User Manual
Subminiature Omnidirectional Condenser Clip-On Microphones MT838
II
a / MT838
II
R / MT838
II
cW / MT838
II
cH
■
Features
■
Notes on use
■
Connection procedure
This product requires 48 V
DC phantom power.
Output terminals
PIN1 (ground)
PIN3
(cold)
PIN2 (hot)
■
Polar pattern
■
Frequency response
■
Cable Terminations
Audio-Technica Corporation
2-46-1 Nishi-naruse, Machida, Tokyo 194-8666, Japan
©2017 Audio-Technica Corporation
Global Support Contact: www.at-globalsupport.com
20-AUG--2020 Form No.ATGC-L0410-22
LEGEND
0°, 50cm
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
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.
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.
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.
• 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-Technica wireless systems
■
Safety precaution
■
Cautions for the product
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.
• 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.
Roll-off
MT828cW – Terminated with locking 4-pin connector for use with A-T UniPak
®
body-pack transmitters
MT828cT4 – Terminated using TA4F-type connector
MT828cLM3 – Terminated using locking 3.5 mm connector
MT828cH – Terminated with locking 4-pin connector for use with A-T CH body-pack transmitters
1
2
3
4
1
4
3
2
Tip
Ring
Sleeve
1
4
3
2
Pin 1
Pin 2
Pin 3
Pin 4
Function Ground / Shield Instrument
Mic Audio
Blas + In
Wire Colour Copper Wire
Jumper to Pin 1 White
3.3kΩ to Pin 3
Pin 1
Pin 2
Pin 3
Pin 4
Function Ground / Shield Blas + In
Mic Audio
Source Load
Wire Colour Copper Wire
3.3kΩ to Pin 3
White
Jumper to Pin 1
Pin 1
Pin 2
Pin 3
Pin 4
Function Ground / Shield Instrument
Mic Audio
Blas + In
Wire Colour Copper Wire
Jumper to Pin 1 White
3.3kΩ to Pin 3
Sleeve
Ring
Tip
Function Ground / Shield Mic Audio
Blas + In
Wire Colour Copper Wire
White
2.2kΩ to Ring
MT828cL4 – Terminated using Lemo
®
connector
1
2
3
Pin 1
Pin 2
Pin 3
Shell / Case
Function N/C
N/C
Blas + In, Mic Audio Ground / Shield
Wire Colour Open
Open
White
Copper Wire
•
1 Pascal = 10 dynes/cm
2
= 10 microbars = 94 dB SPL
*
Typical, A-weighted, using Audio Precision System One.
For product improvement, the product is sublect to modification without notice.
■
Specifications
Fixed-charge back plate, permanently polarized condenser
Omnidirectional
20 - 18,000 Hz
80 Hz, 12dB/octave (MT838IIa) / 80 Hz, 18dB/octave (MT838IIR)
-34 dB (19.9 mV) re 1V at 1 Pa (MT838IIa / MT838IIR)
-62 dB (0.79 mV) re 1V at 1 Pa (wireless only)
200 ohms (MT838IIa / MT838IIR)
1,800 ohms (wireless only)
11-52 V DC, 2 mA typical (MT838IIa / MT838IIR)
1.5V AA (MT838IIa)
2.0 mA / 1200 hours (MT838IIa)
Flat, roll-off (MT838IIa / MT838IIR)
0.2 mA typical at 5V (wireless only)
Power module (AT8538): 92.9 mm long, 18.9 mm diameter /
Microphone: 21.5 mm long, 6.5 mm diameter
•
1 Pascal = 10 dynes/cm
2
= 10 microbars = 94 dB SPL
*
Typical, A-weighted, using Audio Precision System One.
For product improvement, the product is sublect to modification without notice.
Integral 3-pin XLRM-type (MT830a / MT830R)
Element
Polar pattern
Frequency response
Low Frequency response
Open circuit sensitivity
Impedance
Phantom power requirements
Battery Type
Battery Current / Life
Switch
Current consumption
Dimensions
Output connector
Cable
1.8 m long (permanently attached),
Microphone, boom and earpiece: 7.7 g
Weight
Power module (AT8538): 81 g / (AT8531): 81.2 g
Included accessories
Wire clothing clip; Windscreens; protective pouch;
2.0 mm diameter, 2-conductor shielded cable
(termination dependent)
(wired only) - AT8531 power module (MT838IIa) /
AT8538 power module (MT838IIR)
(AT8531): 83.0 mm x 63.0 mm x 22.0 mm (H x W x D)
180°
150°
120°
30°
0°
330°
300°
270°
240°
210°
60°
90°
10 dB
1k
10k
100k
100
10
Response in dB
Frequency in Hertz
10
0
-10
-20
-30
20
