Model Beta 87A Condenser Microhpone Specification Sheet by ChristMoore

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									                                                                               Model Beta 87A Condenser Microhpone
                                                                                                 Specification Sheet

BETA 87A
SUPERCARDIOID CONDENSER MICROPHONE




OVERVIEW
  The Shure Model BETA 87A is a premium quality supercar-                          that compensates for proximity effect and prevents the “boomy”
dioid hand-held electret condenser vocal microphone with ex-                       sound often associated with close pick-up. The characteristic
ceptionally smooth frequency response and high sound pres-                         Shure presence rise brightens the upper midrange. The tight su-
sure level (SPL) capability. Used for professional sound rein-                     percardioid pattern, with null points at approximately 125°, pro-
forcement, broadcasting, and studio recording applications, the                    vides maximum isolation from other vocalists or instruments
BETA 87A combines superb performance with the ruggedness                           while offering minimal off-axis coloration. The BETA 87A oper-
needed for touring and field production.                                           ates on phantom power.
     The BETA 87A features a controlled low-frequency roll-off

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

SPECIFICATIONS
Cartridge Type                                                                     Polar Pattern
  Condenser (electret bias)                                                          Supercardioid
                                                                                                     180o                                     180o
Frequency Response                                                                            150o                150o                 150o               150o
  50 to 20,000 Hz
                                                                                       120o                              120o   120o                              120o
        ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
          ÑÑÑ ÑÑÑÑ
          Ñ
          Ñ     Ñ
        Ñ ÑÑÑÑÑÑÑÑ ÑÑ Ñ10 mm (3/8 in.)
        ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
        ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
          Ñ ÑÑÑÑÑÑÑ ÑÑ
        Ñ ÑÑÑÑÑÑÑÑ ÑÑ Ñ
       +10      Ñ
          ÑÑÑ ÑÑÑÑ
          ÑÑÑ ÑÑÑÑ
        ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ                                                              90o                                  90o 90o                                  90o
          Ñ
          Ñ
        Ñ ÑÑÑ ÑÑÑÑ
          Ñ     Ñ                                                                                    –20 dB                                   –20 dB
  dB




         0
        Ñ ÑÑÑÑÑÑÑÑ ÑÑ Ñ
          ÑÑÑÑÑÑÑÑ ÑÑ Ñ
          ÑÑÑ ÑÑÑÑ
        ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
          Ñ     Ñ                                                                       60o
                                                                                                     –15 dB
                                                                                                     –10 dB
                                                                                                                         60o     60o
                                                                                                                                              –15 dB
                                                                                                                                              –10 dB
                                                                                                                                                                  60o

        ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
        Ñ ÑÑÑÑÑÑÑÑ ÑÑ Ñ
          Ñ ÑÑ ÑÑÑÑ
        ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
       –10Ñ
          Ñ     Ñ
        ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
                          0.6 m (2 ft.)
                                                                                              30o
                                                                                                     –5 dB
                                                                                                                  30o                  30o
                                                                                                                                              –5 dB
                                                                                                                                                          30o
          ÑÑÑ ÑÑÑÑ
          Ñ
        Ñ ÑÑÑÑÑÑÑÑ ÑÑ Ñ
          Ñ
          Ñ
          Ñ
        ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
                Ñ                                                                                     0

                                                                                                               250 Hz
                                                                                                                                               0


        Ñ Ñ
          Ñ  20 Ñ 50    100
                                 2   3 4 5 6 789

                                           Hz
                                               1000
                                                      2   3 4 5 6 7 89
                                                                     10000 20000                               500 Hz
                                                                                                              1000 Hz
                                                                                                                                                        2500 Hz
                                                                                                                                                        6300 Hz
                                                                                                                                                       10000 Hz


                  TYPICAL FREQUENCY RESPONSE                                                              TYPICAL POLAR PATTERN
    MODEL BETA 87A CONDENSER MICROPHONE                                                                                                                  Specification Sheet
Output Impedance                                                                                   Signal-to-Noise Ratio
  Rated at 150 ohms (100 ohms actual ±20%)                                                           70.5 dB at 94 dB SPL (IEC 651)*
  Recommended minimum load impedance: 800 ohms                                                     Polarity
Sensitivity (at 1,000 Hz)                                                                            Positive pressure on diaphragm produces positive voltage on pin
  Open Circuit Voltage . . . . . . . . . . . . . . . . . –52.5 dBV/Pa (2 mV)                         2 relative to pin 3
                                                               (1 Pa = 94 dB SPL)                  Power
Clipping Level (at 1,000 Hz)                                                                         Phantom Supply Requirement . . . . . . . . . 11 to 52 Vdc, positive
  1000 ohm Load . . . . . . . . . . . . . . . . . . . . . . . . . . . –6 dBV (0.5 V)                  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . at both pins 2 and 3
Maximum SPL (at 1,000 Hz)                                                                            Current Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 to 1.2 mA
  140.5 dB (0.25% THD, 1000 ohm load)                                                              Connector
Self-Noise (equivalent sound pressure level; measured with true                                      Three–pin (XLR) professional audio
rms voltmeter)                                                                                     Case
  23.5 dB typical, A-weighted                                                                        Aluminum construction with blue metallic finish, and hardened
  25.5 dB typical, weighted per DIN 45 405                                                           steel grille with nickel satin chrome plating
Dynamic Range                                                                                      Net Weight
  117 dB (maximum SPL to A-weighted noise level)                                                     207 grams (7.6 oz)
Dimensions
                                                                                 192 mm
                                                                                (7–9/16 in.)




              21 mm                                                                                                                                    51 mm
             (53/64 in.)                                                                                                                               (2 in.)



                                       DIMENSIONS

FURNISHED ACCESSORIES
Swivel Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A25D                Carrying/Storage Bag . . . . . . . . . . . . . . . . . . . . . . . . . 26A13
REPLACEMENT PARTS
Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RK312         Replacement Amplifier Assembly . . . . . . . . . . . . 90KF2600
Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R193
OPTIONAL ACCESSORIES
Phantom Power Supply . . . . . . . . . . . . . . . . . . . . . . . . PS1A                          Windscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A85WS
Isolation Mount . . . . . . . . . . . . . . . . . . . . . . . . A53M, A53HM                        Cable (7.6 m—25 ft) . . . . . . . . . . . . . . . . . . . . . . . . . . . C25F




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