I had 2 of there pro series 15s and went 151bd with a box that was built to play music but would play notes alright not the best. I also currently have there 1100 watt amp on my interior speakers in my car(no beat in the trunk) very loud! I used to be a huge DB drive fan but there stuff is kinda expensive now so i went with Interfire stuff cause the quality is just as good with a better price..