My system really thumped when I first picked the car up. It was great for the first few days. Then I connected it to my home WiFi and it updated to 48.12. Now it's neutered. Hopefully they fix it soon. I don't think it has to do with the input - I played around with a lot of different sources before the update, and now after the update all of those sources sound "blah." I didn't make note of what system it was running before the update, unfortunately. Wish I had.