Shure SM50 User Guide

2 2 2 H A R T R E Y A V E . , 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

General: The Model SM50 is a rugged, omnidirectional

microphone	built	to withstand the severest field use.
It provides	very	natural and intelligible voice reproduc-

tion and unusual freedom from annoying wind and

breath noises. Very comfortably hand-held,	or mounted
in the slip-in stand adapter, the SM50 is	ideally suited

to remote interviews, news and sports pickups, and a variety of field and studio applications.

This Microphone Features:

nSmooth, natural sounding response from 40 to 15,000 Hz-slightly tailored for the utmost in intelligibility with an excellent feeling of pres-

ence.

nHighly effective built-in wind and breath filter -virtually eliminates wind noise, “blasting” and “pop”. Easily removed for replacement or cleaning.

n	Comfortable	size, lightweight, well balanced
	for handheld	use.

nRugged construction to provide completely dependable operation under all operating conditions.

nVersatility-equally at home in the field or

studio-handheld, or on a stand.

n“Veraflex” diaphragm for smoother response and low handling noise.

SPECIFICATIONS

Type:

Dynamic.

Frequency Response:

40 to 15,000 Hz. (See Figure A)

Polar Pattern:

Omnidirectional. (See Figure B)

Microphone Rating Impedance:

Dual. 50 ohms and 150 ohms for connections into microphone inputs rated at 25 to 250 ohms (Connected for 150 ohms when shipped), See paragraph on impedance changing.

Output Level:

1,000 Hz response.

Model SM50

50 ohms

Open circuit voltage . . . . . . -84.5 db* (.059 mv) Power level . . . . . . . . . . . . . -57.0 db**

EIA Microphone Rating

Gm (sensitivity) . . . . . . . . -149.5 db***

Model SM50 150 ohms

Open circuit voltage . . . . . . -78.5 db* (.118 mv) Power level . . . . . . . . . . . . . -57.5 db**

EIA		Microphone Rating
	Gm (sensitivity) . . . . . . . . -150 db***
*	0	db = 1 volt per microbar
**	0	db = 1 milliwatt with 10 microbars

*** 0 db = EIA Standard SE-105, August 1949

Cable:

20 foot (6.1 meter) two-conductor shielded Broadcast type.

Connector:

Professional three-pin male audio connector on microphone designed to mate with Cannon XL series, Switchcraft A3 (Q.G.) series or equivalent connector on cable.

Case:

Aluminum and zinc die-cast.

Case Finish:

Textured dark gray enamel.

Swivel Adapter:

Positive action 90° swivel to mount microphone to stand on fixture with 5/8”-27 threads.

Dimensions:

See Figure D.

Net Weight Less Cable:

8 ounces (227 grams)

Shipping Weight:

2 pounds, 5 ounces (1049 grams)

Instructions for changing to 50 ohm impedance:

See Figures C and D.

1.Remove male insert at the receptacle end of the microphone by turning the set screw in (counterclockwise).

2.Disconnect the RED lead from pin #3.

3.Solder the ORANGE lead to pin #3.

4.Insulate end of the RED lead with tape.

5.Re-assemble male insert into receptacle and seat set screw securely in place by turning out (clockwise)

Printed in U.S.A.

( O V E R )

Guarantee: This Shure product is guaranteed in normal use to be free from electrical and mechanical defects for a period of one year from the date of purchase. Please retain proof of purchase date. This guarantee includes all parts and labor.

Shipping instructions: Carefully repack the unit and return it prepaid to the factory. 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.

NOTE: Windscreen assembly is unitized for ease of cleaning or replacement. To remove, unscrew from microphone body.

To	clean,	flush	with	mild detergent, rinse thoroughly
and	allow to	dry	before	replacing.

FIGURE B

INTERNAL CONNECTIONS

FIGURE C

OVER-ALL DIMENSIONS

FIGURE D

ARCHITECT’S SPECIFICATION

The microphone shall be Shure Model SM50 or equivalent moving coil (dynamic) microphone with a frequency range of 40 to 15,000 Hz. The unit shall have an omnidirectional polar characteristic. The microphone shall have available impedances of 50 ohms and 150 ohms for connections into microphone inputs rated at 25 to 250 ohms. The microphone output shall be:

50 ohm impedance. . . . . . . -57.0 db (0 db = 1 milliwatt with 10 microbars)

150 ohm impedance. . . . . .-57.5 db (0 db = 1 milliwatt with 10 microbars)

The microphone rating Gm (sensitivity) at 1,000 Hz. shall be within 3 db of the following levels:

50 ohms. . . . . . . . . . . . . .-149.5 db 150 ohms. . . . . . . . . . . . . .-150.0 db EIA Standard SE-105 August, 1949

The microphone shall be provided with a swivel adapter adjustable through 90° from vertical to horizontal and capable of being mounted on a stand having a 5/8"-27 thread. The microphone shall have a detachable 20 foot, (6.1 m), two-conductor, shielded cable equipped with a three-pin audio connector designed to mate with Cannon XL series, Switchcraft A3 (Q.G.) series, or equivalent connector. The over-all dimensions shall be 6-37/64 (167.1 mm) in length, and 1-33/64 (38.5 mm) in diameter.

REPLACEMENT PARTS

The following replacement parts, and accessories may be ordered through your authorized Shure Professional Microphone Distributor or from Shure Brothers Incorporated.

D E S C R I P T I O N

S H U R E P A R T N O .

Windscreen Assembly . . . . . . . . . . RK144G

Cartridge . . . . . . . . . . . . . . . . . . . R12

Case Assembly . . . . . . . . . . . . . . . . RK145C

Cable . . . . . . . . . . . . . . . . . . . . . . . . C50

Desk Stand . . . . . . . . . . . . . . . . . . . S33P

Swivel Adapter . . . . . . . . . . . . . . . . A25B

Plug Element . . . . . . . . . . . . . . . . . . RK121P