deceptikon
Junior Member
I currently have an Alpine 9815...A 10" L7 solobaric with the factory ported box that is being powered by a Sony Explod d1000p5 which says 1600 w, but i know thats bull...My question is that when I purchased the sub..the dealer recommended that I get a subsonic filter which was built into a kicker crossover. I thought this guy was just trying to get another 100 bones off of me..but after reading around..I think he was right. Do i need it. What exactly does it do?
