I've decided to bite the bullet and replace my perfectly good Kenwood AV receiver with something that doesn't suffer from the Norman Collier effect when listening to a DD5.1 encoded movie from my Sky+ box using the Sky optical out. I know the amps to suffer the most are Denons and Kenwoods, but I've heard of forum members with Sonys that have also suffered the same problem. Sky do not seem interested in finding a solution to this problem, so if I want to make the most of my movie subscription by being able to listen to the films in DD5.1, I'm going to have to replace my amp. If you have your AV receiver or amp connected to your Sky box using the digital optical out, and you have your Sky digital out set to DD rather than Normal, can you post your amp's make and model number, and whether it successfully decodes Sky's half-hearted attempt at Dolby Digital 5.1 or not? This problem only occurs on Sky's own DD encoding, Dolby Digital on Disney Cinemagic (and on BBC HD, National Geographic HD etc) seem to work fine on most amps. There is no need to post if you only have Sky connected to your amp using the red and white stereo cables, or you have your digital out set to Normal rather than DD, or your amp set to stereo or Pro-Logic rather than Dolby Digital, because my amp works fine in all these instances. It is only if you use an optical cable and have the output set to Dolby Digital that this is relevant. Hopefully this will give me some pointers as to what amps/receivers to go for, and which ones to avoid. To start the ball rolling: Kenwood KRF X9050D - does not decode Sky DD correctly.