Audio-Technica BP28 Large-Diaphragm Line Gradient Microphone, 14 Inch
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Audio-Technica BP28 Large-Diaphragm Line Gradient Microphone, 14 Inch
The BP28 combines a large-diaphragm condenser element with a 28 mm diameter shotgun body for exceptional low-noise performance. With a highly directional pickup pattern and a patented acoustic port design that maintains directionality across the entire frequency range, this 14ā shotgun microphone is specially tailored to meet the needs of broadcast, film, television, outdoors recording and theater applications. Particularly suitable for long-distance miking for film or theater, the BP28 has an exceptionally low noise floor (8 dB) and transformer-coupled outputs that produce a smooth sonic character. The microphone also provides extremely high sensitivity (-28 dBV), wide dynamic range (135 dB), and high-SPL capability (143 dB), and is equipped with a switchable 80 Hz high-pass filter and 10 dB pad.
Key Features
- Designed for use in broadcasting, film/TV production, and theater sound reinforcement applications
- Overall length of 14ā with a highly directional pickup pattern
- The custom 28 mm diameter shotgun body houses a large-diaphragm condenser element for exceptional low-noise performance
- Transformer-coupled output provides smooth sonic character
- Extremely high sensitivity (-28 dBV), wide dynamic range (135 dB), and high-SPL capability (143 dB)
- Flat frequency response for accurate sound reproduction
- Rugged housing made of lightweight, structural-grade aluminum alloy
- Switchable 80 Hz high-pass filter and 10 dB pad
- Patented acoustic port design maintains directionality across the entire frequency range
Technical Specifications
Microphones
Element
Fixed-charge back plate, permanently polarized condenser
Polar Pattern
Line + gradient
Frequency Response
20-19,000 Hz
Low Frequency Roll Off
80 Hz, 18 dB/octave
Open CircuIt'sensitivity
-28 dB (39.8 mV) (0 dB=1 V/Pa, 1 kHz)
Impedance
250 ohms
Maximum Input Sound Level
143 dB SPL (1 kHz at 1% THD), 153 dB SPL (when pad is on)
Noise
8 dB SPL (A-weighted)
Dynamic Range
135 dB (1 kHz at Max SPL)
Signal-to-Noise Ratio
86 dB (1 kHz at 1 Pa, A-weighted)
Phantom Power Requirements
11 - 52 V DC, 3.4 mA
Switches
Low cut: on/off, Pad: on/off
Weight
223 g (7.9 oz)
Dimensions
354.9 mm (14.0ā) long, 28.0 mm (1.1ā) maximum body diameter
Output Connector
Integral 3-pin XLR-M type
Accessories Included
AT8170 windscreen, AT8470 stand clamp for 5/8ā-27 threaded stands, 5/8ā-27 to 3/8ā-16 threaded adapter, carrying case
Audio-Technica Case Style
SG6
