I'm on a HK980 currently as well.
What improvements exactly gave the reduction of R6/R7? I've adjusted C2 and C5 because they seem to be way off of what would be appropriate in their respective place. C5 now is 1000u/6V3 and C2 is 2u2 MKS.
What improvements exactly gave the reduction of R6/R7? I've adjusted C2 and C5 because they seem to be way off of what would be appropriate in their respective place. C5 now is 1000u/6V3 and C2 is 2u2 MKS.
The nested feedback I suggested is to improve bass 'control/impact' but you have to do all the changes, not just some random components, or your amp will probably go up in smoke. I would not change values on other caps, I think they are fine.