Shure SM87A Specification Sheet

Product Speciﬁcations

SM87A Includes Stand Adapter and Zippered Pouch

SM87A Supercardioid Condenser Microphone

Overview

The SM87A is a rugged, lightweight supercardioid condenser microphone with superior rejection for clear reproduction of warm and accurate lead vocals. Designed with a three-stage shock mount for low self-noise, and a tight polar pattern that excludes unwanted sound sources, the SM87A is an excellent choice for sound reinforcement in noisy or reverberant environments.

Features

• Highly directional supercardioid pickup pattern

• Controlled low-frequency roll-off

• Very low RF and magnetic hum susceptibility

• Minimally affected by varying load impedance

• Built-in wind and pop filter

• Transducer element shock mounted

• Rugged construction for outstanding reliability

• Field-usable over a wide range of temperature and humidity conditions

• Accepts a wide variety of phantom power sources, including DIN 45 596 voltages of 11 and 52 Vdc

Available Models

Specifications

Type Condenser

Frequency Response 50 to 20,000 Hz

Polar Pattern Supercardioid

Sensitivity (at 1,000 Hz) Open Circuit Voltage: –52.5 dBV/Pa (2.4 mV) (1 Pa = 94 dB SPL)

Impedance

Output Clipping Level 1000 Ohm Load at 1,000 Hz: –6 dBV (0.5 V)

Maximum SPL (at 1,000 Hz) 140.5 dB (0.25% THD, 1000 ohm load)

Self-Noise 24 dB typical, A-weighted

Dynamic Range (1000 ohms) 116.5 dB (maximum SPL to A-weighted noise level)

Signal-to-Noise Ratio

Polarity Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3

Power Requirements 11 to 52 vdc, 1.2 mA

Case Aluminum construction with steel grille and satin black finish

Connector Three-pin professional audio connector (male XLR type)

Net Weight 200 grams (7 oz)

Dimensions 192 mm (7-9/16 in.) L x 50 mm (2 in.) W at the widest point

Rated at 150 ohms (100 ohms actual ±20%)

Recommended minimum load impedance: 800 ohms

26 dB typical, weighted per DIN 45 405

70 dB at 94 dB SPL (IEC 651) S/N ratio is difference between 94 dB SPL and equivalent SPL of self– noise A-weighted

SM87A

Optional Accessories and Replacement Parts

A25D Microphone Clip RK128 Replacement Cartridge and Shock Mount A55M, A55HM Isolation Mount

A85WS Microphone Windscreen RK214G Replacement Screen and Grille

Polar pattern

100 Hz 500 Hz, 1000 Hz

3150 Hz 610000 Hz

Frequency response

+20

+10

–10

–20

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