subs

I just bought a 2005 chevy tahoe and I tried to wire up two 10" jbl 1000watt subs in parallel with an Autotek m4000 amp. I've got a little experience wiring subs and I've wired my own in a 2000 impala but I wired these ones and they do not work, the owner before me wired up a touch screen...

So we have played around with a few different set ups in the hoe now bandpass ported not ported 12's 10's ect.... But hubby still hasnt found the right one. So I want to know what everyone else has in their own hoe. And the more details the better cause right now we got a bunch of speaker stuff...