I'm using a 3rd Gen Firestick into a Denon AVR-X4500H streaming Amazon HD with Ultra HD turned on. This really does sound good, significantly better than Spotify HD, however it will only do 192 kHz 16 bit, not 24 bit. Does anyone have any idea why?
As an aside, I really didn't expect the Ultra HD to make much improvement, but both my wife and I immediately noticed the difference between the Amazon 192/16 and the Spotify HD versions of the same album. We both feel the sound is "crisper" and can tell the instruments apart more clearly. Both streaming services are great, but the Amazon Ultra HD really sounds more like we are listening to live music. Having said that, individual albums are different. For some there doesn't seem to be much difference, for others it's quite pronounced.
As an aside, I really didn't expect the Ultra HD to make much improvement, but both my wife and I immediately noticed the difference between the Amazon 192/16 and the Spotify HD versions of the same album. We both feel the sound is "crisper" and can tell the instruments apart more clearly. Both streaming services are great, but the Amazon Ultra HD really sounds more like we are listening to live music. Having said that, individual albums are different. For some there doesn't seem to be much difference, for others it's quite pronounced.