1 RMS100Wx4+300W 2 Size:540x272x68mm 3 PCB single layer 4 terminal: perspective 5 Packing : color 6 heatsink :oxid black&line crack 7 Fequency response:20-20000Hz, 8 S/N : 95dB 9 T.H.D %: 0.015 10 LPF:50-250, 24dB/oct. 11 HPF : 50-250 Hz, 12 input sensitivity : 0.25-6.5V any more information,Please visit our website: