Hi there long time reader of this forum but this is my first post. I just purchased an LG 55 4k tv and an LG 4k bluray player, I want to connect through my Sony strdh 750 I am having issues with the 4k playback when using the amp . I am not getting 4k when using the amp for dts HD or true HD the picture on the tv changes to 1080p, the reason I bought the Sony amp previously was because I knew I would subsequently upgrade my equipment to 4k uhd. I have everything connected as per the instructions, is there anyone could point me in the right direction in baffled by this, Thanks for taking the time to read this