Re: what tubes for peavey valve king?
That amp only has the ability to use 6L6's in it's present state. The cost to mod it would not be worth it. When I had one, I improved the overall tone considerably by using TAD 6L6STR's(Warm, huge bottom end, smooth) and running various NOS 12at7's in all of the preamps positions. The 12at7's cut the buzziness that the 12ax7's added when pushing the gain, yet the gain was still substantial. The only other thing that I feel is a must change on this amp was the speaker. I ran a Vintage 30 and it was head and shoulders above the stock peavey one.