Well , after over a year with my LAMMs, the LL1.1and 4x M2.2s, I wonder how any tube rolling on either would improve what I consider, humbly, a genuinely beguiling sound- any thoughts and sources of reliable tubes?
Jack recommended the Amperex 7308 for the M2.2's and I have to say its a wonderful an inexpensive upgrade. I noticed improved smoothness and a deeper sound stage.