Very Important Question about Sound System Upgrade.

[Falconeer]

Hi all, I am thinking of upgrading my sound system with Infinity or Pioneer speakers, but I do not want to change the head unit. Simply because I love the way it looks (I have the silver one from Toyota, that looks real nice).

1. I was wondering if I can get decent sound thru it or not?

2. What if I install a 5 ch. sub to go with this?

3. Will the factory system have outputs for this 5ch. amp in the back? Don''t think so!

4. How do I wire a sub without replacing the headunit? (this is a stupid one I know cause if I remember right, the amp will separate the bass signal).

I really don't want to re-wire the whole thing or change the head unit, but if the quality is going to be like what it is standard equipment, then I may have no choice.

I have wired and Mom's Mercedes with two subs and a 8 speakers on two subs and two batts with a bigger alternator. And my Honda Prelude ages ago... So I am kinda experienced. Just wanted some opinion.

What do you guys recommend?