I'm sure this is nothing new but I love the sound system. I came from a Bose powered Maxima (which sounded really good) and the infinity system blows it away. When I first test drove the car I was not impressed with the sound. It turned out that the dealership did not have the "surround" feature turned on. Turning it on completely transformed the sound quality. It is definitely the best I have heard on a stock system. Pair that with the HD radio function and the quality is hard to beat. I almost always stream music so I don't get much use out of the HD radio but when I use it there is a huge improvement over the regular radio sound.
Reason for post- If you dont have surround on, Turn it on.
KIA doesn't know how to sell this car. At the Toronto 2015 car show they only had 1 on display (base unit) and no SD chip in it so the sound system was disabled. When I got mine home I was fiddling with the set up because I thought the sound system sounded flat and there was only base and treble adjustment and then I turned on the surround option and BOOM what a difference! You can crank this baby up and there are no rattles or shakes just great sound - one of the best features of the car. KIA should make this a default setting.
The clarity of this system is considerably better than my optima sx's infinity system...but the optima had a lot more punch from the woofer. I had to install an infinity sub all in one deal in the trunk to get more low end. I'm kind of surprised I don't hear that as a regular quibble, but I might just be a lil bass heavy in my taste...