The regular Arc Audio is a great choice as well, not really big, not really heavy, takes a bit of air space, 16mm xmax is nice for some decent SPL, plays fairly low, great SQ.
We have a 15" flush mounted in the floor of our tC in a 2.2 cube sealed box, total weight is 42lbs with the enclosure. Arc 2500 for power, averaged 138.4 dB for 2 minutes on music and a new kind of competition. No loss of interior space, three amps and a big sub and some storage room left, stealthy all the way
We use the 10" verison for our under front passenger seat sub system we manf for the Subaru Impreza chassis cars, STI, WRX, Forester, etc. Excellent up front bass, great SQ, decent SPL, only 17lbs total weight and totally stealth.
Just another option, so many great subs on the market today, I just need a flat one that has some SPL for other cars with less room under the seats, anything new on the horizon?
We have a Flatline on hand to test in our car, just no time yet to do so, going to build a new enclusure so we can just swap them back and forth to see what we prefer. I have heard this sub quite alot in other installs, sweet indeed
Rick