I have had to change all my coaxial to optical as one by one my coaxial inputs have just stopped. I have emailed Haydon - don't get me started on their service, but have had no reply. Anybody else had this problem? The sound would just cut out, and then it just got worse and worse. I reassigned them and then one by one they all don't work. I think if memory serves there are 3 on the AVC-A1SE. It is the un modded version. Optical are working fine at least for now. Yes, I have changed leads using both QED and Kimber, but it is not the cables. It was a straw I grasped as I cannot imagine what could go wrong with them, especially with good quality cables.