Yes, thanks, it's where I scammed the headunit idea.

I'm not a car audiophile, but I am trying to learn. The headunit controlling the main speakers by its own amplifiers and/or outputs plus a woofer output would seems to be two good solutions. I just really want to know what other people are using and what results they are achieving. I am also looking for people to point out weaknesses in my plans.

I especially want to know about the temperature issues.