No description

Sub-mini Omnidirectional Condenser Clip-on Mic.

  • Maximum intelligibility and clean, accurate reproduction for lecturers, stage and television talent, and worship leaders.
  • Low-profile design is ideal for applications requiring minimum visibility.
  • Includes a wire clothing clip and a metal-frame pop filter.
  • MT838IIa is switchable for low-frequency roll-off reduces sensitivity to popping in close vocal use.
  • MT838IIa can be operated on battery or phantom power.

    The MT838IIa is worn on the clothing of performers for excellent yet unobtrusive sound pickup. Its small size makes the microphone ideal for use in applications where minimum visibility is required. Close-up voice pickup is crisp and clean, and the omnidirectional polar pattern of the microphone assures nearly equal sound pickup from every direction across a wide band frequencies.

    The included clothing clip and metal-frame pop filter are removable. When using the MT838IIa in extremely close situations, slip the included metal-frame pop filter over the mic to reduce wind noise or “poping”.

    Includes a power module AT8531 that requires 11V to 52V DC phantom power, or a 1.5V AA battery for operation. A battery need not be in place for phantom power operation.

    An integral 80Hz high-pass filter provides easy switching from a flat frequency response to a low-end roll-off. The roll-off position reduces the pickup of low-frequency ambient noise (such as traffic, air-handling systems, etc.), room reverberation and mechanically coupled vibrations.

    Output from the power module’s XLRM-type connector is low impedance (Lo-Z) balanced. The signal appears across Pins 2 and 3; Pin 1 is ground (shield). Output phase is “Pin 2 hot” - positive acoustic pressure produces positive voltage at Pin 2. To avoid phase cancellation and poor sound, all mic cables must be wired consistently: Pin 1-to-Pin 1, etc.

    • audio technica MT838IIa
  • MT838IIa Specifications


    Fixed-charge back plate, permanently polarized condenser

    Polar Pattern


    Frequency Response

    20 ~ 18,000 Hz

    Open Circuit Sensitivity

    -62dB(0.79mV) re 1V at 1 Pa


    1,800 Ω (capsule)

    Power Supply

    1.5~10V DC (capsule)

    Low Frequency Roll-Off

    80 Hz, 12 dB/octave

    Phantom Power

    11~52V DC, 2 mA typical

    Battery Type

    1.5V AA/UM3

    Battery Current / Life

    2.0 mA / 1200 hours


    Off, Flat, roll-off


    Microphone: 7.7 g;
    Power Module: 81.2 g


    Microphone: 21.5 mm - long, 6.5 mm - diameter Power Module: 83.0 mm - H x 63.0 mm - W x 22.0 mm - D

    Output Connector

    Integral 3-pin XLRM-type


    1.8 m long (permanently attached to microphone), 2 mm diameter

    Accessories Furnished

    Wire clothing clip; metal-frame pop filter; protective pouch; AT8531 power module


    audio technica support 176_1_MT838II.pdf - Operation Manual