Professional-quality vocal pickup with hands-free operation
Low-visibility headband provides stable, comfortable fit
Pivot-mounted flexible mic boom descends from left or right side
Belt-mounted power module operates on battery or phantom power
55" (1.4 m) cable permanently attached between microphone and power module
Also available as:
ATM75c -- less power module; 7.2' (2.2 m) cable, unterminated; Wiring info (pdf - 67KB)
ATM75cW -- less power module; 55" (1.4 m) cable terminated with locking 4-pin connector for A-T UniPak™ wireless systems

ATM75 Specifications
Element Phantom Power Requirements
Condenser
9 - 52V, 2 mA typical

Polar Pattern Battery Type
Cardioid
1.5V AA/UM3

Frequency Response Battery Current/Life
60 - 15,000 Hz
0.4 mA/2000 hours typical

Open Circuit Sensitivity Switch
PHANTOM: -51 dB (2.8 mV) re 1V at 1 Pa
BATTERY: -53 dB (2.2 mV) re 1V at 1 Pa
Off/on-flat/on-roll-off

Impedance Low Frequency Roll-off
PHANTOM: 200 ohms
BATTERY: 270 ohms
80 Hz, 18 dB per octave

Maximum Input Sound Level Weight
PHANTOM: 132 dB SPL, 1 kHz at 1% T.H.D.
BATTERY: 121 dB SPL, 1 kHz at 1% T.H.D.
2.1 oz (60 g)

Signal to Noise Ratio Power Module
58 dB, 1 kHz at 1 Pa
In-line

Dynamic Range (Typical) Output Connector
PHANTOM: 96 dB, 1 kHz at Max. SPL
BATTERY: 85 dB, 1 kHz at Max. SPL
XLRM-type (power module)

Accessories Furnished:
AT8139L large windscreen; AT8139S small windscreen; AT8439 clothing clip; AT8530 power module (attached); battery