I hope that you can help. I have an AVR-2803 and have recently purchased QED Airloc speaker cables. The problem being that having attached them to the speakers with no trouble at all, they do not seem to connect at all. Reading other posts, it suggests that due to EU regulations a small plastic insert is preventing me from inserting which either needs to be prised out or forced in, but on trying this the insert seems not for moving and I am wary of wrecking the amp without being absolutely sure of what i am doing. Any advice would be appreciated.