Manufacturer Links
Egreat A11: http://www.egreatworld.com/egreat-a11-4k-uhd-hdr-blu-ray-navigation-hdd-media-player.html
Egreat A10: http://www.egreatworld.com/egreat-a10-4k-uhd-hdr-blu-ray-navigation-hdd-media-player.html
Egreat A5: http://www.egreatworld.com/egreat-a5-4k-uhd-hdr-blu-ray-navigation-hdd-media-player.html
Official Forums
Egreat A11: http://en.egreatworld.com/comunity/index.php?forums/a11-enthusiast-4k-uhd-hdr-blu-ray-hdd-media-player.37/
Egreat A10: http://en.egreatworld.com/comunity/index.php?forums/a10-enthusiast-4k-hdr-blu-ray-hdd-media-player.15/
Egreat A5: http://en.egreatworld.com/comunity/index.php?forums/a5-professional-4k-hdr-blu-ray-hdd-media-player.16/
Unofficial Forums
AVSForum [USA]: http://www.avsforum.com/forum/39-networking-media-servers-content-streaming/2751881-egreat-a5-a10-3d-4k-hdr-w-bd-menu.html
Homecinema-fr [FRANCE]: http://www.homecinema-fr.com/forum/multimedia-materiels-lecteurs-et-box/egreat-a5-a10-control4-hdr-iso-3d-bd-menu-t30077250.html