My car stereo has an auxiliary input. I hooked up my Clip+ this morning, and was disappointed in the quality. Not awful, but very inferior to what I’m used to from MP3 CDs played on the same stereo. I tried it with volume at full and half. Even at full volume, I had to turn up the volume on the stereo quite a bit beyond normal. With the Clip+ at half volume, I had to turn the stereo almost to full volume.