BP4029 Audio-Technica | Audio-Technica

Stereo Shotgun Microphone

BP4029

Designed for broadcasters, videographers and sound recordists.

Compact, lightweight design is perfect for camera-mount use.

Independent line-cardioid and figure-of-eight condenser elements.

Switchable low-frequency roll-off.

Switch selection of non-matrixed M-S mode and two internally-matrixed left/right stereo modes.

The BP4029 requires 11V to 52V DC phantom power on both XLR3M connectors. Wiring must be balanced throughout, and all mic cables in the system must be wired consistently: Pin 1-to-Pin 1, etc. If connecting to unbalanced inputs, good-quality balanced line transformers must be used.

The microphone is RoHS compliant–free from all substances specified in the EU directive on hazardous substances.

MID-SIDE OPERATION: In M-S mode, the BP4029 provides independent Mid and Side signals. This allows the width of the stereo image to be adjusted in post production or in the field with a matrix mixer.

MATRIXED STEREO: The BP4029 offers two internally-matrixed modes which provide traditional “left-right” stereo without the need for external mixers. To accommodate varying acoustic environments, the user may select between a “wide” pattern (LR-W) with increased ambient pickup, and a “narrow” pattern (LR-N) which offers more rejection and less ambience. Output phase is “Pin 2 hot.”

For correct left-right stereo orientation, position the microphone so the word “UP” is on top, with the switches on the bottom. In all modes, locating the BP4029 nearer the sound source enhances the apparent width of the stereo image, while decreasing room ambience. Moving away from the sound source will result in a narrower stereo image and more “room sound.”

BP4029 Specifications

Element

Fixed-charge back plate permanently polarized condenser

Polar Pattern

Line-cardioid and figure-of-eight

Frequency Response

40 ~ 20,000 Hz

Low Frequency Roll-Off

80 Hz, 12 dB/octave

Open Circuit Sensitivity

Mid: -30 dB (31.6 mV) re 1V at 1 Pa;
Side: -34 dB (19.9 mV) re 1V at 1 Pa;
LR Stereo: -36 dB (15.8 mV) re 1V at 1 Pa

Impedance

200 Ω

Maximum Input Sound Level

Mid: 123 dB SPL, 1 kHz at 1% T.H.D.;
Side: 127 dB SPL, 1 kHz at 1% T.H.D.;
LR Stereo: 126 dB SPL, 1 kHz at 1% T.H.D.

Dynamic Range (Typical)

Mid: 101 dB, 1 kHz at Max SPL;
Side: 101 dB, 1 kHz at Max SPL;
LR Stereo: 102 dB, 1 kHz at Max SPL

Signal-To-Noise Ratio

Mid: 72 dB, 1 kHz at 1 Pa;
Side: 68 dB, 1 kHz at 1 Pa;
LR Stereo: 70 dB, 1 kHz at 1 Pa

Phantom Power

11~52V DC, 4 mA typical at 48V

Switch

M-S, LR Stereo-Wide (LR-W), LR Stereo-Narrow (LR-N); Flat, roll-off

Weight

103 g

Dimensions

236.0 mm long, 21.0 mm diameter

Cable

Dual 0.61 m shielded, two-conductor, terminated in two XLR3M-type connector

Accessories Furnished

AT8405a stand clamp for ⅝”-27 threaded stands;
AT8134 foam windscreen;
⅝”-27 to ⅜”-16 threaded adapter;
protective carrying case