Cardioid Condenser Headworn Microphone

  • Professional-quality vocal pickup with hands-free operation
  • Low-visibility headband provides stable, comfortable fit
  • Pivot-mounted flexible microphone
  • Belt-mounted power module AT8531 operates on battery or phantom power
  • Cardioid polar pattern improves isolation of desired sound source
  • Also available with HRS connector (ATM75cW) for A-T UniPak wireless system

Cardioid Condenser Headworn Microphone

The ATM75 is a headworn condenser microphone with a cardioid polar pattern. It is designed for use by performing musicians and others who require professional-quality vocal pickup with hands-free operation. . The belt-mounted power module operates on either battery or phantom power.

  • Ideal for drummers, keyboard players, guitarists or anyone requiring hands-free operation
  • Low-visibilty headband provides stable, comfortable
  • Pivot-mounted exible mic boom descends from left or right side
  • Belt-mounted power module operates on battery or phantom power
  • Cardioid polar pattern reduces pickup of sounds from the sides and rear, improving isolation of desired sound source
  • Rugged design and construction for reliable performance
  • Switchable 80 Hz high-pass lter minimizes pickup of undesired low-frequency sounds
  • Also available in two additional versions (without power module) ATM75cW— cable terminated for A-T UniPak® wireless systems ATM75c—unterminated cable

Technical Info

Element Fixed-charge back plate, permanently polarized condenser
Polar Pattern Cardioid
Frequency Response 100 – 13,000 Hz
Open Circuit Sensitivity Phantom: -51 dB (2.8 mV) re 1V at 1 Pa
Battery: -53 dB (2.2 mV) re 1V at 1 Pa
Impedance Phantom: 200 ohms
Battery: 270 ohms
Maximum Input Sound Level Phantom: 132 dB SPL, 1 kHz at 1% T.H.D.
Battery: 121 dB SPL, 1 kHz at 1% T.H.D.
Low Frequency Roll Off 80 Hz, 18 dB/octave
Switches Off, on-flat, on-roll-off
Dynamic Range Phantom: 96 dB, 1 kHz at Max SPL
Battery: 85 dB, 1 kHz at Max SPL
Signal-to-Noise Ratio 58 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 / 2000 hours typical (alkaline)
Weight Microphone: 60 g (2.1 oz)
Power module: 139 g (4.9 oz)
Dimensions Microphone: 20.4 mm (0.80″) diameter
Power module: 84.0 mm (3.31″) H x 63.0 mm (2.48″) W x 22.0 mm (0.87″) D
Headset: 120.0 mm (4.72″) nominal at widest point, 80.5 mm (3.17″) flexible boom
Output Connector Power module: Integral 3-pin XLRM-type
Cable 4.6′ (1.4 m) long (permanently attached to microphone), 0.11″ (2.8 mm) diameter, 2-conductor shielded cable with TA3F-type connector
Accessories Included AT8531 power module; AT8439 clothing clip; AT8139L large windscreen; AT8139S small windscreen; battery