Hifiman,
I have the Platinum-upgraded version of the DNA .05, but when I recently heard Don Sachs' KT 88 amp, I was flummoxed... it has vastly more three-dimensional sound, no question, and a potent LF response, that did not expect in comparison to the McCormack amp.
I ordered some NOS GE 5751 tubes to swap out for the stock 12AX7's to see if that tames the brightness I am perceiving. I have little room to move here other than swapping input tubes. It is quite a fine amp, but for the brightness I am hearing.
I have the Platinum-upgraded version of the DNA .05, but when I recently heard Don Sachs' KT 88 amp, I was flummoxed... it has vastly more three-dimensional sound, no question, and a potent LF response, that did not expect in comparison to the McCormack amp.
I ordered some NOS GE 5751 tubes to swap out for the stock 12AX7's to see if that tames the brightness I am perceiving. I have little room to move here other than swapping input tubes. It is quite a fine amp, but for the brightness I am hearing.