I was talking to a Scion rep. @ the Seattle auto show last night while checking out the new RS 4. It has a stock stereo, but sounded better than mine. The rep showed me a sweet little trick...if you hold down the SSP button for about 3 seconds a new menu will pop up. It allows you to scroll through 3 different tuning settings designed specifically for each scion car type (xA, xb, tC). Since Scion puts the same stereo in all their cars they have this system to acoustically tweak it to match each body style. He said most dealers don't know about this trick. I tried it and sure enough mine was set for a tC. As soon as I adjusted it I noticed the difference. The bass is much deeper & the all around sound is much richer. You do have to re-adjust the bass & treble settings again, but man, does it sound better. Just thought I'd share this little trick, I've never heard or seen a thread about this.