My 106 is quite old, I bought it new pretty soon after it came out, and it was scratchy from about day 14 onto now. My PSR-500 was bought used, barely, and was scratchy a few days after I bought it. The 106 has literally thousands of hours of use on it, and it's still working fine, just scratchy. The 106 is slowly catching up. I won't bother fixing them until/unless the pots actually fail. It would be nice to find a better replacement though..