Xti16
The tubes were right out of the box, it could be the input tubes you were using may not be a good match for the KT-120. I just heard the V110 today with the KT-150 tube, again the results were spectacular. We used the Gold Lion 12AT-7, but preferred the Gold Lion 12AU-7 with the Gold Lion 12AX-7. I never cared for the Tele or Mullards or any of the NOS tubes in the Octave components, I prefer the wider bandwidth of the current Gold Lions.
Btselect
The tubes were right out of the box, it could be the input tubes you were using may not be a good match for the KT-120. I just heard the V110 today with the KT-150 tube, again the results were spectacular. We used the Gold Lion 12AT-7, but preferred the Gold Lion 12AU-7 with the Gold Lion 12AX-7. I never cared for the Tele or Mullards or any of the NOS tubes in the Octave components, I prefer the wider bandwidth of the current Gold Lions.
Btselect