Shure A15AS User manual

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GUARANTEE

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 guar-

antee includes all parts and labor, and is in lieu of any and all other

guarantees or warranties, express or implied. There shall be no re-

covery for any consequential or incidental damages.

SHIPPING INSTRUCTIONS

Carefully repack the unit, have it insured, and return it prepaid to:

Shure Incorporated

Attention: Service Department

222 Hartrey Avenue

Evanston, IL 60202-3696

If outside the U.S.A, return the unit to your dealer or Authorized

Shure Service Center for repair. The unit will be returned to you

prepaid.

Model A15AS

User Guide

MODEL A15AS SWITCHABLE IN-LINE ATTENUATOR

This balanced-line attenuator can be used whenever the output

level of a low-impedance (rated at 150 or 600 Ω) microphone

overloads a low-impedance input. The values of attenuation can

be switch selected for 15, 20, or 25 dB.

The attenuator is optimized for use with phantom powered con-

denser microphones like the Shure Model SM81; and it can be

used in the line between the microphone and its power supply.

The A15AS is also ideal for use with any low-impedance dynamic

microphone. (This model is not suitable for use with the condens-

er powering system called “A-B Powering.”)

27B1915 (TL)

2000, Shure Incorporated Printed in Mexico

The A15AS attenuator operates by, in effect, bridging the micro-

phone output and allowing maximum signal handling with mini-

mum loading-caused distortion or reduction in clipping level.

Thus high-output condenser microphones or low-impedance dy-

namic microphones used at very high sound pressure levels can

be connected to ordinary low-impedance inputs with appropriate

attenuation for each application.

The impedance at the input end (three-socket connector*) of the

A15AS is 1,000 Ω; the impedance at the output end (three-pin

connector*) is 150 Ω. The equivalent single series simplex-pow-

ering resistance is 215 Ω; this resistance should be considered

in addition to any existing circuit resistance when using the atten-

uator.

*Designed to mate with Cannon XL series, Switchcraft A3 (Q.G.) se-

ries, or equivalent.

SPECIFICATIONS

Frequency Response

Flat, 20 to 20,000 Hz 0.5 dB

Impedance

Input: 1,000 Ω

Output: 150 Ω

Attenuation (switch selectable)

15 dB, 20 dB, or 25 dB

Case

Full magnetic shield; steel with gray enamel finish

Dimensions

19 mm (3/4in.) diameter; 114 mm (4 1/2in.) long