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Omnidirectional Condenser Microphone

  • The AT4049b is an Omnidirectional condenser microphone intended for use in professional applications where remote power is available.
  • Specially engineered to meet the most critical acoustic requirements of professional recording, broadcast and sound reinforcement
  • Direct-coupled, balanced output results in a clean signal even under high-output conditions
  • Transformerless circuitry virtually eliminates low-frequency distortion and provides superior correlation of high-speed transients
  • Switchable 80 Hz hi-pass filter and 10 dB pad
  • Rugged turned-brass microphone housing for enduring dependability
  • State-of-the-art design and manufacturing techniques ensure compliance with A-T’s stringent consistency and reliability standards

    • audio technica AT4049b
  • AT4049b Specifications


    Externally polarized (DC bias) capacitor

    Polar Pattern


    Frequency Response

    20 ~ 20,000 Hz

    Low Frequency Roll-Off

    80 Hz, 12 dB/octave

    Open Circuit Sensitivity

    -34 dB (19.9 mV) re 1V at 1 Pa


    50 Ω

    Maximum Input Sound Level

    146 dB SPL, 1 kHz at 1% T.H.D.;
    155 dB SPL, with 10 dB pad (nominal)


    16 dB SPL

    Dynamic Range (Typical)

    129 dB, 1 kHz at Max SPL

    Signal-To-Noise Ratio

    78 dB, 1 kHz at 1 Pa

    Phantom Power

    48V DC, 4.8 mA typical


    Flat, roll-off; 10 dB pad (nominal)


    130 g


    21.0mm X 155.0mm(Diameter X Long)

    Output Connector

    Integral 3-pin XLRM-type

    Accessories Furnished

    AT8405a stand clamp for ⅝”-27 threaded stand; windscreen; protective carrying case


    audio technica support AT4049b.pdf - Operation Manual