the AT2031 is the ideal microphone for stringed instruments in critical studio and live applications. Its permanently polarized element offers extended frequency response with a slight rise in the high frequency range for a more detailed sound. Its low self-noise and high SPL handling capability offer a wide dynamic range, perfectly suited for the most demanding applications.
The main features of the AT2031 includes:

Elements: Fixed-charge back plate, permanently polarized condenser
Polar Pattern: Cardioid
Frequency Response: 20–20,000 Hz
Low Frequency Roll-Off: 150 Hz, 6 dB/octave
Open Circuit Sensitivity: – 34 dB (19.9 mV) re 1V at 1 Pa (1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL)
Impedance: 85 ohms
Maximum Input Sound Level: 141 dB SPL, 1 kHz at 1% T.H.D.
Noise: 17 dB SPL
Dynamic Range (Typical): 124 dB, 1 kHz at max SPL
Signal-To-Noise Ratio: 77 dB, 1 kHz at 1 Pa
Phantom Power Requirements: 48V DC, 2mA typical
Switch: Flat, Roll-Off
Weight: 134g
Dimensions: 143.0 mm long, 21.0 mm maximum body Ø
Output Connector: Integral 3-pin XLRM-type
Accessories Included: AT8405a stand clamp; windscreen; soft protective pouch