hey guys im new to this forum anyways , I have been asking around and i always keeping getting diffrent answers Can anywone tell me wich one hits harder 12"s or 15"s my installer keeps telling me the smaller the woofer the harder it will hit, i am looking for hard hitting bass not for SQ , my setup befor was 2 l7 12s hooked up to a T4000.1Bd and now i got 2 RE audio MX15's , i dont like the way the RE 's sound I am looking to puchase FI BTLS but my Installer keeps telling me to go with 12"s insted of 15"s , Any advice will help and again I am looking for hard hitting bass not SQ ,Thanks again - Art