AUDIO & VIDEO QUALITY
It seems that my Nikon D3300 doesn't like taking pictures of my new 55 inch 4k TV in total darkness (everything is blue even with the color temperature set to neutral) but since i was unable to grab screenshots directly from the player i thought I’d post them regardless. Now you may not be able to check the quality of the movies used (we have converted several blu-rays to H.265 HEVC MKV including Star Trek Beyond, Ghost In The Shell, Batman VS Superman and Guardians Of The Galaxy 2) but leaving out a couple of glitches while watching one of these movies via USB 2.0 (yes you can enjoy heavy bitrate 4k movies even via USB) the rest where reproduced from an 3.5" internal drive without a single issue. Detail is practically incredible (as expected from H.265 HEVC MKV files with bitrates exceeding 70Mb/s) both in terms of video (crisp with vibrant colors) and audio (clarity) while playback is smooth as if you're reproducing a regular Full HD file. Unfortunately my somewhat outdated 5.1 and 7.1 surround sound systems doesn't support Dolby Atmos (eventually i must upgrade to one) but the Duo 4k is perfectly capable of reproducing it.