Hi!

I have 03 Accord V6 EX Sedan. I got my system installed last month, Boston ProSeries 6.5 components in the front, Boston Rally RM9 6x9 for rear with JL 450/4 amp, no sub. Still keep stock deck. This JL amp and every other JL amp has built-inhigh/low converters as well as crossovers, so you don't need to add them separately.

I am sure that our stock deck doen not have any pre-out as most of other OEM decks. My system sounds is pretty nice. Of course, it is the best if you can replace the OEM deck. You can add an aftermarket deck (have to throw out the cover cd lid), and the sound will be a bit clearer and stronger. But, you still have to keep OEM deck for AC/Vent and alarm because they can't work all together at once (now stock cd deck can be used for cd storage). That's why I decided to keep stock deck which is nice and neat.