Hi. I was researching cables, specifically the newer Canare offerings. When reading reviews, one writer claimed a huge improvement when inserting a ferrite bead on the interface cable. What I know (little) about ferrite beads is that they alter the characteristic impedance of the cable (75 Ohms)and may be counterproductive. However, since this was so easy to try i did. Two things; the sound improved and the strange distortion that was affecting my Luxman T-117 was gone. So, bottom line, I need a new, well shielded cable. It seems, and I'm not sure why, my IDock is very noisy at it's output. Is it in need of service? Thanks! Rpg