I just finished my 2nd Darling amp tonight, almost identical to my first Darling as you can see from the photo. Just like the first, this one sounds great too. Here is a photo of it being tested on a small pair of KLH speakers. Sorry for the messy workbench!
Unlike my first one, this one did not work at first.... I had no voltages coming out of the power transformer... who would have guessed a brand new on/off switch was not working! Then I had I a slight hum, I grounded the chassis to the negative rail, then I noticed the left channel was not working, oops, I was 1 pin off on the 12SL7 tube for the B+ resistor. All fixed within 30 minutes. Maybe I should get a good night sleep the next time I build an amplifier... Yellow_Light_Colorz_PDT_08
Sal