilities.

Each M367 handles up to six microphones or line-level sig­nals. Any high-quality, low-impedance, balanced microphone
using a dynamic or condenser* transducer (including wireless
and shotgun types) can be used. Additional M367 or other Shure
mixers can be linked using the rear–panel mix bus jacks.

The M367 is supplied with rubber feet, detachable power cord,
and spare power line fuse. Model A367R is an optional rack
mount kit enabling the M367 to be mounted in a standard 483
mm (19–inch) audio equipment rack (two rack units).

The M367 is supplied for operation at 100–120 Vac, 50/60 Hz,
and the M367E for operation at 220–240 Vac, 50/60 Hz. Each
model is internally switchable to the other’s operating voltage
range.

*Self-powered or operable on 12 or 48 Vdc phantom power.

Features

 Exceptionally quiet design, suitable for use with DAT, record-

able CD, and other digital formats

 Extended frequency response of 20 Hz to 20 kHz
 Dynamic range greater than 100 dB
 Transformer–balanced inputs and outputs for superior rejec-

tion of RFI and electromagnetic hum

 Six selectable mic/line inputs
 Selectable mic/line output and dedicated line output
 Metal XLR input and output connectors
 Wide–range input gain controls handle hot signal levels with-

out attenuators

 48 V or 12 V phantom power for condenser microphones
 Switchable low-cut filters on each input
 Peak indicator LED on each input

Model M367 AND M367E User Guide

 Professional mechanical VU meter—LED backlighting for

high reliability , no lamp replacement

 Bi–color output LED shows output limiting and peak indication
 Output peak limiter with switchable threshold
 1 kHz tone oscillator
 Mix bus jack to link M367s or other mixers
 Balanced Mix Bus connection to other M367s
 Monitor input via Phones push/pull control
 Headphones volume control
 1/4” and 3.5 mm jacks for stereo headphones
 Customized operation via internal DIP switches, trim pots, and

optional alternate wiring

 Regulated voltage rails (±15 Vdc) provide exceptional head-

room

 Power-on LED
 Battery check switch and low battery warning indication
 AC power operating range from 100 to 120 volts, 50/60 Hz or

220–240 Vac, 50/60 Hz

 Soft-touch, color-coded control knobs with raised position indi-

cators

 Rugged all metal chassis with protective end caps
 Detachable ac power cord
 Backup/field operation powering with two 9–volt batteries
 Automatically and silently switches to battery operation should

ac voltage fail

 Designed and manufactured in U.S.A. with legendary Shure

reliability and performance

IF YOU’VE USED THE M267...

Your new M367 mixer contains numerous features and im­provements not found in the M267 model. If you don’t have the
time or inclination to read this informative data sheet, these fea­tures are identified in the box below . You will then be familiar with
the most important new capabilities of your M367.

•

12–, 48–volt phantom power

•

Input clipping LEDs

•

Detachable power cord

•

Two XLR outputs

•

Side battery compartment

•

Power–on LED

•

Headphones monitor circuit

•

Output peak/limiter LED

•

Selectable mix bus, balanced for M367s

•

Adjustable limiter threshold

•

Meter LED backlighting

•

VU lamp mode selector

•

Monitor input sensitivity selector

•

Program/monitor input selector

2000, Shure Incorporated
27A8511 (TG)

1

Printed in U.S.A.

FRONT PANEL CONTROLS AND INDICATORS (Figure 1)

Á

Á

Á

1. Input Gain Control: Adjusts the gain level of each input chan-
nel. Rotating the knob counterclockwise reduces gain

and

raises the input clipping point. Use a low control setting to han­dle “hotter” input signals without distortion. With the new M367
input circuit, microphones with a “hot” output can be used with­out an in-line pad (attenuator).

For best performance, adjust each Input Gain Control so the
associated Input Peak LED illuminates red only on the loudest
signal peaks.

1 kHz Tone Oscillator (Channel 1): Activated by pulling out
Input Channel 1 Gain knob.

Note:

Tone level is adjusted using the Input 1 control

and

the
Master control. Use this tone to send a reference signal level
to any device connected to an M367 output.

2. Input Low-Cut Filter Switch: Provides low–frequency rolloff
to reduce wind noise and rumble. When using the filter, the fre­quency response is down 7 dB at 150 Hz. Rolloff slope is 6 dB
per octave.

