SF is always a different animal that is a known tube eater.Often it is a matter of what will survive. The Amperex is a sweeter airy tube but the Siemens has great extension and a undistorted clear strong signal that make it a holy grail.
Sonic Frontier power 2 6922 tube swapping
Would there be any advantage in replacing the Siemens 6922 tubes with Amperex PQ white label tubes in my Sonic Frontier power 2 amp? The unit has the Siemens tubes that Chris recommends with the SE update.
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