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A27M -- Stereo Microphone Adapter

General Description

The Shure model A27M is a stereo microphone 

adapter designed to hold two microphones in se­

lectable positions for stereo broadcasting, 
recording or sound reinforcement. It allows two 
microphones to share one stand without losing 

independent positioning flexibility. The A27M per­

mits coincident or closely spaced mounting with 
a wide range of directional angles, and vertical 
microphone separations of 1 1/4 inches (31.8 
mm), 2 5/8 inches (66.7 mm) or 4 inches (102 
mm).

The A27M consists of two vertically stacked sec­

tions that rotate on their centers. Each contains a 
5/8"-27 threaded stud and locking ring to accept 
a variety of microphones. The bottom section 

contains a 5/8"­27 adapter for mounting on a mi­
crophone stand. A cable clamp for holding micro­

phone cables is included.

Installation

To install the A27M, follow these steps:

Summary of Contents for A27M

Page 1: ...oincident or closely spaced mounting with a wide range of directional angles and vertical microphone separations of 1 1 4 inches 31 8 mm 2 5 8 inches 66 7 mm or 4 inches 102 mm The A27M consists of two vertically stacked sec tions that rotate on their centers Each contains a 5 8 27 threaded stud and locking ring to accept a variety of microphones The bottom section contains a 5 8 27 adapter for mo...

Page 2: ...nd position the microphones for the desired response angles The top of the knurled knob contains reference marks every 45o these may be used to position the microphones at the desired angle see Figure 1 6 Tighten the knurled knob attach the microphone cables and use the supplied cable clamp to fasten the micro phone cables to the A27M 7 Raise the microphone stand to the desired height Fig ure 2 sh...

Page 3: ...dioid Axes of maximum re sponse at 135 spacing coincident ORTF French Broad casting Corporation 2 Cardioid Axes of maximum re sponse at 110 spacing 17 cm 7 in NOS Dutch Broadcast ing Foundation 2 Cardioid Axes of maximum re sponse at 90 spacing 30 cm 12 in Blumlein Pair or stere osonic 2 Bidirectional Axes of maximum re sponse at 90 spacing coincident MS Mid Side 1 Cardioid 1 Bidirectional Cardioi...

Page 4: ...or 49 7262 924 90 service hotline or contact your authorized Shure distributor This warranty does not cover abuse or misuse of the product use contrary to Shure s instruction ordinary wear and tear an act of God or unauthorized repair ...

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