Well, I must say, it sounds excellent when turned all the way up and connected to my Mac with a 1/8" to RCA.
Incredible, really.
I have something going on though, there is a pretty audible buzz in between everything but the lowest and the highest range of the gain knob.
Identical in both channels, so it is not a left right deal.
I used 12 volt AC for the heaters, Tom never has any problem with that.
I went through with and pushed on connections, moved groups of wires (with a plastic probe that I have), I was not able to make a single difference in the sound?
I don't have any deoxit, but I am using an old spare 100k pot, I guess it could be that, but I dunno. I have never had a Darling hum, ever.
Let me know what you think. I am stoked to get this finished, the sound quality on full gain is really good.