Shure 315, 315S User Guide
222 HARTREY AVE., EVANSTON, IL. 60204 U.S.A.
DATA
AREA CODE 312/328-9000 . CABLE: SHUREMICRO
BIDIRECTIONAL RIBBON MICROPHONES
General:
rugged ribbon microphones combining wide range response and a bidirectional pickup pattern. The bidirectional pattern reduces noise and reverberation providing the same control as an equivalent cardioid
microphone. The Models 315 and
high quality public address, theater stage sound systems, and recording applications.
tional polar pattern, they may be used for either single
performer, a dialogue or group, solo or orchestra, and
other individual or chorus applications.
The Models 315 Gold and 315s Gold feature a gold
finish. Specifications in other respects are the same
as those for the standard models.
The microphones feature:
The Models 315 and
connecting into microphone inputs rated at 25 to 50
ohms, 150 to 250 ohms, or into high impedance micro-
phone inputs.
The low impedances are recommended where long
cable lengths are required or under conditions of
severe hum disturbance. The permissible cable length
is practically unlimited, since neither response nor
level is appreciably affected. For use with high impedance amplifiers, Shure Model
Transformer is available for coupling the low imped-
ance line to the amplifier input.
Impedance Selection
Selection of the various impedances is accomplished
by removing a plate and changing the position of the
switch at the rear of the microphone. The switch positions are marked
"M" for medium impedance (150-250 ohms), and
for high impedance (35,000 ohms).
Guarantee:
use to be free from electrical and mechanical defects
for a period of one year from the date of purchase.
Please retain proof of purchase date. This guarantee
includes all parts and labor.
The Models 315 and 315s are compact and
315s are ideal for
Due to the bidirec-
Wide range front and rear response.
Bidirectional
frequency range.
Convenient impedance selection. returned to vou ~re~aid.
A strong detachable cable especially selected
for good shielding from "hum" pickup.
A self-adjusting swivel permits aiming micro-
phone at source of sound.
Rugged mechanical design with special ribbon
protection.
This Shure product is guaranteed in normal
polar pattern, effective over wide
315s are multi-impedance for
A95A Line Matching
"L" for low impedance (25-50 ohms),
"H"
Shipping Instructions:
return it prepaid to the factory. If outside the United
States,
Shure Service Center for repair. The unit will be
The microphone shall be a Shure Model 315 (315s)
or equivalent, a ribbon microphone with a frequency
range of 50 to 12,000 Hz. This unit shall have a bidirectional polar characteristic. The cancellation at the
sides shall be 15 to 20 db. The microphone shall be
equipped with a three-position impedance change
switch for adjusting the microphone rating impedance
of 25-50 ohms, 150-250 ohms, or 35,000 ohms, The
Model
Model 315 shall have no switch.
The microphone output shall be:
L -25-50 ohm impedance
M-150-250 ohm impedance
H
*O
**0 db
The microphone rating Gm (sensitivity) at 1,000 Hz
shall be within
EIA Standard Rating SE-105 August 1949
The microphone shall be provided with a swivel and it
shall have a detachable cable connector capable of
connection to a two-conductor shielded cable. The
microphone will mount on a stand having
thread. The overall dimensions shall be 9-5/32"
(232.5 mm)
width and 1-3/32" (27.8 mm) in depth.
SHEET
return the unit to your dealer or Authorized
ARCHITECT'S SPECIFICATIONS
315s shall have a built-in "On-Off" switch. The
-High
"L"
"M" Position of switch -152.5 db
"H"
. . . . .
. . .
db = 1 milliwatt per 10 microbars
=
1 volt per microbar
Position of switch -155 db
Position of switch -155 db
kY4"
MODELS
315
315s GRADIENT
-
Carefully repack the unit and
. . . . . . . . . .
. . . .
. . . . . .
. . . . . . . . . . . . . .
23 db of the following levels.
in height 1-7/16" (36.6 mm)
. . .
.
.
.-62
.
.
. .
.-61
.-58.5 db**
AND
db*
db*
Ye"-27
2%"
in
Copyright 1967, Shure Brothers
27A175 (LB)
Inc.
(Over)
U.S.
Patent D171.055
Printed
in
U.S.A.
OPTIONAL ACCESSORIES Switch:
Model 315 None
Line Matching Transformer
Vibration-Isolation Stand
Desk Stand
................................
Quick-Disconnect Isolation Unit
REPLACEMENT COMPONENTS
Cable and Plug Assembly Model C55 Packaged Weight:
Important: Shure Microphone Cables are selected
..................
....................
.........
Model A47 locking type switch.
...............
A95A Model 315s Built-in "ON-OFF" switch to control
S39A microphone circuit. The switch is an integral part
S36A of the receptacle assembly and is a slide-to-talk
Net Weight (Less Cable):
1 pound (454 grams)
3%
pounds
(1,474
after exhaustive tests to insure superior performance
in microphones because of low capacities, superior
shielding properties and unusually long life under
severe use.
Cables with plastic insulation should not be subjected to excessive soldering-iron heat. Carefully clean
and tin the conductors and the connections to which
the conductors are to be soldered. The soldering operation can then be done with a minimum of heat, thereby
avoiding any possibility of damage to the cable.
grams)
SPECIFICATIONS
Type:
Ribbon
Frequency Response:
50 to 12,000
Polar Pattern:
Bidirectional, equally sensitive at front and back.
Response at sides down 15 to 20 db from front and
rear responses. See Figure C.
Microphone Rating Impedance:
Equipped with multi-impedance switch, furnishing a
choice of 3 impedances: "L" for connections into
microphone inputs rated at 25 to 50 ohms; "M"
for connections into microphone inputs rated at 150
to 250 ohms; and
impedance microphone inputs.
Output Level:
Hz.
1,000
Models
Open Circuit Voltage Level
Loaded with 50 ohms..
Power Level into 50 ohms.
E.I.A. Microphone Rating
Gm (Sensitivity)
Models 315 and 315s "M" Position
Open Circuit Voltage Level
Loaded with 250 ohms.
Power Level into 250 ohms.- 61 db*"
E.I.A. Microphone Rating
Gm (Sensitivity)
Models 315 and 315s
Open Circuit Voltage Level
Loaded with 100,000 ohms.- 61 db*
E.I.A. Microphone
Gm (Sensitivity)
*O db = 1 Volt per Microbar
**O db = 1 Milliwatt with 10 Microbars
*
*
*E.I.A. Standard SE-105, August 1949.
Cable:
15 foot (4.6 m) two-conductor shielded with
no1 MC3M type microphone plug on the microphone
end.
Case:
Chrome-plated die cast.
Dimensions:
See Figure
Hz.
response
315
and
D.
See Figure B.
"H"
for connections into high
315s
"L"
Position
...
.......
.. .-
.......
"H"
Position
Rating
.......
.-
89 db* (0.044 mv)
.-
94 db*
.-
62 db**
.-I55 db*
.-
81
*
*
db* (0.100 mv)
86 db*
.-I52 db***
.-
59 db*
.-I55 db***
Amphe-
%
z
W
v,
$
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Id
r
a
+IO
0
-,,
*O
50
INTERNAL
loo
FREQUENCY
DIRECTIONAL
I
OVERALL
FIGURE
CONNECTIONS
FIGURE
1,000
RESPONSE
FIGURE
PATTERNS
FIGURE
DIMENSIONS
A
C
D
CABLE - PLUG
ASSEMBLY
l0,OOO 20,000
IN
HERTZ
B
a
70
mm,
1421mml
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