I can tell you that Don Sach's equipment is like nothing I have ever heard and is hard to believe that you get this level of sound/build quality at the asking price. I've owned lots of tube equipment, and this is the best I've heard regardless of price. I own Don's combo, DS-2 Tube Pre and his Kootenay 120 KT88 Amp, Walnut wood and love it...
Remember, this is customized equipment and Don has a waiting list that could take up to 3+ months since he builds them one at time...
https://www.audiocircle.com/index.php?topic=138092.0
Wig