I can not comment on 3D or Dolby ability to say, but for me it works FullHD including sound without interference or delay with two 20m HDMI cables (redirect = true & ref_ = oh_aui_detailpage_o06_s00) and 2m networking cables in between. Was previously only in test mode, but I am completely satisfied and I assume that even a longer network cable between the transmitters should not make much difference - and I have my solution for 45m that I need. Oh and I have between the source and the first 20m HDMI NEN 8 times splitter (redirect = true & ref_ = oh_aui_detailpage_o00_s00), who was connected with NEM 1.5m HDMI cable to the source (KD receiver).