The stereo in the S2000 hasn't been updated since the car's launch. Its single CD slot doesn't play MP3 CDs, nor is there an auxiliary input jack or any way of plugging in an iPod. Fortunately, it's a standard single DIN head unit and can be replaced.
The S2000 sports the most unique remote audio controls of any car on the left side of its dashboard. These controls are convenient to use and mirror the A/C controls on the right side.