Audio-Technica BP28 and BP28L Line + Gradient Condenser Microphones
- Large-diaphragm condenser element in a 28 mm diameter shotgun body
- Very low self-noise: 8 dB SPL (BP28) or 3 dB SPL (BP28L)
- Switchable 80 Hz high-pass filter and 10 dB pad
From $1,189.00 USD
Audio-Technica BP28 and BP28L Line + Gradient Condenser Microphones
The Audio-Technica BP28 and BP28L are line + gradient shotgun microphones that put a large-diaphragm condenser element in a 28 mm diameter body for low-noise performance. The BP28 is 14 inches long with a highly directional pickup, and the BP28L is 22.4 inches long with an extremely narrow one.
Audio-Technica built both for broadcast, film and television production, outdoor recording, and theater, and they suit long-distance miking on film sets and stages. A patented acoustic port design keeps the pickup directional across the whole frequency range, and transformer-coupled outputs give a smooth sonic character.
Both have a 135 dB dynamic range, a switchable 80 Hz high-pass filter, and a 10 dB pad, and both run on 11 to 52 V phantom power. The housings are lightweight, structural-grade aluminum alloy, and each model comes with its own windscreen, the AT8470 stand clamp, and a thread adapter.
Features
- Large-diaphragm condenser element in a 28 mm diameter shotgun body
- Highly directional (BP28) or extremely narrow (BP28L) line + gradient pickup
- Patented acoustic port design keeps directionality across the frequency range
- Transformer-coupled output for a smooth sonic character
- Self-noise of 8 dB SPL (BP28) or 3 dB SPL (BP28L)
- 135 dB dynamic range
- Switchable 80 Hz high-pass filter
- Switchable 10 dB pad
- Runs on 11 to 52 V phantom power
- Rugged housing of lightweight, structural-grade aluminum alloy
Available Options
| Model | Length | Pickup Pattern | Self-Noise | Max SPL | Windscreen |
|---|---|---|---|---|---|
| BP28 | 14 inches | Highly directional | 8 dB SPL | 143 dB SPL | AT8170 |
| BP28L | 22.4 inches | Extremely narrow, highly directional | 3 dB SPL | 138 dB SPL | AT8169 |
What's Included
- AT8170 windscreen (BP28) or AT8169 windscreen (BP28L)
- AT8470 stand clamp for 5/8″-27 threaded stands
- 5/8″-27 to 3/8″-16 threaded adapter
Specifications
| Element | Fixed-charge back plate, permanently polarized condenser |
|---|---|
| Polar Pattern | Line + gradient |
| Frequency Response | BP28: 20 – 19,000 Hz BP28L: 20 – 20,000 Hz |
| Low-Frequency Roll-Off | 80 Hz, 18 dB/octave |
| Open-Circuit Sensitivity | BP28: −28 dB (39.8 mV) re 1 V at 1 Pa, 1 kHz BP28L: −23 dB (70.8 mV) re 1 V at 1 Pa, 1 kHz |
| Impedance | 250 ohms |
| Maximum Input Sound Level | BP28: 143 dB SPL, 1 kHz at 1% T.H.D.; 153 dB SPL with pad on BP28L: 138 dB SPL, 1 kHz at 1% T.H.D.; 148 dB SPL with pad on |
| Noise | BP28: 8 dB SPL (A-weighted) BP28L: 3 dB SPL (A-weighted) |
| Dynamic Range | 135 dB, 1 kHz at Max SPL |
| Signal-to-Noise Ratio | BP28: 86 dB, 1 kHz at 1 Pa (A-weighted) BP28L: 91 dB, 1 kHz at 1 Pa (A-weighted) |
| Phantom Power | 11 – 52 V DC, 3.4 mA |
| Switches | Low cut: on/off; pad: on/off |
| Output Connector | Integral 3-pin XLRM-type |
| Dimensions | BP28: 354.9 mm (14.0 in) long, 28.0 mm (1.1 in) maximum body diameter BP28L: 567.9 mm (22.4 in) long, 28.0 mm (1.1 in) maximum body diameter |
| Weight | BP28: 223 g (7.9 oz) BP28L: 313 g (11 oz) |
