Yeah I installed a remote starter in my truck and its pretty sweet, especially when its cold, have yet to try it when its hot. Only gotten over 80 a few times down here.
There are isolater systems that use 2 batteries. One for the stereo and another for the engine starter and basic systems and the stereo battery doesn't kick on until the engine is putting out the 14 volts.
I actually got my speaker amp because the owner thought it was blown. Turns out the fuse was only burnt and so it hadn't worked in over 5 years. FYI, the amp is so old the line was discontinued in 1994 and this thing is still working nicely.
