out go the nasty little chinese valves bundled with the Fatman
In go some tasty little Russian numbers...
6N1P-EV Gold Grid OTK Plant NOS Matched Pair.....
They're only just warming up now, but I have to say, they are a fair step up already....
Muddy Waters Folk Singer got first spin and the presentation, esp. in a near field setting is far more believable, no extra octaves in the bass register! but a touch more control, yummy!