just saw all these posts, under tuning w/ real power?..... is on 300 watts haha, ive pushed the sub before, so i know that im not playing at even 2/3 if what the suspension can move at, and i have yet to smell the sub getting warm or feel it getting warm, i cant be hurting it too much, but this 15" is just temp until the summer, also this is an extremely old box, like 7years, one of the first boxes i made, when i got the sub it was like 20 degrees outside, way too cold to make a box, i should have one built by the end of feb, or early march. its going in a 4th order.
also, the way i see it, the signal voltage does matter, i see it as a 4v out means i can turn my gains lower, which is less work for the amp, in my mind.
my old pioneer w/ 2v outs sounded like crap compared to my new pioneer w/ 4v outs, but maybe its the fact that my new one is alot higher end than my old one, i dont know.
and as far as the other 15", its a blown MA audio sub, this box was built for them back in the day, i was too lazy to pull it out, so i just left it.
and to the guy w/ a cherokee, man these things can rattle! i have like 5 layers of peal and seal on the hatch and the thing still rattles a bit. if things go to plan, this summer the jeep will see 2 SA-15s in a 6th order, with 3 layers of second skin on the entire cabin ontop of all of the peal and seal, so it should come out decently.
Anyways, longpost is long.