What are some of your settings on your Sport stereo? I listen to only rock music and have tried many setting combinations to see how it sounds. I think the following settings sound really nice! Smooth tends to add alot more treble and more vocals...so I dropped the treble a bit. Not a bad sounding stereo for a stock unit!

SMOOTH - Bass +2 and Treble C

 

after market headunit helped so much.. sure factory radio is clean.. but nothing like adjustability of aftermarket.. i know i know.. that wasn't the question.. but consider if you want signif improvement w/ stock speaks.. just need the headunit.. that is only if you don't play your music loud..

 

Mine is
beats
bass +2
treb -2
Svc hi
plus the little bass tube

 

Normal or Beats
bass +1/+2 (depends on song)
treble 0
SVC medium

 

Fronts -2 because you can crank that bitch up more! I use beats and 0-0 treb/bass. I think! lol car in the shop. I can't go out and look.

 

Oh I know...the aftermarkets do sound alot better. I have one in my other car. But I really like the look of the dash with the stock unit. I rarely go above 20 anyways.

Oh yeah...and I have SVC on high.