ATM73a Cardioid Condenser Headworn Microphone

Ideal for drummers, keyboard players or anyone requiring hands-free operation, the ATM73a features a comfortable, unobtrusive headband design with side-of-mouth pickup. Its belt-mounted power module operates on battery or phantom power.

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 improves isolation of desired sound source

Also available as ATM73cW – less power module; 55" (1.4 m) cable terminated with locking 4-pin connector for A-T UniPak™ wireless systems

SPECIFICATIONS
ELEMENT	Fixed-charge back plate, permanently polarized condenser
POLAR PATTERN	Cardioid
FREQUENCY RESPONSE	40-15,000 Hz
LOW FREQUENCY ROLL-OFF	80 Hz, 18 dB/octave
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
SIGNAL-TO-NOISE RATIO	59 dB, 1 kHz at 1 Pa
PHANTOM POWER REQUIREMENTS	11-52V DC, 2 mA typical
BATTERY TYPE	1.5V AA/UM3
BATTERY CURRENT / LIFE	0.4 mA / 1200 hours typical (alkaline)
SWITCH	Off, on-flat, on-roll-off
WEIGHT (MICROPHONE)	1.1 oz (31 g)
WEIGHT (POWER MODULE)	4.9 oz (139 g)
DIMENSIONS (MICROPHONE)	0.39" (10.0 mm) diameter
DIMENSIONS (POWER MODULE)	3.31" (84.0 mm) H x 2.48" (63.0 mm) W x 0.87" (22.0 mm) D
DIMENSIONS (HEADSET)	6.49" (165.0 mm) nominal at widest point, 2.64" (67.0 mm) flexible boom
OUTPUT CONNECTOR (POWER MODULE)	Integral 3-pin XLRM-type
CABLE	4.6' (1.4 m) long (permanently attached to microphone), 0.10" (2.6 mm) diameter, 2-conductor shielded cable with TA3F-type connector
ACCESSORIES FURNISHED	AT8531 power module; AT8128 windscreen; AT8125 windscreen; battery
AUDIO-TECHNICA CASE STYLE	M5