car amplifier:SA-2090 1 RMS:80Wx2CH 2 Size:280x260x50mm 3 PCB single layer 4 terminal: Normal 5 Packing : color 6 heatsink :oxid black& line crack car amplifier:SA-4090 1 RMS:70Wx4CH 2 Size:330x260x50mm 3 PCB single layer 4 terminal: Normal 5 Packing : color 6 heatsink :oxid black& line crack As the professional manufacturer of car audio and video, we can provide all kinds of car ampliier with the surper quality and competitive price. If any interests,please feel free to contact us, we will do our best to meet your demand.