My car stereo doesn't have BT so I got myself a Kinivo BTC450. Which by the way is awesome. Anyway, I noticed that the sound is absolutely fantastic, compared the direct AUX connection. I usually listen to di.fm in the car and the free membership gives you a lower quality but with that thing I actually have .... Bass .... Other songs I have sound also amazing using the BT adapter. So not sure why, or if I am making this up (old ears and all that), but it is great. Anyone else noticed that?