The vehicle is a 2006 cadillac cts Right now i have 2 jl w3 12'' v1's in a i believe 3.5-4 cu ft box tuned to 33hz running off a chitttty pioner 760w amp that i picked up off a buddy when my jl 500/1 blew.. The amp puts out id say roughly 300-350w actual Now i just got an awesome deal on a kicker zx 750.1 and my subs wont run on the proper ohm to utilize this amp properly. So i decided im gonna give FI a try. I'd like to go with a single 12'' to be able to see some of my trunk again. I couldn't imagine having any less bass then i have now, i know im going to be doubling the power, but also having 1/2 the cone area. Do you think the SSD will be able to fill my need for bass off the 750.1 or would the Q get louder? Im not to familiar with these subs but ive heard lots of good things, i hate to compair to mainstream but what sub(s) do the SSD compare to? I'm familiar with JL,kicker, and RE the most so if any of those have a sub that compare to the SSD what would it be?Also what sub would the Q compare to, i know every sub is different and what not, but im looking for the closest comparision you could give me... Thanks for reading my long unorganized ramble, i look forward to dealing with FI!!