i just got the adapter that allows 5 1/4" speakers to mount to the rear door. my question is, whats the maximum mounting depth i'm allowed before the windows won't roll down? i've heard infinitys won't fit, so i'm looking at mounting depths less than 2".

this is the adapter that i bought:
http://www.mjmautoinnovations.com/sak4rt525.htm

thanks in advance!