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BidirectionalShotgunX/Y StereoMid-Side StereoAudio-Technica BP4029

Multi-Pattern Condenser Microphone

The BP4029 is a revised version of Audio-Technica’s AT835ST. Both are ~9-inch stereo shotgun microphones with a pair of electret condenser elements.

Like its predecessor, the BP4029 has two capsules — one line-gradient and one bidirectional. The output from these two is available independently via the XLR5M connector, to be matrixed externally into mid-side stereo.

The mic also has an onboard matrix that can produce two varieties of L/R stereo, “narrow” and “wide.” These three stereo modes are selected via a switch on the microphone.

A second switch enables a high-pass filter (-12dB/octave @ 80Hz).

The mic is RoHS compliant — free of hazardous substances.

It ships with a 2' breakout cable (XLR5F to 2xXLR3M), a stand clamp (p/n AT8405a), a foam windscreen (p/n AT8134), a thread adapter for 3/8''-16 mic stands, and a carrying case (p/n SG2).

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Frequency Response - X/Y StereoClick Graph to Compare!
BP4029 X/Y Stereo Frequency Response Chart
Pickup Patterns Pads & Filters
Bidirectional (19.9 mV/Pa; 40 - 20,000 Hz)
Shotgun (31.6 mV/Pa; 40 - 20,000 Hz)
X/Y Stereo (15.8 mV/Pa; 40 - 20,000 Hz)
Mid-Side Stereo (15.8 mV/Pa; 40 - 20,000 Hz)
Capsule Dimensions Impedance SPL/Noise
Diameter n/a
200 Ohms (Low) Max SPL: 127 dB
Weight Length Max Diameter Interface(s)
103g (3.63oz) 236mm (9.29'') 21mm (0.83'')
  • 5-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 11–52v

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