Rewiring the car with heavier guage wire? I have some 5 1/2 sony explodes in the front dash of my 90 GC and some Lightning Audio 6x9's in the lift gate.

Also if if I wanted to add some speakers in the middle of the van on the sides, could I just tap into the wires going to the back of the van or would I have to run new wires?

 

You prolly wouldnt notice a difference if your re-wired your car.... You really shouldnt put another set of speakers on the head unit, but you can jst tap into the wires... I wouldnt do it, but you can.

 

yea rewiring really want make a diff and if you want to throw some speakers in the mid of your van id say buy a decent 4 channel amp and run ur 6x9s and mid speakers off that it would sound much better than just tapping into your head unit