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
32
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/cm2 = 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/cm2 = 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 gWeight
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 100k10010
Response in dB
Frequency in Hertz
10
0
-10
-20
-30
20
MT838
II
a / MT838
II
R / MT838
II
cW / MT838
II
cH
本产品使用直流 48V 幻象电源。
针脚1（接地）
针脚3
（负）
针脚2（正）
■
■
Audio-Technica Corporation
2-46-1 Nishi-naruse, Machida, Tokyo 194-8666, Japan
©2017 Audio-Technica Corporation
全球支持联系：www.at-globalsupport.com
响应单位是 dB
频率单位是赫兹
图例
0°，50 厘米
比例是每分隔线 5 分贝
图例
200 赫兹
1 千赫兹
5 千赫兹
8 千赫兹
感谢您购买本产品。在使用产品之前，请全文浏览本用户手册以确保您将正确地
使用本产品。请妥善保存本手册，以供将来参考。
■
• 高集成结构，清晰及准确的收音，可在教学、舞台、电视广播及宗教仪式上使用
• 小型及不显眼设计，合适于需要稳藏话筒的场合使用
• 配有一领带夹和金属网防风罩
• MT838IIa 和 MT838IIR 有线版本的电源模块(AT8531 / AT8538)设有高通滤波器，
可提供陡峭的低频衰减，从而改善声音拾取，而不会影响语音质量
• MT838IIa 的电源模块（AT8531）可以使用电池或幻像电源供电工作
• 无线版本的锁固式4针话筒输出端子，可配套连接于有线供电模组，或所有鐵三角
Audio-Technica cW 或 cH 型的盒式无线发射机
■使用注意事项
MT838IIa 有线版本配有一个AT8531供电模组，需要提供11V至52V幻象供电或1.5V
AA电池操作，当使用幻象电源操作时，可以不安装电池，供电模组的输出端为内置
3 针XLRM 卡农公头。供电模组内置高通滤波电路，可轻易由平直的频率响应，模
组的输出为3针XLRM型端子。
MT838IIR 有线版本配有一个AT8538供电模组，仅需要11V至52V直流幻象电源。
并具有高通滤波电路，提供于80 Hz以下衰减的收音效果，应用高通滤波器可减低
话筒在近距离讲话收音时的喷气声，并可减低收音环境中低频噪。
MT838IIcW 和 MT838IIcH 无线版本不带供电模组，但提供领带夹和金属网防风罩
，长1.8米音频线输出，可配置于所有鐵三角Audio-Technica cW 或 cH 型的盒式无
线发射机中。
把话筒暴露于高温中可能导致输出电平逐渐及永久性减弱，应避免将话筒留在日晒
的地方或长时间置于温度超过43°C的地方，而极高湿度也应避免。
■连接步骤
将AT8531/AT8538 供电模组的输出端子连接到具有兼容幻象电源的话筒输入（平
衡输入）的设备。输出接口是 XLRM 型接口，其极性如下图所示。
20-AUG-2020 Form No.ATGC-L0410-22
■
虽然本产品采用安全设计，但使用不当仍可能发生事故。为了确保安全，使用本
产品时请注意全部警告和提醒。
•切勿让本产品遭受强烈冲击，以避免发生故障。
•切勿拆开、改装或尝试维修本产品。
•切勿用湿手握持本产品，以免触电或受伤。
•切勿将本产品存放在阳光直射的地方、加热装置附近或者炎热、潮湿或多尘的
地方。
高通滤波
MT828cW ‒ 以锁固式4式针端子，使用于鐵三角 A-T UniPak® 盒式无线发射机
1
2
3
4
1
4
3
2
Tip
Ring
Sleeve
地线 / 屏蔽 乐器 话筒音频 偏压+输入
祼铜线 与 针脚1 跳线 白色 接3.3kΩ至针脚3
地线 / 屏蔽 偏压+输入 话筒音频 音源负载
祼铜线 接3.3kΩ至针脚3 白色 与 针脚1 跳线
地线 / 屏蔽 话筒音频 偏压+输入
祼铜线 白色 接2.2kΩ至Ring
MT828cT4 ‒ 以TA4F端子
MT828cLM3 ‒ 以锁固式3.5 mm端子
MT828cH ‒ 以锁固式4式针端子，使用于鐵三角 A-T CH型 盒式无线发射机
地线 / 屏蔽 乐器 话筒音频 偏压+输入
祼铜线 与 针脚1 跳线 白色 接3.3kΩ至针脚3
1
4
32
1
2
3
空置 空置 偏压+输入，话筒音频 地线 / 屏蔽
不连接 不连接 白色 祼铜线
MT828cL4 ‒ 以Lemo® 端子
固定充电背板，静电型电容式
全方向指向性
20 - 18,000 Hz
80 Hz, 12dB/倍频 (MT838IIa) / 80 Hz, 18dB/倍频 (MT838IIR)
-34 dB（19.9mV) 以 1V / 1Pa (
MT838IIa / MT838IIR
)
-62 dB（0.79mV) 以 1V / 1Pa (无线型号)
200 欧姆 (MT838IIa / MT838IIR)
1,600 欧姆 (无线型号)
0.2 mA 典型于 5V (无线型号)
直流 11-52V，2mA 典型 (MT838IIa / MT838IIR)
1.5V 5号电池 (MT838IIa)
•
1 帕＝ 10 达因/平方厘米＝ 10 微巴＝ 94 dB SPL
*
典型，A 计权，使用 Audio Precision System One
因产品改进，本产品会随时改装，恕不另行通知。
2.0 mA / 1200 小时 (MT838IIa)
平直，高通滤波 (MT838IIa / MT838IIR)
收音头: 长 19.4 mm, 直径 6.5 mm
内置式 3 针卡农公头
长 1.8 米 (固定连接于话筒), 直径 2.0 mm ,
收音头(不含连线): 7.7 克 供电模组 (AT8538): 81 克 / (AT8531): 81.2 克
领带夹；金属网防风罩；便携保护袋;
2芯屏蔽式连线并配置连接端子
(连接端子类型视乎不同型号)
(有线型号)- AT8531供电模组 (MT838IIa)
AT8538供电模组 (MT838IIR)
供电模组 (AT8538): 长 92.9 mm，外径 18.9 mm /
(AT8531): 高 83.0 mm, 宽 63.0 mm, 厚 22.0 mm
180°
150°
120°
30°
0°
330°
300°
270°
240°
210°
60°
90° 10 dB
1k 10k 100k10010
10
0
-10
-20
-30
20
/