Shure SM77 User Guide

GENERAL

The Shure SM77 STARMAKER™ microphone is a
small, lightweight, extremely rugged dynamic unit with
a cardioid (unidirectional) pickup pattern and a smooth,
wide frequency response. The microphone is available
in ebony vinyl enamel finish.

Because of the feedback rejection of the SM77 car­dioid pickup pattern, the microphone is suitable for
sound reinforcement applications or other uses where
room acoustics or ambient noise is a problem as well as
for handheld or stand mounted use in broadcast and
recording studios. The microphone can be used for

voice or instrument pickup, and for closeup vocals with
the pop protection of the accessory windscreen.

The microphone has a tailored low-frequency rolloff

and a gentle mid-frequency presence peak to enhance

intelligibility of speech and singing.

The SM77 microphone is supplied as Model SM77EB­LC, ebony vinyl enamel finish, without a cable. The unit
is supplied with a Model A25B Swivel Adapter.

For superior wind and pop protection, when used out­doors or for closeup vocals, an accessory windscreen is
available as Model A2WSA-BK. Also recommended is
the Shure C25E, a 7.6m (25 ft) TRIPLE-FLEX® two­conductor shielded cable with 3-pin XLR audio connec­tors; the microphone connector is finished in black to
complement the SM77.

Microphone Features:

Uniform cardioid pickup pattern for excellent sup­pression of feedback and rejection of ambient room
noise

MODEL SM77

UNIDIRECTIONAL DYNAMIC MICROPHONE

SPECIFICATIONS

Type

Dynamic

Frequency Response

50 to

15,000 Hz (see

TYPICAL FREQUENCY RESPONSE

Polar Pattern

Cardioid (unidirectional), symmetrical about axis,
uniform with frequency (see Figure 2)

Figure 1)

FIGURE 1

Suitable for recording studio, broadcast, or sound
reinforcement use

Small, lightweight, and extremely rugged with shock
mounted cartridge for quiet operation

Can be handheld or stand mounted-all models sup­plied with accessory slip-in swivel adapter

TYPICAL POLAR PATTERNS

Attractive black vinyl enamel finish is durable and
easy to clean

Impedance

FIGURE 2

Microphone rating impedance is 150 ohms (250 ohms

Accessory windscreen available for pop protection

outdoors or in closeup use

222 HARTREY AVENUE, EVANSTON, ILLINOIS 60202-3696 U.S.A. l TELEPHONE: [phone] l CABLE: SHUREMlCRO

Copyright 1986, Shure Brothers Inc.
27A2234 (FB)

actual) for connection to microphone inputs rated at
19 to 300 ohms

Printed in U.S.A.

Output Level (at 1,000 Hz)

Open Circuit Voltage*

. . . . . . . . . - 77.5 dB (0.13 mV)

Power Level** . . . . . . . . . . . . . . -57.5 dB

*0 dB = 1 volt per microbar

**0 dB = 1 milliwatt per 10 microbars

Phasing

Positive pressure produces positive voltage on pin 2
with respect to pin 3 (see Figure 3)

CARTRIDGE

PROFESSIONAL THREE-PIN
AUDIO CONNECTOR

ARCHITECTS SPECIFICATIONS

The microphone shall be a moving-coil (dynamic) type
with a frequency response of 50 to 15,000 Hz. The unit
shall have a cardioid polar characteristic. The cancella­tion at the sides shall be approximately 6 dB, and the
cancellation at the rear shall be greater than 15 dB. The
microphone shall have a rated impedance of 150 ohms
for connection to microphone inputs rated at 19 to 300
ohms. The microphone output shall be -57.5 dB where
0 dB equals 1 milliwatt per 10 microbars.

The microphone shall be provided with a swivel
adapter adjustable through 90° from vertical to horizon­tal. The microphone swivel adapter shall mount on a
stand having a 5/8”-27 thread. The overall dimensions of
the microphone shall be 140 mm (5-½ in.) in length and

32 mm (1-¼ in.) in diameter.

INTERNAL CONNECTIONS

FIGURE 3

Connector

Professional three-pin audio connector* in

microphone

*Designed to mate with Cannon XL series, Witchcraft A3 (Q.G.) series or

equivalent connector.

Swivel Adapter

Positive action, adjustable through 90° from vertical
to horizontal, suitable for mounting on stand with
5/8”-27 thread

Case

Aluminum and ARMO-DUR® with steel mesh screen;
ebony vinyl enamel finish

Dimensions

See Figure 4

OVERALL DIMENSIONS

FIGURE 4

Net Weight (less cable)

168 grams (6 oz)

Packaged Weight

0.88 kg (1 lb, 15 oz)

The microphone shall be the Model SM77 or

equivalent.

FURNISHED ACCESSORY

Swivel Adapter . . . . . . . . . . . . . . . . . . . . . . . . .

OPTIONAL ACCESSORIES

Windscreen
Desk Stand

Isolation Mount . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . A2WSA-BK

. . . . . . . . . . . . . . . . . . . . . . . .

A55M, A55HM

Dual Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cable:

Cartridge
Plug Element

GUARANTEE

7.6m (25 ft) . . . . . . . . . . . . . . . . . . . . . . . .C25E

REPLACEMENT PARTS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . .

A25B

S33B, S39A

A25M

R140

90A1984

This Shure product is guaranteed in normal use to be
free from electrical and mechanical defects for a period
of one year from date of purchase. Please retain proof
of purchase date. This guarantee includes all parts and
labor. This guarantee is in lieu of any and all other
guarantees or warranties, express or implied, and there
shall be no recovery for any consequential or incidental

damages.

SHIPPING INSTRUCTIONS

Carefully repack the unit, have it insured, and return it

prepaid to:

Shure Brothers Incorporated
Attention: Service Department
222 Hartrey Avenue
Evanston, Illinois 60202-3696

If outside the United States, return the unit to your
dealer or Authorized Shure Service Center for repair.
The unit will be returned to you prepaid.