I've been living with a low level hum with my Classic for the past year that I've owned it. It hasn't bothered me too much but I decided that I wanted to get rid of it once and for all, so I just bought a used pair of Cardas Golden Reference interconnects (double-shielded) and that should do the trick. When I get them I'll post the results. Meanwhile I've been using a pair of Gabriel Gold Extreme II. I temporarily stuck a pair of cheap video cables on there to see if that got rid of the hum (like VPI recommends in the owner's manual), and indeed it did. So, at least in my case, the hum is caused by poorly shielded interconnects.
