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.

@radiohead99

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