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| Beta 27
Instrument Microphone |
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Product Code: Beta 27 Instrument Microphone
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The Beta 27 side-address
condenser microphone is precision engineered for professional sound
reinforcement and project studio recording applications. Its flat
frequency response and low self-noise provide unerring performance
in demanding environments. A tight supercardioid pattern ensures
high gain-before-feedback and maximum isolation from other sound
sources.
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| Features |
- Supercardioid polar pattern
specifically targets the sound source consistently with greatly
minimized bleed from off-axis sound sources
- Tailored for superior transient
response from a low-mass, 1” externally-biased, ultra-thin 24
Karat gold-layered Mylar® diaphragm
- Flat, neutral frequency response
for natural reproduction on stage or in the studio
- 3-position switchable
low-frequency filter helps reduce unwanted background noise or
counteract proximity effect for consistent, extended
lowend
- -15 dB switchable attenuator
handles extremely high SPLs with ease
- Premium electronic components
and gold-plated internal and external connectors
- Internal pop filter with three
separate mesh layers reduces wind and breath noise.
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| Specifications |
- Type: Condenser (externally
biased)
- Frequency Response: 20 to 20,000
Hz
- Polar Pattern:
Supercardioid
- Impedance: 160 Ohms
- Sensitivity (at 1 kHz, open circuit
voltage): -37 dBV/Pa
1 Pascal=94 dB SPL
- Maximum SPL (1 kHz at 1% THD):
1000 Ohm load: 134 dB (148 dB, Pad on)
2500 Ohm load: 140 dB (154 dB, Pad on)
- Signal-to-Noise Ratio (referenced
at 94 dB SPL at 1 kHz): 85.5 dB
S/N ratio is difference between 94 dB SPL and equivalent SPL of
self noise, A-weighted
- Dynamic Range (at 1 kHz):
1000 Ohm load: 125.5 dB
2500 Ohm load: 131.5 dB
- Common Mode Rejection (20 Hz to 20
kHz): > 50 dB
- Clipping Level (20Hz-20 kHz at 1%
THD):
1000 Ohm load: 2.0 dBV
2500 Ohm load: 8.5 dBV
THD of microphone preamplifier when applied input signal is
equivalent to cartridge output at specified SPL
- Self Noise (typical, equivalent
SPL, A-weighted): 8.5 dB
- Polarity: Positive pressure on
diaphragm produces positive voltage on pin 2 with respect to pin
3
- Weight: Net: 428 g (15.1
oz.)
- Switch: Attenuator: -15 dB
Low Frequency Response: flat; -6 dB/octave below 115 Hz; -18
dB/octave below 80 Hz
- Connector: Three-pin professional
audio (XLR), male
- Power Requirements: 48 Vdc phantom,
5.6 mA
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