![Amazon.com: MTX MUD100.4 Mud Series 400 Watt RMS 4 Channel Class D Compact Weatherproof Outdoor Powersports ATV UTV Motorcycle Sound System Stereo Amplifier Kit : Electronics Amazon.com: MTX MUD100.4 Mud Series 400 Watt RMS 4 Channel Class D Compact Weatherproof Outdoor Powersports ATV UTV Motorcycle Sound System Stereo Amplifier Kit : Electronics](https://m.media-amazon.com/images/I/61LvSgjRS+L.jpg)
Amazon.com: MTX MUD100.4 Mud Series 400 Watt RMS 4 Channel Class D Compact Weatherproof Outdoor Powersports ATV UTV Motorcycle Sound System Stereo Amplifier Kit : Electronics
![GM-D1004 - 4-Channel - Class D, 400w Max Power - Compact Bridgeable Amplifier | Pioneer Electronics USA GM-D1004 - 4-Channel - Class D, 400w Max Power - Compact Bridgeable Amplifier | Pioneer Electronics USA](https://www.pioneerelectronics.com/StaticFiles/PUSA/Car%20Electronics/Product%20Images/Amplifiers/GM-D1004/GM-D1004_large.jpg)
GM-D1004 - 4-Channel - Class D, 400w Max Power - Compact Bridgeable Amplifier | Pioneer Electronics USA
![FOCAL FDS 4.350 CLASS D ULTRA COMPACT 4CH AMPLIFIER 58RMSX4@4OHMS/100RMSX4@2OHMS/200RMSX2@4OHMS - Driving Sound FOCAL FDS 4.350 CLASS D ULTRA COMPACT 4CH AMPLIFIER 58RMSX4@4OHMS/100RMSX4@2OHMS/200RMSX2@4OHMS - Driving Sound](https://drivingsound.co.nz/wp-content/uploads/2020/09/fd4.350-scaled.jpg)
FOCAL FDS 4.350 CLASS D ULTRA COMPACT 4CH AMPLIFIER 58RMSX4@4OHMS/100RMSX4@2OHMS/200RMSX2@4OHMS - Driving Sound
![Amazon.com: ALPINE KTA-450 400w 4-Channel Amplifier Small Footprint Saddlebag Motorcycle Amp : Electronics Amazon.com: ALPINE KTA-450 400w 4-Channel Amplifier Small Footprint Saddlebag Motorcycle Amp : Electronics](https://m.media-amazon.com/images/I/71qZPplH9vL.jpg)