Scion tC Stock Audio System?

I also have a 2007 Scion tC, and when I listen to MP3 data disks with SRT on, I generally don't have the b any higher than 3 or 4, and I will crank the volume up to 35-40. On a normal audio CD, I will crank the b to 5, and take the volume up to 40 or so. It sounds okay. I also have my SSP set on 'feel', and the car type set for 'xA'. The audio sounds crappy (to me) with the car type set for 'tC'. If you haven't played around with the car type settings...try it! Hope that helps.