audio technica MT838IIa Subminiature Omnidirectional Condenser Clip-On Microphones User Manual

audio technica MT838IIa Subminiature Omnidirectional Condenser Clip-On Microphones

Thank you for purchasing this product. Before using the product, read through the user manual to ensure that you will use the product correctly. Please keep this manual for future reference.

Features

• 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 and MT838IIR wired version’s power module (AT8531 / AT8538) includes a
  high-pass filter that provides a steep low-frequency attenuation to improve sound pickup without affecting voice quality

• The power module (AT8531) of MT838IIa can be operated on battery or phantom power

• Wireless version equipped with cW-style locking or cH-style screw-down 4-pin termination for Audio-Technical wireless systems

Notes on use

MT838IIa wired version 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 output of the power module is a 3-pin XLRM-type connector.
MT838IIR wired version includes a power module AT8538 that requires 11V to 52V DC phantom power only. Also has an integral 80Hz high-pass filter for 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.
MT838IIcW and MT838IIcH wireless versions do not contain power module and includes clothing clip and metal-frame pop filter only. 1.8 m cable terminated with locking 4-pin connector. The connector is also compatible with Audio- Technica cW and cH type body-pack transmitters.
Avoid leaving the microphone in the open sun or in areas where temperatures exceed 43°C for extended periods. Extremely high humidity should also be avoided.

Safety precaution

Although this product was designed to be used safely, failing to use it correctly may result in an accident. To ensure safety, observe all warnings and cautions while using the product.

Cautions for the product

• Do not subject the product to strong impact to avoid malfunction.
• Do not disassemble, modify or attempt to repair the product.
• Do not handle the product with wet hands to avoid electric shock or injury.
• Do not store the product under direct sunlight, near heating devices or in a hot, humid or dusty place.

Connection procedure

Connect the output terminals of AT8531 or AT8538 power module to a device that has a microphone input (balanced input) compatible with a phantom power supply. The output connector is an XLRM-type with polarity as shown in the figure below.

Specifications

(MT838IIR)
Open circuit sensitivity| 34 dB (19.9 mV) re 1V at 1 Pa (MT838lla / MT838IIR)

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

Impedance| 200 ohms (MT838lla / MT838IIR)

1,800 ohms (wireless only)

Phantom power requirements| 11-52 V DC, 2 mA typical (MT838lla / MT838IIR)
Battery Type| 1.5V AA (MT838lla)
Battery Current / Life| 2.0 mA / 1200 hours (MT838lla)
Switch| Flat, roll -off (MT838lla / MT838IIR)
Current consumption| 0.2 mA typical at 5V (wireless only)
Weight| Microphone, boom and earpiece: 7.7 g

Power module (AT8538): 81 g / (AT8531): 81.2 g

Dimensions| Microphone: 21.5 mm long, 6.5 mm diameter

Power module (AT8538): 92.9 mm long, 18.9 mm diameter/

(AT8531 ): 83.0 mm x 63.0 mm x 22.0 mm (H x W x D)

Output connector| Integral 3-pin XLRM-type (MT830a / MT830R)
Cable| 1.8 m long (permanently attached),

2.0 mm diameter, 2-conductor shielded cable

(termination dependent)

Included accessories| Wire clothing clip; Windscreens; protective pouch;

(wired only) – AT8531 power module (MT838lla) /

AT8538 power module (MT838IIR)

• 1 Pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL
• Typical, A-weighted, using Audio Precision System One.
  For product improvement, the product is sublet to modification without notice

Polar pattern

Frequency response

Cable Terminations

MT828cW – Terminated with locking 4-pin connector for use with A-T UniPak® body-pack transmitters

MT828cH – Terminated with locking 4-pin connector for use with A-T CH body- pack transmitters

MT828cH – Terminated with locking 4-pin connector for use with A-T CH body- pack transmitters

MT828cL4 – Terminated using Lemo® connector

MT828cLM3 – Terminated using locking 3.5 mm connector

Audio-Technica Corporation
2-46-1 Nishi-naruse, Machida, Tokyo 194-8666, Japan
©2017 Audio-Technica Corporation
Global Support Contact: www.at-globalsupport.com

References

• Global Support｜Audio-Technica Corporation オーディオテクニカ

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