its been a while since ive installed a system, but im gonna put one in for my friend probably next weekend. he has a 2002 grand prix gtp, and i forgot what wire do i hook the remote wire up to. his head unit is stock, so i know he needs to buy a little adapter for the rcas. and he also wants me to try and amp his door speakers...but he only has a one channel amp, so can i even amp his door speakers along with his subs?
no, you can't amp the speakers and subs on a mono amp together. you'll blow the speakers almost guaranteed. not to mention, the sub and the speakers play completely different frequency ranges. it'll sound like garbage.
hook the REM wire to a constant lead from the fuse box and put a switch on it. thats what most people do.