I use a 6' cable AVR > Darblet and a 3' Redmere cable Darblet > Display. No problems what so ever....I was using a 3 ft HDMI cable. When switched with a 6 ft, perfection. Never use a 3 ft HDMI cable. It is not only the Darbee that can have problems with a 3 footer, a lot of electronics can have the same effect. I no longer use a 3 ft HDMI cable.