I was sloppy, it is a 8200cdq, and after some backtracking we think it is about 10 years old. Son is just back on leave from China and he inherited the previous preamp, between us our best guess is about 10 years. So part of my motivation was replacing before it failed. The sensible approach is probably to wait until it fails and upgrade. Have never confessed this previously, the hi fi is usually only switched on about once every couple of weeks, as in going to a concert. More fequently in the past few months. But not high milage!! Perhaps a factor?
Considerable effort ( and cash) went into building the speakers, so many might think it is a waste, but I only buy adequate cables☺
Oops, a thread diversion.....