Hello, this is my first post on here. Basically awhile ago I told my friend I wanted subwoofers and he ordered everything for me and I just paid him. After I got them though I started learning a lot more on my own about car audio in general. Anyways I have 2 Kenwood KFC-W3013PS and a Planet Audio AC2000.2 two channel amp. I'm basically looking for 2 12 or 15 inch subs and an amp to replace them. Quality is meaningful but I basically want to just bump as loud as I can for my money, I want my 04 Impala to rattle like an earthquake. I am looking to spend $500-$600 on both the subs and then however much a matching amp would cost for those. Thanks for your help!