RF-3000D CLASS D TECHNOLOGY FOB 1 RMS:3200Wx1CH @ 1Ohm DC 14.4V 2 Size:580x265x60mm 3 PCB double layer 4 terminal:greatness & perspective 5 Packing : Normal 6 heatsink :oxid & luster 7 G.w:17kg 7 Fequency response:15-350Hz, 8 S/N : 115dB 9 T.H.D % : 0.025 10 LPF:50-250, 12dB/oct. 11 Subsonic : 15-50Hz , 12 input sensitivity : 0.25-7.5V RF-2500D CLASS D TECHNOLOGY FOB $250.0/100PCS