
6-KT88's!!!! HOLY SMOKE! That has more balls than Donkey Kong and King Kong on a polka run in a tu-tu doing a slow dance to a waltz!
I had an amp w/ KT88's before, and wow... I too swapped to 6L6's too, the KT88 are way expensive. The ones I had in the amp were $190 for a pair. I did not know that at the time, if so, I would have hung on to them longer. There are less expensive ones out there, but tha what was in mine at the time.
And what a tone, BIG, HEAVY and so much Punch and bottom end.
(Sorry for the odd ball comment above, have not been to bed yet and loaded on 3 XL Timmy Hos' coffes

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