i previously had a 15 inch HDC3 and abo****ly loved it box was 8 Cubic feet insanely huge took out my whole back seat on my chevy so the box would fit anywho im going smaller wana leave the seat in this seat so just gona mount the box on top of my seat some how so it wont move hmmmm, but anyways i was thinking of going with a 12 SDC2 512 subwoofer, its 140$ pretty good my hdc was like 300 but same company they say its the same sub but is it worth it? will i have the Insane sound i got from that sdc2 sub? i had a 4000RMS amp btw my v8 alternator is stock so im sure it was pushing around 1k at the most with the dimms i got, old timer havent been in market for a while so any other advice is good im also looking for a nice 1000rms or 1200RMS amp for the sub to budjet is around 200 for amp sorry about spelling guys im rushing to work //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif