Operation, Specifications, Furnished Accessories

OPERATION

Power

The SM86 requires phantom power. This may be supplied to the microphone from an external power supply (such as the Shure model PS1A) or directly from preamplifiers, mixers, or consoles with built-in phantom power. Suitable sources should provide 11 to 52 Vdc phantom voltage.

Impedance

A load impedance of at least 600 Ohms is recommended. The load may be as low as 150 Ohms, but a reduction in output level and output clipping level will result.

SPECIFICATIONS

Transducer Type

Condenser (electret bias)

Frequency Response

50 to 18,000 Hz (see Figure 2)

Dynamic Range (1000 Ω)

124 dB (maximum SPL to A-weighted noise level)

Signal-to-Noise Ratio

71 dB at 94 dB SPL (IEC 651)*

*S/N ratio is difference between 94 dB SPL and equivalent SPL of self– noise A-weighted.

Polarity

Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of the output connector. See Figure 4.

CAPACITOR (ELECTRET CONDENSER) CARTRIDGE

BLACK	FET IM-		DISCRETE
		LF RESPONSE		RFI FILTER	2	1
	PEDANCE CON-		CLASS A

		FILTER				3
GREEN	VERTER		AMPLIFIER

REVERSE

VOLTAGE

PROTECTOR

SM86 BLOCK DIAGRAM

								FIGURE 4
								Power
	+10							Phantom Supply Requirement . . . . . . . . 11 to 52 Vdc, positive
								at both pins 2 and 3
dB	0							Current Drain	5.2 mA
								Connector
	–10							Three–pin (XLR) professional audio
								Case
			29 3	4 5 6789	2	3	4 5 6789	Dark gray enamel-painted steel with matte-finished silver
	20	50	29 3	4 5 6789	2	3	4 5 6789	colored steel grille
	20	50	100	1000			10000 20000	Dimensions
				Hz				Dimensions
				Hz				See Figure 5
								See Figure 5

TYPICAL FREQUENCY RESPONSE

FIGURE 2

Polar Pattern

Cardioid (see Figure 3)

250 Hz	2500 Hz
500 Hz	6400 Hz
1000 Hz	10000 Hz

TYPICAL POLAR PATTERN

FIGURE 3

Output Impedance

150 Ohms at 1 kHz

Recommended minimum load impedance: 600 Ohms

	183 mm
	(7.2 in.)
24 mm	49 mm
(.95 in.)	(1.92 in.)

OVERALL DIMENSIONS

FIGURE 5

Net Weight

Net: 278 grams (9.8 oz)

Environmental Conditions

Operating: –18°to 60° C (0° to 135° F) (relative humidity <90%)

Storage: –29°to 74° C (–20°to 165° F) (relative humidity <80%)

CERTIFICATION

Eligible to bear CE Marking. Conforms to European EMC Directive 89/336/EEC. Meets applicable tests and performance criteria in European Standard EN55103 (1996) parts 1 and 2, for residential (E1) and light industrial (E2) environments.

FURNISHED ACCESSORIES

Break Resistant Microphone Clip . . . . . . . . . . . . . . . . A25D Microphone Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26A13 5/8” to 3/8” Thread Adapter . . . . . . . . . . . . . . . . . 31A1856

Sensitivity (at 1,000 Hz)

Open Circuit Voltage . . . . . . . . . . . . . . . . –50 dBV/Pa (3.15 mV) (1 Pa = 94 dB SPL)

Output Clipping Level

1000 Ohm Load at 1,000 Hz . . . . . . . . . . . . . . +3 dBV (1.41 V)

OPTIONAL ACCESSORIES

Phantom Power Supply . . . . . . . . . . . . . . . . . . . . . . . . PS1A Shock Stopper Isolation Mount . . . . . . . . . A55M, A55HM Popper Stopper Windscreen . . . . . . . . . . . . . . . . A85WS 7.6 m (25 ft.) Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . C25F

Maximum SPL (at 1,000 Hz)		REPLACEMENT PARTS
1000 Ω load (1% THD)	147 dB	Screen and Grille Assembly	RPM226
Self-Noise		Cartridge and Shock Mount	RPM112
23 dB typical, A-weighted		Replacement Amplifier Assembly	RPM410