Hi @@bignev Yes you are indeed correct, the headphones are infra-red fed from the bar along the top of the DVD 'housing' so the angles are a big tight if you're in the middle two seats you sometimes get audio break-up in certain positions. I've seen others have success with non-genuine infra-red headphones from other suppliers for different cars, etc, so that would suggest it's a common signal type, but I don't have any detail unfortunately.