Recently changed the caps in my amp to Audyn True Copper Max from those cheap Green Russian PIO ones.

This brought about much improved detail but at the expense of some sharpness in the top.

I've been diligently waiting for the caps to burn in but today unplugged the amp from the wall, flipped the wall socket switch a few times, plugged it back in and...

Voila, the sharpness is gone WTF?

I've decided to buy some unswitched socket to replace mine and may pull the switch on some silver plated ones.

I can't beleive the difference this has made as I was about to drop the old PIOs back in...

Got me thinking about what else I could do to improve the mains.