lol i wus just being a smartass... idk, u should just try 2 12's its usually tha best. cuz they aint small like tens. and they got better sound quality then 15s... or u could do just one 15... depends on what u want. the only thing i would say is that bay music sounds good ina ported box, maybe a sealed box but dont get that bandpass box shit, (the ones wit clear plastic on it)
but whatever subs u get just make sure u get a good amp, i would go with kicker or something around that price range/quality. dont get them power akoustic/sonyxplod/lightning audio amps, go for something better