I've gone through a fair bit of stuff, but i'll see how my memory goes.
My old mazda 626
tape deck, stock 4"
Bro's old clarion headunit
pioneer 4" 2ways front
commodore factory 6" rears
then i added a tiny amp on the rears, cause it was given to me, like, 100watt peak
headunit blew up (smoke came out of it)
got a panisonic mp3 player headunit (had 4 rca's), ran a supercheap 800W amp, got my bros old super cheap sub, 12" in a sealed box, gave me some base finally.
bought a kicker 12", liked it, bought another one, sealed box fitted in with 2 12" sounded ok, super cheap amp was crap
bought my bros 4channel x 60rms coustic amp. put in kenwood 6x9's in customer mdf parcel shelf, they went hard.
ran subs of 2 channels of coustic, 6x9's of other.
got a commodore. swapped everything into it.
got my audio bahn 8000T to run my subs. (monoblock 800rms @2ohm), now i had 6x9s in rear, factory berlina splits in front run off the coustic amp, and my 2 kicker subs off the monoblock.
was happy with this for a while, i decided i would replace the subs when they blew up, so i pushed them hard, but the things never died.
got some kicker splits from jb, finally some decent front stage. tuned everything again, was happy once again.
by this stage my whole system owed me just under a grand, and it was going waaaay better then mates system who had spent heaps more.
Got my current commodore, swapped everything again.
btw, I had being running everything off single 8guage till now
ran a 2nd 8 guage, one for each amp, its what i had, didnt want to buy 4 guage if i had 2x lengths of 8 guage, no point. put it all in, cept this time i kept stock 6"'s in rear, 6x9's no point anyway
scored a new headunit, my current deh pioneer thing, yey, 6xrca's, but a heap of other adjustments, basically a swap, cause a car was being sold, so we relieved it of its audio gear.
got some spare money
bought 2xkicker cvr's dvc @2ohm in a ported box. (400rms each)
spent a weekend with younger bro, wagenz, modding the box to fit in. seemed to be the best i could do to match my amp without spending huge money, got them 20% off at jb, $420 for the pair and box
new subs go way louder then old subs, sold old subs.
now i'm trying to learn how to tune ported system, its very different, and i listen to alot of styles of music, from rock to pop to dance to metal to whatever, so yea, its being a challenge.
never done a sound off, just always enjoyed having my rock songs kick me in the back with each bass drum hit.
had a weird delay on the subs, no idea, as in some songs, such as intial d techno stuff had the kick late. I got new battery termianls and upgraded earths and alternator and all that to 4 guage, off cuts hanging round the shed, and it seems to have fixed the problem.
for the moment happy with my system, apart from the tuning, still working on that.
i need some sound deadening like, everywhere, but meh, too much other stuff to do.
btw enjoyed reading about you guys systems