4 Channel Car Audio Amplifier 4 Channel High Power 300W Push Bass Amp Amplifiers Item: 4 Channel High Power Amplifer Product Type: C-236 Input resistance: 4ohm Input sensitivity: 92db Power: 6800w Voltage: 12v Package: 1pc x12v Car amplifier Kindly Reminder: Shipment by DHL,EMS,Fedex,BlueDart or China post air parcel . depends on seller choice without notice! thanks for your cooperation!