Shure 315, 315S User Guide

OPTIONAL ACCESSORIES

Line Matching Transformer . . . . . . . . . . . . . . . . . . A95A

Vibration-Isolation Stand . . . . . . . . . . . . . . . . . . . . S39A

Desk Stand ................................ S36A

Quick-Disconnect Isolation Unit . . . . . . . . . Model A47

REPLACEMENT COMPONENTS

Cable and Plug Assembly . . . . . . . . . . . . . . . Model C55

Important: Shure Microphone Cables are selected 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.

SPECIFICATIONS

Type: Ribbon

Frequency Response:

50 to 12,000 Hz. See Figure B.

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 "H" for connections into high impedance microphone inputs.

Output Level:
1,000 Hz. response
Models 315 and 315s "L" Position
Open Circuit Voltage Level .-		89 db* (0.044 mv)
Loaded with 50 ohms.. . . . .-		94 db*
Power Level into 50 ohms. .-		62 db**
E.I.A. Microphone Rating
Gm (Sensitivity)	. . . . . . ..-I55		db* * *
Models 315 and 315s "M" Position
Open Circuit Voltage Level .-		81 db* (0.100 mv)
Loaded with 250 ohms. . . .-		86 db*
Power Level into 250 ohms.-		61 db*"
E.I.A. Microphone	Rating
Gm (Sensitivity)	....... .-I52		db***
Models 315 and 315s "H" Position
Open Circuit Voltage Level .-		59 db*
Loaded with 100,000 ohms.-		61 db*
E.I.A. Microphone	Rating
Gm (Sensitivity)	. . . . . . ..-I55		db***

*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 Ampheno1 MC3M type microphone plug on the microphone end.

Case:

Chrome-plated die cast.

Dimensions:

See Figure D.

Switch:

Model 315 None

Model 315s Built-in "ON-OFF" switch to control microphone circuit. The switch is an integral part of the receptacle assembly and is a slide-to-talk locking type switch.

Net Weight (Less Cable):

1 pound (454 grams)

Packaged Weight:

3% pounds (1,474 grams)

	CABLE - PLUG
INTERNAL CONNECTIONS	ASSEMBLY

FIGURE A

% +IO

z

W	0
v,

$

," -,,

Idr
a
*O	50	loo	1,000	l0,OOO 20,000

FREQUENCY RESPONSE IN HERTZ

FIGURE B

DIRECTIONAL PATTERNS

FIGURE C

I

a

7 0 mm,

1421mml

OVERALL DIMENSIONS

FIGURE D