The S8 and LG V10 both sound fine in the same car. The S8 is also bluetooth 5.0 by the way. The V30 sounded fine with my Sony soundbar at home, and with a cheap battery powered bluetooth receiver. I guess it just didn't like my car for whatever reason. I ended up returning the V30. What kind of sucks is that I traded my S8 in for it and paid $240 to do the upgrade. So I am now using my old V10 that I had kept as a backup. It still works fine other than it needing a new battery (or two). I guess the big plus is that my monthly bill is now about $42 less a month since I'm not paying monthly on the S8 and I also cancelled my phone insurance since the V10 is old and not worth anything anyway. On another note, I swear that my car's stereo sounds even better with the V10 over bluetooth than the S8, but It could be all in my head.