3. Input Peak LED: Illuminates red if input signal reaches 6 dB
below clipping (distortion).

4. Limiter Switch: Activates a fast–acting, peak–responding
limiter. The limiter helps prevent overload distortion from unex­pected loud input signals. Limiter action is indicated by the
Output Peak/Limiter LED, which will illuminate green. The

0.1-second release time is optimized for speech signals; an in­ternal modification can provide a 1-second release time for
music signals (see

Internal Modifiable Functions

).

5. Output Level Meter: The illuminated mechanical VU meter
provides reliable operation and excellent visibility in all envi­ronmental and ambient lighting conditions.The meter re­sponse approximates true VU characteristics (about 300 ms
rise and fall, 1% to 5 % overshoot). If a slower response is de­sired, see

Internal Modifiable Functions

. 0 VU is switchable
between +4 and +8 dBm output level by an externally accessi­ble switch (see

Internal Switches and Controls

).

An LED array illuminates the meter, eliminating lamp replace­ment. The meter is illuminated at all times when the mixer is
ac–powered. With dc power, the meter illumination is activated
by the Batt Check switch.

6. Output Peak/Limiter Bi–Color LED: Illuminates red when
output signal reaches a factory preset peak level of +12 dBm

(6 dB below clipping). If the limiter is switched on, the LED illu­minates green to indicate limiter operating threshold has been
reached. The LED will still illuminate red if the preset peak level
is reached before the limiter activation point is reached.

7. Battery Check Switch: When pressed, the status of the two
9V batteries is indicated on the VU meter: an indication in the
red portion of the scale indicates adequate battery power.
When the meter reads 0 VU, the batteries are at about 13.5
volts. A low battery condition is also indicated when the Pow­er–On LED flashes.

When using ac power (no batteries in

compartment), the battery check gives no indication.
When the M367 is battery–powered and the switch is pressed

momentarily, the meter illumination turns on for about 10 se­conds. Changing meter illumination action to toggled (meter il­lumination stays on until the switch is pressed again) can be
accomplished via internal DIP switch 6 (see

and Controls
Note:

for instructions).

The audio signal is not interrupted when the Battery

Internal Switches

Check switch is pressed.

8. Power–On/Off Switch: Turns the mixer on and off.

9. Power–On LED: Illuminates green to indicate power is on.
Flashes to indicate low batteries, typically when about 30 min­utes of operation remains.

10. Headphones Gain Control: Rotates to adjust headphones
volume level.

WARNING

The headphones circuit is capable of producing
high volume levels that can damage the user’s
hearing. Make sure headphone volume setting
is low (full CCW) before putting headphones on.

Pull/Monitor Switch: When knob is pulled outward, audio sig­nal from Monitor In jack is sent to headphones output, inter­rupting the program signal to the headphones. If an attenuated
program signal with the monitor signal is desired, refer to the

Internal Switches and Controls

section.

11. Headphones Outputs: Stereo 1/4–inch phone jack and ste­reo 3.5 mm miniature phone jack may be used separately, si­multaneously , or as auxiliary feeds to other equipment.

12. Master Gain Control: Sets mixer output gain. Set to 0 dB
position for unity gain output stage.

2 3 4

PEAK

5

3

0

10

PULL/1KHz

PEAK

5

7

3

0

10

21

PEAK

5

0

7

10

7

3

1

5

PEAK

5

3

0

10

PEAK

5

7

3

7

3

0

543

0

10

PEAK

5

10

6

7

-20

-

LIMITER

OUT IN

0

+12

MASTER

12

FRONT PANEL CONTROLS AND INDICATORS

FIGURE 1

2

6 7 8 9

BATT

CHECK

PEAK

VU

M367

11

POWER

ON

PHONES

PULL/MONITOR

10

1 2 3 4

100/120 VAC 50/60 Hz 100 mA

SPARE

LINE

MIC

OUTPUT

LINE PHANTOM

OFF ON

MONITOR

IN

MIC

LINE

6

MIC

5

LINE

LINE

MIC

4321

INPUT

MIC

LINE

MIC

LINE

9 8 7 6 5

REAR PANEL CONNECTORS AND CONTROLS

FIGURE 2

REAR PANEL CONNECTORS AND CONTROLS (Figure 2)

1. Mic/Line Level Output Switch: Selects Mic or Line level to

BALANCED

match proper input level of the device connected to the M367
output. Mic signal level is typically 0.0001 – 0.003 V; Line sig­nal level is typically 0.1 – 3.0 V.

