Official Webpage AVR-X2300W | Powerful 7 channel AV receiver with WiFi, Bluetooth and 3D Sound | Denon WhatHiFi Review Denon AVR-X2300W review | What Hi-Fi? Just purchased this amp to go with my Sammy 4k Player. I was having a little problem with my Sony STR-860 playing ball soundwise with the K8500 and after installing this amp my sound issues have gone away. First time I have had such an expensive (for me) amp and the 5* review above clinched it. So easy to setup and sounds brilliant. Tried The Martian 4k and Mad Max 4k so far and they are beautiful. Even with my crappy mish mash of speakers. Particularly like the nice touches of the setup wizard going through everything right down to the cardboard tripod sound setup mic holder. I thought I had read somewhere this had a firmware update but I ran the update and checked the Denon website and there was nothing. Anyway share your thoughts.