DS18 SXE-3000.4D Class D 4-Channel Full-Range Car Amplifier 200 x 4 RMS @ 4 OHM 3000 Watts
Amazon.com: Massive Audio Blade BP1000.4 Car Stereo Amplifier. 4 Channel Amplifier 1000 Watts, Class A/B, 2 Ohm Stable, with Bass Boost. The Best 4- Channel Car Amplifier with Built-in OEM Line Converter :
Audiopipe APMN-4080 Class AB 78 Watts x 4-Channel Mini Amplifier