1 RMS:125Wx4CH 2 Size:410x272x68mm 3 PCB double layer 4 terminal: perspective 5 Packing : color 6 heatsink :oxid black&line crack 7 Fequency response:20-22000Hz, 8 S/N : 97dB 9 T.H.D %: 0.015 10 LPF:50-250, 24dB/oct. 11 HPF : 50-250 Hz, 12 input sensitivity : 0.25-6.5V