Ideal for close-up vocals, overheads, piano and strings
Sound is similar to far more expensive studio microphones
Low-mass diaphragm ensures minimum distortion
Cardioid pattern provides added warmth when used close up
Operates on battery or phantom power

ATM31a Specifications
Element Dynamic Range (Typical)
Condenser
PHANTOM: 113 dB, 1 kHz at Max. SPL
BATTERY: 99 dB, 1 kHz at Max. SPL

Polar Pattern Phantom Power Requirements
Cardioid
9 - 52V, 2 mA typical

Frequency Response Battery Type
30 - 20,000 Hz
1.5V AA/UM3

Open Circuit Sensitivity Battery Current/Life
PHANTOM: -44 dB (6.3 mV) re 1V at 1 Pa
BATTERY: -45 dB (5.6 mV) re 1V at 1 Pa
0.4 mA/1200 hours typical

Impedance Weight
PHANTOM: 200 ohms
BATTERY: 270 ohms
7.1 oz (200 g)

Maximum Input Sound Level Output Connector
PHANTOM: 137 dB SPL, 1 kHz at 1% T.H.D.
BATTERY: 123 dB SPL, 1 kHz at 1% T.H.D.
XLRM-type

Signal to Noise Ratio
70 dB, 1 kHz at 1 Pa

Accessories Furnished:
AT8405 stand clamp; AT8114 foam windscreen; battery; protective pouch