I installed a BOSS marine/powersports stereo in my Can Am Defender along with 4 Kicker 6.5" coaxial speakers with disappointing results. It sounded like an am radio. After I installed this NVX NDA6004 amp, it woke up the system and then I added a $130 Rockville 8" powered sub and now this system is as good as any premium factory stereo install. I am really pleased with the result. Rather than spending $3500 for the Can Am media roof I have $800 total in this system and it plays loud, clear music with great base. Very pleased I went with this amp.