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Beta 91 Kick Drum Microphone |
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Product Code:
Beta 91
Kick Drum Microphone
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The Shure Beta 91™ is
specifically designed for kick drums and other bass
instruments.
The
Beta 91 combines superior "attack" and "punch" for studio quality
sound, even at the extremely high sound pressure levels encountered
inside a kick drum. Its boundary effect design produces a strong,
solid low-end response that has been specifically tailored for
heavy bass applications.
The
microphone's cardioid pattern provides outstanding
gain-before-feedback and excellent rejection of unwanted sound,
making the Beta 91 ideal for live concert applications. The low
profile design of the Beta 91 eliminates the need for external
mounting hardware - just throw it in your kick drum and
play.
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| Features |
- Frequency response shaped
specifically for kick drums and other instruments
- Wide dynamic range for use in
high SPL environments
- Low-profile design requires no
external mounting hardware
- Detachable cable for easy
storage
- Legendary Shure quality,
ruggedness, and reliability
Interchangeable replacement cartridges:
•RPM108 : Cardioid
•RPM110 : Supercardioid
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| Specifications |
- Type : Cardioid condenser
(electret bias)
- Polar Pattern : Half-cardioid
(cardioid in hemisphere above mounting surface), uniform with
frequency, symmetrical around axis.
- Output Level (at 1,000 Hz) :
Open Circuit Voltage: -59 dBV/Pa* (1.1 mV) typical
*1 Pa = 94 dB SPL
- Maximum SPL
(20 Hz to 20 kHz, less than 1% THD)
2.5 kilohm load: 160 dB
1 kilohm load: 156 dB
- Preamplifier Output Clipping
Level
(20 Hz to 20 kHz, less than 1% THD*)
2.5 kilohm load: 6 dBV (2.0 V)
1 kilohm load: 2 dBV (1.26 V)
*THD of the microphone preamplifier when applied input signal is
equivalent to the cartridge output at specified
SPL.
- Dynamic Range
(20 Hz to 20 kHz, less than 1% THD, 2.5 kilohm load)
125 dB (max SPL minus A-weighted noise)
- Output Noise : 35 dB SPL
(typical), A-weighted
- Signal-to-Noise Ratio : 59 dB re
94 dB SPL
- Output Impedance : 150 ohms
(actual)
- Polarity : Positive pressure on
diaphragm produces positive voltage on pin 2 with respect to pin
3
- Power : Phantom Power: 48 Vdc
+/- 4 Vdc (IEC-268-15/DIN 45 596), positive pins 2 and
3
- Electromagnetic Hum Pickup :
-7.5 dB equivalent SPL in 1 mOe field (60 Hz)
- Cable : 4.6 m (15 ft)
heavy-duty, two-conductor shielded, TA4F to TA3F
connectors
- Case : Matte-black , painted,
die-cast, zinc-alloy case with matte-black steel
grille
- Dimensions : 95 mm x 129 mm x 19
mm (3.75 in. x 5.08 in. x 0.75 in.)
- Net Weight ; 382 grams (13.5 oz)
less cable
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