Bel Canto Dac 3

 Yes that is true of the Dac 3. It’s alittle harsh. I am now, as of yesterday running it through an AVA Fet Valve CFR Preamp. And that has made a huge difference. The upgrades/mods through 3 parties aren’t cheap. Bel Canto doesn’t have any upgrades for this anymore.   

Buy a new or newer one. There are so many for sale here I am sure you will find one to your liking. 

FWIW, I found the DAC 3.0VB to be a big step up in sound quality over the non-VB version -- I got to demo both in my system a while back.  While I'd be happy to have the VB in my system, with all the developments over the past few years I'd probably try something like the Metrum Hex DAC available here now for $1250.  Best of luck. 

But I can’t emphasize enough how much dirty electricity makes digital etch worse. To combat this, I use a power isolator into a conditioner into my Electronics

Are you talking stray DC current? I pretty much have that covered...