Bough NIB 950 XL and the sound is awful, known issue?

I bought a NIB 950 XL and the sound has just grossly poor. The audio seems like it has artifacts when playing music from Spotify or MyTube. I have no sound at all with Movies & TV. Clean install, so not sure what is wrong. Also, I thought the 950 XL had stereo speakers, which doesn't seem to be the case. Help