Audio Technica BROADCAST & PRODUCTION MT828a User Manual

User Manual
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
• MT828a and MT828R 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 MT828a 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

■ Notes on use

MT828a 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.
MT828R 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.
MT828cW and MT828cH wireless versions do not contain power module and includes
clothing clip and metal-frame pop filter only. 1.6 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.

Output terminals

PIN1 (ground) PIN2 (hot)
PIN3
(cold)
Subminiature Cardioid Condenser Clip-On Microphones MT828a / MT828R / MT828cW / MT828cH
This product requires 48 V
DC phantom power.
■ Specifications
Element

Polar pattern

Frequency response

Low Frequency response
Open circuit sensitivity
Impedance
Phantom power requirements
Battery Type
Battery Current / Life
Switch
Current consumption
Weight
Dimensions
Output connector
Cable
Included accessories
• 1 Pascal = 10 dynes/cm = 10 microbars = 94 dB SPL
2
* Typical, A-weighted, using Audio Precision System One.
For product improvement, the product is sublect to modification without notice.
■Polar pattern ■Frequency response
0°
330° 30°
300°
60°
270°
90°
240° 120°
210° 150°
180°
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz

■Cable Terminations

MT828cW – Terminated with locking 4-pin connector for use with A-T UniPak
4
1
Pin 1
3 2
Function Ground / Shield Instrument
Wire Colour Copper Wire
MT828cH – Terminated with locking 4-pin connector for use with A-T CH body-pack transmitters
4 Pin 1
1
Function Ground / Shield Instrument
Wire Colour Copper Wire
3
2
MT828cT4 – Terminated using TA4F-type connector
3
1
Pin 1
Function Ground / Shield Blas + In
2 4
Wire Colour Copper Wire
®
MT828cL4 – Terminated using Lemo connector
1
Pin 1
2
3
Function N/C
Wire Colour Open
MT828cLM3 – Terminated using locking 3.5 mm connector
Ring
Sleeve Tip
Sleeve
Function Ground / Shield Mic Audio
Wire Colour Copper Wire
Audio-Technica Corporation
2-46-1 Nishi-naruse, Machida, Tokyo 194-8666, Japan
©2017 Audio-Technica Corporation
Global Support Contact: www.at-globalsupport.com
Fixed-charge back plate, permanently polarized condenser
Cardioid
100 - 12,000 Hz
80 Hz, 12dB/octave (MT828a) / 80 Hz, 18dB/octave (MT828R)
-36 dB (15.8 mV) re 1V at 1 Pa (MT828a / MT828R)
-64 dB (0.63 mV) re 1V at 1 Pa (wireless only)
200 ohms (MT828a / MT828R)
1,600 ohms (wireless only)
11-52 V DC, 2 mA typical (MT828a / MT828R)
1.5V AA (MT828a)
2.0 mA / 1200 hours (MT828a)
Flat, roll-off (MT828a / MT828R)
0.2 mA typical at 5V (wireless only)
Microphone, boom and earpiece: 1.3 g
Power module (AT8538): 81 g / (AT8531): 81.2 g
Microphone: 19.4 mm long, 7.5 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)
Integral 3-pin XLRM-type (MT828a / MT828R)
1.6 m long (permanently attached to microphone),
2.0 mm diameter, 2-conductor shielded cable
(termination dependent)
Wire clothing clip; metal-frame pop filter; protective pouch;
(wired only) - AT8531 power module (MT828a) /
AT8538 power module (MT828R)
20
10
0
-10
-20
-30
10 100 1k 10k
Frequency in Hertz
LEGEND
0°, 50cm
Roll-off
®
body-pack transmitters
Pin 2 Pin 3 Pin 4
Mic Audio Blas + In
Jumper to Pin 1 White 3.3kΩ to Pin 3
Pin 2 Pin 3 Pin 4
Mic Audio Blas + In
Jumper to Pin 1 White 3.3kΩ to Pin 3
Pin 2 Pin 3 Pin 4
Mic Audio Source Load
3.3kΩ to Pin 3 White Jumper to Pin 1
Pin 2 Pin 3 Shell / Case
N/C Blas + In, Mic Audio Ground / Shield
Open White Copper Wire
Ring Tip
Blas + In
White 2.2kΩ to Ring
20-AUG--2020 Form No.ATGC-L0378-20
10 dB
100k