I haven't had a chance to see what can be done in the Chally yet.
In the Ram SRT10 I put 4 Alpine 10" subs. Not even sure I want to do anything in the Chally. I installed the new lockpick and a couple cameras (front and rear).
I worked doing car audio for 12 years. Now I do homes. I once had 14 12's in a 1993 Mustang. That was fun.