audio-technica ATM73a Cardioid Condenser Headword Microphones User Manual

: June 6, 2024
: Audio-Technica

Table of Contents

Features
Notes on use
Safety precaution
- Cautions for the product
Connection procedure
Specifications
References
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audio-technica ATM73a Cardioid Condenser Headword Microphones 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

Ideal for drummers, keyboard players or anyone requiring hands-free operation
Comfortable, unobtrusive headband design with side-of-mouth pickup
Belt-mounted power module operates on battery or phantom power
Cardioid polar pattern improving isolation of desired sound source
Rugged design and construction for reliable performance
ATM73a wired version’s power module (AT8531) includes a switchable 80 Hz high-pass filter minimizes pickup of undesired low-frequency sounds
Wireless version equipped with cW-style locking or cH-style screw-down 4-pin termination for Audio-Technica wireless systems

Notes on use

ATM73a 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. The output of the power module is a 3-pin XLRM-type connector.

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.

ATM73cW and ATM73cH wireless versions do not contain power module and includes clothing clip and metal-frame pop filter only. 1.4 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 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
_
_This product requires 48 V DC phantom power.

Specifications

Element	Fixed-charge back plate, permanently polarized condenser
Polar pattern	Cardioid
Frequency response	40 – 15,000 Hz
Low Frequency response	80 Hz, 18 dB/octave (wired only)
Open circuit sensitivity

Phantom: -55 dB (1.7 mV) re 1V at 1 Pa
Battery: -56 dB (1.5 mV) re 1V at 1 Pa

Impedance|

Phantom: 200 ohms
Battery: 270 ohms

Maximum input sound level|

Phantom: 146 dB SPL, 1 kHz at 1% T.H.D.
Battery: 132 dB SPL, 1 kHz at 1% T.H.D.

Dynamic range (typical)|

Phantom: 111 dB, 1 kHz at Max SPL
Battery: 97 dB, 1 kHz at Max SPL

Microphone: 31 g
Power module (wired only): 139 g

Dimensions|

Microphone: 10.0 mm diameter
Headset: 165.0 mm nominal at widest point, 67.0 mm boom
Power module: 84.0 mm (H), 63.0 mm (W), 22.0 mm (D)

Output connector| Integral 3-pin XLRM-type (Power module)
Cable| 1.4 m long (permanently attached to microphone), 2.6 mm diameter, 2-conductor shielded cable (termination dependent)
Included accessories| AT8125 windscreen;
AT8128 windscreen;
(wired only) – AT8531 power module (ATM73a)