2231 Technical Parameters:

Frequency bandwidth: 20Hz-20Hz+0.5dB/-1dB

Dynamic range:>109dB, 115dB 

Signal noise ratio:90dB,97dB

Total harmonic distortion + noise:<0.005%

Channel crosstalk:<-80dB, 20Hz-20KHz

Interface: 1/4 inch TRS, XLR socket (two feet to the hot end, the female head) and strip terminal

Category:Electronic balance / unbalance, with radio frequency filter

Impedance: balance is 40Ω, imbalance is 20KΩ

Maximum input level:>+21dBu, balanced and unbalanced

Ratio of the horizontal batch system:>40dB typical value>50dB, 1kHz