Hi Richard,
I just bought and received a Hagerman FryKleaner Pro burnin device. The kit was $85 and the parts ordered from Mouser cost another $75 or so. I haven't soldered it all up yet, but should have it done this weekend.
I have a Graham Slee Era Gold mkV + GS Elevator EXP "transformerless" stepup to burn in along with the rest of my system - cables, IC's, TVC, new speaker x-overs, dac, and speker drivers. The whole sheebang.
Luckily, you can hook up everything as one long continuous chain and burn them all in at the same time. If I leave off the speakers, then the rest can be hooked back into the FryKleaner for one continuous loop, speeding things up.
I asked Jim Hagerman how long it takes to burn interconnects, power cords, speaker cables, and preamps?
He responded:
"Usually about 40-50 hours on a FryK. The amps are fastest and get most of the way overnight. Silver wire takes about twice as long as copper."
So, the $150 for this unit is well worth it in my case. I really don't want to run my system at high volume for days(or weeks) to break in things. I'm not sure my neighbors would enjoy that.