I have gone back to using a National Union 7n7 in the input position of my KT88 Firebottle. And I'm now running a pair of 6ar6 for the output tubes. I think this is my favorite combo so far. It has the warmth of the Firenti 807 tubes but seem to have better bass control. It's a thicker sound and I'm digging it.
Think this'll be end of my tube rolling for a while with the amp. My new preamp will be coming next week and I'll be rotating a variety of tubes through that lol. I have some adapters coming so I can use my 6c5 tubes but I think I'll wait to try this once I get a feel for how the preamp affects everything. The new preamp from Dennis looks amazing and I might have ordered it but I had out in an order for a Supratek preamp months and months ago. I'll still keep tabs on this thread, always looking for more info.
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