The headphones are slightly delayed from the TV audio and causes a noticeable delay. This is only when plugged into the cable box RCA audio jacks. When plugged into the TV headphone jack it works fine, however this method causes the TV speakers to be cut out and I do not want that to happen. What we use them for is to have one person wearing them (because they are a little deaf and would require the TV volume to be too loud) and they can set their headphone volume to their liking, while the other viewers can listen directly to the TV speakers at a more reasonable volume. However, the problem is that the person wearing the headphones can still hear the TV speakers a bit, but it is slightly ahead of the headphone volume and creates an 'echo' and is unpleasant. Also the headphone volume is not synced to the speakers lips. How can I eliminate this delay? We have tried changing to all three of the channels but that did not help. Thanks.

Sony Headphone model MDR-IF245RK Sony blu-ray model BDP-S6200 & LG TV model UB9800

I need headphones for grandpa theat enable him to listen to tv without subjecting the rest of the family to the high tv volume.