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Stereo Shotgun Microphone

  • 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 BP4027 requires 11V to 52V DC phantom power on Pins 2 and 3 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 BP4027 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 BP4027 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 BP4027 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.”

    • audio technica BP4027
  • BP4027 Specifications


    Fixed-charge back plate permanently polarized condenser

    Polar Pattern

    Line-cardioid and figure-of-eight

    Frequency Response

    30 ~ 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


    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


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


    142 g


    380.0 mm long, 21.0 mm diameter


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

    Accessories Furnished

    AT8405a stand clamp for ⅝”-27 threaded stands;
    AT8135 foam windscreen;
    ⅝”-27 to ⅜”-16 threaded adapter;
    protective carrying case


    audio technica support 363_1_BP4027.pdf - Operation Manual