Shure A15AS Microphone User Manual


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©2009 Shure Incorporated
27C1915 (Rev. 7)
Model A15AS
User Guide
Printed in U.S.A.
MODEL A15AS SWITCHABLE IN-LINE ATTENUATOR
Use this balanced-line attenuator to prevent low-impedance
microphones (rated at 150 or 600 ) and high-output condenser
microphones from overloading low impedance inputs in high
sound pressure level applications. The values of attenuation can
be switch-selected for 15, 20, or 25 dB.
Use the A15AS with any low-impedance microphone, including
phantom-powered condenser microphones, such as the Shure
SM81. It can be used in-line between the microphone and its
power supply. (This model is not suitable for use with the
condenser powering system called “A-B Powering.”)
The A15AS attenuator bridges the microphone output and
allows maximum signal handling with a minimum of loading-
caused distortion or reduction in clipping level.
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