Product Specications

Beta 87A Supercardioid Condenser Vocal Microphone

Overview

The Shure Beta 87A is a precision-engineered supercardioid condenser vocal microphone with an exceptionally smooth frequency response. Built to withstand extreme sound pressure levels, the Beta 87A is ideal for professional sound reinforcement and studio recording applications - and constructed to withstand the rigors of touring.

Features

Premier live performance microphone with Shure quality, ruggedness, and reliability Uniform supercardioid pick-up pattern for maximum gain before feedback and superior rejection of off-axis sound Smooth, wide frequency response with gradual presence rise and controlled proximity effect tailored for vocals Advanced cartridge shock mount system absorbs mechanical shock and minimizes handling noise Dent-resistant steel mesh grille and enamel coated metal alloy construction resist wear and abuse Effective built-in pop filter reduces undesirable wind and breath noise Very low susceptibility to RF and electromagnetic hum

BETA 87A

Available Models

Specifications

Cartridge Type Frequency Response Polar Pattern Output Impedance Sensitivity (at 1kHz, open circuit voltage) Maximum SPL (1 kHz at 1% THD, 1k ohms load) Signal-to-Noise Ratio (referenced at 94 dB SPL at 1 kHz) Dynamic Range (at 1 kHz, 1 k ohms load) Clipping Level (1 kHz at 0.25% THD, 1k ohms load) Self Noise (typical, equivalent SPL, A-weighted) Polarity Weight Connector Power Requirements Electret Condenser 50 to 20,000 Hz Supercardioid 150 ohms 52.5 dBV/Pa (2 mV) 1 Pascal=94 dB SPL 140.5 dB 70.5 dB S/N ratio is difference between 94 dB SPL and equivalent SPL of self noise, A-weighted 117 dB 6 dBV (0.5 V) 23.5 dB typical Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3 Net: 0.207 kg (0.475 lbs) Three-pin professional audio (XLR), male 11 to 52 Vdc phantom (1.2 mA)

Furnished Accessories

A25D Swivel Adapter 95A2314 Carrying/Storage Bag

Polar Pattern

Frequency Response

+20 +10

250 Hz 500 Hz 1000 Hz 2500 Hz 6300 Hz 10000 Hz

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10000 20000

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2011 Shure Incorporated

Model Beta 87A Condenser Microhpone Specification Sheet
BETA 87A SUPERCARDIOID CONDENSER MICROPHONE

OVERVIEW

The Shure Model BETA 87A is a premium quality supercardioid hand-held electret condenser vocal microphone with exceptionally smooth frequency response and high sound pressure level (SPL) capability. Used for professional sound reinforcement, broadcasting, and studio recording applications, the BETA 87A combines superb performance with the ruggedness needed for touring and field production. The BETA 87A features a controlled low-frequency roll-off that compensates for proximity effect and prevents the boomy sound often associated with close pick-up. The characteristic Shure presence rise brightens the upper midrange. The tight supercardioid pattern, with null points at approximately 125, provides maximum isolation from other vocalists or instruments while offering minimal off-axis coloration. The BETA 87A operates on phantom power.

FEATURES

S Smooth frequency response with gradual presence rise S Highly consistent supercardioid polar pattern provides superior gain-before-feedback S Electronic low-frequency roll-off compensates for proximity effect S Wide dynamic range (117 dB) and low distortion characteristics S Very low susceptibility to RFI and electromagnetic hum S Advanced cartridge shock-mount system absorbs mechanical shocks and reduces handling noise S Built-in pop filter reduces undesirable wind and breath sounds S Reliability for years of trouble-free performance

SPECIFICATIONS

Cartridge Type Condenser (electret bias) Frequency Response 50 to 20,000 Hz

+20 +10

120o 10 mm (3/8 in.) 90o
Polar Pattern Supercardioid
180o 150o 150o 120o 120o 150o 180o 150o 120o

90o 90o

60o 0.6 m (2 ft.) 30o

15 dB 10 dB 5 dB

60o 30o 250 Hz 500 Hz 1000 Hz

60o 30o

60o 30o 2500 Hz 6300 Hz 10000 Hz

50 100

10000 20000
TYPICAL FREQUENCY RESPONSE

TYPICAL POLAR PATTERN

MODEL BETA 87A CONDENSER MICROPHONE
Output Impedance Rated at 150 ohms (100 ohms actual 20%) Recommended minimum load impedance: 800 ohms Sensitivity (at 1,000 Hz) Open Circuit Voltage. 52.5 dBV/Pa (2 mV) (1 Pa = 94 dB SPL) Clipping Level (at 1,000 Hz) 1000 ohm Load. 6 dBV (0.5 V) Maximum SPL (at 1,000 Hz) 140.5 dB (0.25% THD, 1000 ohm load) Self-Noise (equivalent sound pressure level; measured with true rms voltmeter) 23.5 dB typical, A-weighted 25.5 dB typical, weighted per DIN Dynamic Range 117 dB (maximum SPL to A-weighted noise level) Dimensions

192 mm (79/16 in.)

Specification Sheet
Signal-to-Noise Ratio 70.5 dB at 94 dB SPL (IEC 651)* Polarity Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 Power Phantom Supply Requirement. 11 to 52 Vdc, positive. at both pins 2 and 3 Current Drain. 1.0 to 1.2 mA Connector Threepin (XLR) professional audio Case Aluminum construction with blue metallic finish, and hardened steel grille with nickel satin chrome plating Net Weight 207 grams (7.6 oz)

21 mm (53/64 in.)

51 mm (2 in.)

DIMENSIONS

FURNISHED ACCESSORIES
Swivel Adapter. A25D Carrying/Storage Bag. 26A13 Replacement Amplifier Assembly. 90KF2600

REPLACEMENT PARTS

Grille. RK312 Cartridge. R193

OPTIONAL ACCESSORIES

Phantom Power Supply. PS1A Isolation Mount. A53M, A53HM Windscreen. A85WS Cable (7.6 m25 ft). C25F