2. Phantom Power Switch: Activates 12–volt phantom power

TO M367 #1 TO M367 #2

UNBALANCED

on each input set to Mic Level input. If needed, 48–volt phan­tom power is available through activation of internal DIP switch
No. 7 (see

Note:

phantom power.

3. Mic/Line Level Input Switches 1–6: Selects Mic or Line to
match the incoming signal level. Mic signal level is typically

0.0001 to 0 .003 volts and Line signal level is typically 0.1 to

3.0 volts. In the Line level position, phantom power is discon­nected from the inputs.

4. M267/M367 Mix Bus Level Switch: Selects a matching mix
bus level for the mixer connected to the M367. The M267 posi­tion is used when a Shure M267 (or Shure FP42, FP51, M67
or SE30) is connected; the M367 position is used when anoth­er M367 (or Shure FP32A) is connected to the Mix Bus.

In the M267 position, mixer output noise may in-

crease up to 30 dB, depending on the Master out-

put control setting. Unless required for mix bus hook-

up with an M267 or similar mixer,

5. Mix Bus Jack: Allows two mixers to be connected together.
The Mix Bus connection is “two–way” and pre–Master. When
two M367 mixers are connected via the Mix Bus, all 12 inputs
appear at both mixers’ outputs. The Master Gain control of ei­ther M367 can be adjusted without affecting the other mixer’s
output. This provides the equivalent of a 12–input mixer with
two separate Master output sections.

NOTE:

when they are connected via the Mix Bus. Increase the Master
Gain to compensate.

The M367 has a balanced mix bus for optimum performance
when connected to another M367. Use a mix bus cable with

1

two
For mix bus connection to another Shure mixer, construct a
mix bus cable with a
sleeve—ground) and the appropriate connector for the other
mixer’s mix bus jack (see Figure 3).

Internal Switches and Controls

for instructions).

Balanced dynamic microphones will not be damaged by

IMPORTANT

leave the Mix Bus

Level switch in the M367 position.

The output level of both M367 mixers will drop by 6 d B

/4–inch stereo (tip, ring, sleeve) plugs for this application.

1

/4–inch mono phone plug (tip—signal,

TO M367 TO M267

MIX BUS CONNECTIONS

FIGURE 3

6. Channel Inputs: Six female XLR inputs are transformer–bal­anced to provide superior rejection of hum, RFI, and other in­terference.

7. Monitor In Jack: Designed to accept line level signals. This
mono jack (tip—signal, sleeve—ground) provides a “tape re­turn” input or a communications channel input. The signal ap­pears only in the M367 headphones circuit. Pulling the Phones
gain control (Pull/Monitor switch) routes the Monitor In signal
to the headphones. The M367 audio is
phones when the Monitor In switch is activated. M367 pro­gram signal mixed with the Monitor In signal can be accom­plished via internal DIP switch 4 (see

Controls

for instructions).

The Monitor In jack can be modified to accept a stereo input
and provide a stereo sum monitor signal (see

able Functions

section).

8. Mixer Output: Two male XLR outputs are transformer–bal­anced. The Line output is preset to line level (the line level out­put can be modified to a true 600 Ω output impedance or
changed to mic level if desired [see

tions

section]). The switchable output may be either micro-

Internal Modifiable Func-

phone or line level.

9. 100/120 VAC, 50/60 Hz Power Connector (M367): The
three–pin power connector provides for connection of the sup­plied power cord to 100 to 120 Vac, 50/60 Hz power outlets.

220/240 VAC, 50/60 Hz Power Connector (M367E): The
three–pin power connector provides for connection of the sup­plied power cord to 220 to 240 Vac, 50/60 Hz power outlets.

.125A, 250V Time Delay Fuse (M367): Directly below the
power connector is a slide–out compartment containing two
power line fuses. The outer (toward you) fuse is a spare.

.063A, 250V Time Delay Fuse (M367E): Directly below the
power connector is a slide–out compartment containing two
power line fuses. The outer (toward you) fuse is a spare.

LEVEL

LINE

MIC

M267 M367

MIX

BUS

N.C.

not

heard in the head-

Internal Switches and

Internal Modifi-

3