amplification: 7 times gain:16DB input voltage:100mv~2000mv output voltage:0.7V~14V frequency response:18Hz~22khz±1dB signal to noise ratio:95dB unbalance inputs:4(pairs) balance input:1(pair) unbalance outputs:2(pairs) balance outputs:2(pairs) distortion factor:≤0.09% input impedance:600Ω output impedance:22K balance input impedance:150Ω+150Ω balance output impedance:5.5K+5.5K