Amazon.com: DS18 SXE-4000.4D/RD Car Amplifier Stereo Full-Range Class D 4-Channel 275x4 RMS @4 OHM 4000 Watts - Powerful and Compact Amp for Speakers in Car Audio System : Electronics
Genius GPRO-M1065 6.5" 300 Watts-Max Midrange Marathon Series Car Audio Speaker 4-Ohms : Amazon.com.au: Electronics
Skar Audio FSX65-4 6.5" 300 Watt 4 Ohm Pro Audio Midrange Loudspeaker, Each
Amazon.com: BOSS Audio Systems MC900B Amplifier for ATV UTV Car Marine - 500 High Output, 4 Channel, 2/4 Ohm, Bluetooth Multi-Function Remote, RCA Out, Weatherproof, Use Amp with Stereo and Subwoofer, Crossover : Electronics
Amazon.com: Genius Audio GFX-55X4 Full Range Powered Car Amplifier Multichannel 1200 Watts Max Class AB 2-Ohm Stable with Power Protection System to Boost Speaker and Woofer Performance : Electronics
Amazon.com: Pyle Home Marine Car Amplifier - 4-Channel Compact 400 Watt RMS 4 OHM Full Range Monoblock Stereo & Waterproof - Wireless Bluetooth Receiver Audio Speaker w/ LCD Digital Screen (PFMRA450BW) : Electronics