Shure 1976 catalogue circuitry

Page 1

F0r Sound Reinforcement
Recording, _
&' Imad casting

Page 2

5: -® Micrnnnnne Modifiers

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SHURE BROIHERS. INC

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Model
A15A

A15 SERIES

PLUG-IN

MICROPHONE ATTENUATORS,
EQUALIZERS AND ADAPTERS

A series of in-line microphone attenuators, equalizers and
adapters that plug in to give instant modifications of response
and performance in microphones and sound systems-with-
out time-consuming permanent rewiring 0r soldering. Only 114
mm (41/2 inches) long x 19 mm (% inches) dia., with color-
coded nameplates for quick identification. Three-pin FEMALE
input and MALE output professional audio connectors.*

AlSA Microphone Attenuator:

Prevents input overload in applications where very strong signals
are applied to a microphone input. inserts a 15 dB loss.

AISPR Phase Reverser:

Reverses the phase of a balanced line without modification of
equipment.

AISHP High Pass Filter:

Provides a. low frequency cut-off to reduce unwanted low fre-
quency nOIses.

AISLP Low Pass Filter:
Provides a high frequency cut-off to reduce objectionable high
frequency noises.

AlSPA Presence Adapter:

Adds presence to vocals or instruments in recording, broad-
casting, and PA. applications.

AlSRS Response Shaper:
Provides sibilance filtering in recording, broadcasting, and PA.
appficafions.

AISLA Line Input Adapter:

Converts balanced low impedance microphone input to bridg-
ing line level input.

A] SBT Bridging Transformer:

Matches balanced or unbalanced devices of different imped-
ances. (33 kilohm primary, and 600 or 7,500 ohm secondary.)

A15TG Tone Generator:

Produces a continuous 700 Hz signal capable of driving low
impedance balanced lines, and is extremely useful in setting up
and trouble-shooting audio equipment. Plugs into microphone
input to enable engineer to check levels, connections, mixer
inputs, cables, and speakers. Permits one man to do the work
of two. Powered by a miniature mercury battery.

*Designed to mate with Cannon XL Series, Switchcraft A3 (Q.G.)
series, or equivalent connector.

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A95 SERIES: LOW-IMPEDANCE TO HIGH-
IMPEDANCE LINE MATCHING TRANSFORMERS
(PLUG-IN TYPES)

High quality transformers that make it possible to connect a low-
impedance microphone to a high-impedance amplifier input or
vice versa. Terminated with a variety of connectors that allow
instant connection of these transformers to most microphone
plugs and amplifier jacks. Solves problems of excessive high-
frequency loss and objectionable hum when long lengths of
cable are used.

Model (trhgtmhpggoigggiggglnaegag*) High-Impedance Connector
A95A MALE MC1M**
.9 A95F FEMALE MClM**
' A95P MALE 1A: inch phone plug
A95FP FEMALE 1/4 inch phone plug
A950 MALE 1/4 inch phone jack 3
A95FD FEMALE 1/4 inch phone jack
A95U MALE 1/4 inch phone plug and 1A1 inch
phonejack
A95UF FEMALE 1%; inch phone plug and 1%: inch
phonejack
LOW-IMPEDANCE TO MEDIUM-IMPEDANCE

2 LINE MATCHING TRANSFORMER. A97A
5 LINE MATCHING TRANSFORMER:

High quality transformer designed to properly match low-
impedance (ISO-ohm to 600~ohm) microphone outputs to :
medium-impedance (l-kilohm to 10-kil0hm) inputs, such as
those frequently used in cassette recorders. Low-impedance
connector-three-pin MALE professional audio connector*. J

, Medium-impedance connector-Amphenol MClM type con-
, nect0r**.

*Designed to mate with Cannon XL Series, Switchcraft A3 (0.6.)
series, or equivalent connector.

** Mating connector supplied with unit.