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However,  because  the  30°  off-axis  response  is  smooth,  simple 

equalization  can  compensate  for  its  decreased  high  frequencies 

if necessary. The curve below shows the SM89 response at 30° 

off-axis, with the equalization that can be used to restore the high-

frequency response.

TYPICAL SM89 RESPONSE, 30 ° OFF-AXIS

Additionally,  because  of  such  off-axis  characteristics,  the  SM89 

can be used for pickup at greater angles off-axis than is possible 

with other shotgun  microphones. This feature permits deliberately 

locating the desired source up to ±30° off-axis in order to ensure 

that an undesired source is entirely off-axis and will not be picked 

up. Changes in frequency response above 1,000 Hz can then be 

compensated by simple equalization if necessary. 
Pickup  (and  cancellation)  is  symmetrical  about  the  microphone 

axis; it is unchanged when the microphone is rotated about its own 

axis. In addition to its acoustical and electrical properties, the SM89 

is extremely lightweight. This makes it easier for an operator to hold 

it on a fishpole for extended periods of time, for instance, during 

lengthy  takes. The  microphone  length  is  optimized  in  relation  to 

its  directional  characteristics  and  ease  of  handling.  Its  aircraft-

grade materials withstand rough handling, and its unique internal 

construction provides excellent wind noise rejection while protecting 

against damage to the transducer or electronics. 
The SM89 is supplied with a foam windscreen for use when the 

microphone is subject to quick boom motion, or when air conditioning 

or other indoor wind noises may be a problem. A rugged carrying 

case is also supplied. An optional accessory is a specially designed 

shock-mount virtually eliminating mechanical vibration pickup. 

The SM89 is field serviceable. The handle separates by unscrewing 

from  the  head;  the  interconnection  is  gold-plated  and  extremely 

reliable. 

ACCESSORIES

The supplied windscreen is useful under most indoor-conditions 

where minimal wind noise due to boom motion, air conditioners, or 

heater fans is present. When structure-borne mechanical vibration 

must be cancelled, the optional Model A89SM Shock-Mount can 

be used. And for mounting on a conventional microphone stand, 

use the Shure A57F Swivel Adapter.

SM89 WITH WINDSCREEN, CARRYING CASE AND 

SHOCK MOUNT ADAPTER

IMPORTANT:

 To avoid degrading the response of the SM89, 

never cover its grille perforations with anything except acoustically 

transparent windscreen material.

CERTIFICATION 

Eligible to bear CE Marking.  Conforms to European EMC 

Directive 89/336/EEC.  Meets applicable tests and performance 

criteria in European Standard EN55103 (1996) parts 1 and 2, for 

residential (E1) and light industrial (E2) environments. 

FURNISHED ACCESSORIES

Carrying Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90A4684 
Foam Windscreen . . . . . . . . . . . . . . . . . . . . . . .  RK257WS

OPTIONAL ACCESSORIES

Shock Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A89SM 
Swivel Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A57F

REPLACEMENT PARTS

Head Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R144 
Handle Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 90A3123 
RFI Filter and Plug Element . . . . . . . . . . . . . . . . .   90A3127

For additional service or parts information, please contact Shure’s 

Service department at 1-800-516-2525. Outside the United 

States, please contact your authorized Shure Service Center.

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