Shure 515SDX warranty Unidirectional Dynamic Microphone, Basic Rules for Microphone USE

Model 515SDX User Guide

MODEL 515SDX

UNIDIRECTIONAL DYNAMIC MICROPHONE

The Shure Model 515SDX is a dual-impedance, cardioid (unidirectional) dynamic microphone that is suitable for speech pickup in schools, churches, and meeting rooms. Its unidirectional polar pattern greatly reduces feedback.

The 515SDX includes a locking ON/OFF switch and an in- ternal impedance selection socket mounted on the XLR con- nector for switching between high and low impedance. A slip-in swivel adapter is supplied for stand-mounted use.

Features

Rolled-off low-frequency response combined with a smooth high-frequency rise for clear and intelligible voice pickup

Symmetrical cardioid pickup pattern minimizes feed- back

Neodymium magnet for high signal-to-noise ratio

Shock-mounted cartridge that minimizes handling noise

Lockable ON/OFF switch

Dual impedance selectable by internal socket

Slip-in swivel adapter for stand-mounted use

Three-pin professional audio connector, the industry standard, for maximum interchangeability of cables

Tough, die-cast grille resists wear from constant use and handling

Field serviceable and backed by the Shure 2-year warranty

BASIC RULES FOR MICROPHONE USE

1.Aim a directional microphone toward the desired sound source (for instance, a talker or singer) and away from undesired sources (such as loudspeakers).

2.When extra bass response is desirable, work close to the microphone. During closeup use, the low frequency out- put will increase. This increase is called “proximity ef- fect.” Refer to the frequency response curve (Figure 1).

3.Locate the microphone as close as practical to the de- sired sound source to get the most gain before feedback.

4.Do not pick up the same sound source with more than one microphone. Keep the distance between multiple microphones at least three times the distance from each source to its intended microphone.

5.Use the fewest number of microphones possible.

6.Locate microphones as far as possible from acoustically reflective (hard or smooth) surfaces.

7.Add an external windscreen when additional pop protection is needed (outdoors in windy conditions or closeup vocal use, for example).

8.Avoid excessive handling of the microphone; doing so will minimize mechanical noise pickup.

9.Keep the grille unobstructed; doing so will preserve the microphone’s directional characteristics.

SPECIFICATIONS

Type

Dynamic

Frequency Response (Figure 1)

80 to 15,000 Hz

1 cm

(3/8 in.)

0.6 m (2 ft)

TYPICAL FREQUENCY RESPONSE

FIGURE 1

Polar Pattern (Figure 2)

Cardioid (unidirectional)

	180o			180o
150o	150o		150o	150o
120o		120o	120o		120o
90o		90o 90o			90o
	–20 dB			–20 dB
60o	–15 dB	60o	60o	–15 dB	60o
	–10 dB			–10 dB
	–5 dB			–5 dB
30o	30o		30o	30o
	0			0
	250 Hz			2500 Hz
	500 Hz			6400 Hz
	1000 Hz			10000 Hz

TYPICAL POLAR PATTERNS

FIGURE 2

 2005, Shure Incorporated

27C2838 (Rev. 4)

Printed in U.S.A.