how do I get more bass in my cabin? i have subs in trunk
first time posting here, I have a 99 318i and i got tired of the stock radio so I upgraded my deck to alpine 9835, JBL 1200.1 amp, JL 12W7 in 1.65 cu feet seald box. I still have the stock speakers in the front. I've removed the rear deck speakers since the bass is all trapped in the bass. I have no ski hole. What should I do? i've heard ppl cutting the rear decks. But I am not tooo sure what to do.