Don Sach's pre amp

I have one. Beautiful preamp. I went for all of Don's upgrades (except for XLR).

Tube rolling makes a big difference.

I originally tried it with 4 x Psvane CV-181z Selects, but found the bass frequencies too 'muddy'. The sweet spot was 2 x CV181z's and 2 x chrome top Sylvania 6SN7's.

Is it possible to have them in full balanced configuration (not just XLR in)? Has anyone compared them to much more expensive preamp?

@radiohead99

Give Don Sachs a call. He's always willing to talk about his builds.

Ok
having heard Don’s amp at a friends house considering all other options at his price point I have decided to order his Don Sach’s model 2 pre amp in a Walnut case with remote control and all the bells and whistles

thank you all for your feed back and answers

I don't have one of Don's preamp, but he did a repair/upgrade on one of my old McIntosh C-20 tube preamps and Don's work was superb. He fixed an ongoing problem that I had taken the C-20 in to three other shops for repair.  Two of the shops were McIntosh authorized repair shops.
Don not only fixed it, but suggested a couple of additional upgrades and I now have a 50+ year old tube preamp that has measurably better specs than the published specs from original McIntosh sales literature.  
And the sound is fantastic!

Toolbox