I am installing a subwoofer soon and am wondering if anyone has considered upgrading to an aftermarket amp for the other stock speakers to make the system "brighter"?? Is this an easy upgrade and will it not interfere with the Nav system or warranty??

 

not possible with out changing the complete system out i heard of Jl cleansweep which works good to clean a lil of the system up but the upgrading amp for stock speakers i heard is very complicated