Ignore this person.I see we agree here..
on and think like kia if you change something in the car they don't have to back the warranty since you changed it..
I mean you put speakers in your car that need 90 watts
stock head unit 30 watts or so
equals a overload that at somepoint most likely will fry it..
kia won't give you another one... they don't have too you changed it which means you broke it
but if a cd stock in it.. they'd most likely have to fix that... but lol maybe they'd blame it on you..see where I'm going here
Worst case scenario when running 90wrms on a 30wrms channel is that you will distort your speakers at louder volumes.