McCormack DNA 125

@nymarty - Very familiar with.  Swap out power supply capacitors, upgrade resistors to higher values is also a good idea.  You can also try V-Caps and I can let you hear amps that have them.   

@bigkidz Thanks.  Is this something that you do for people -- recapping and upgrading amps?   If yes, are you associated with SMC in any way?  Sorry if I'm reading this wrong and you just have experience getting amps serviced/upgraded at SMC.  It looked like in your first post that you were offering help to highend62, the original poster. 

@nymarty - I am not affiliated with smc in any way. My partner and I have been repairing upgrading rebuilding audio equipment for over 30 years. We have our own products. Google vujadeaudio  peter

Sorry, can't comment on the DNA-125 but I owned both the DNA-1 and DNA 0.5 about ten years ago and for some dumb reason sold them.  I few years ago I got lucky and picked up a DNA-1 on eBay. I'll not sell this one.

I have used the DNA-1 on Raidhos and it is very good, but possibly a better match for a slightly cooler speaker. The sound was good but I use a W4S STI-1000 instead as the W4S provides better clarity and detail and has a great hold on the bass.    I really like the DNA-1.0 on my Martin Logan SL3 electrostats.

I cannot imagine you'd be disappointed with the amp. Good luck.

There's a few McCormack pieces on usaudiomart right now, FWIW. no affiliation.