Update--
So 30 hours of straight play from the Music Hall Class A Mambo, and I swapped in the Primaluna HP Integrated, running KT 150s and reissue Gold Lion 12au7s (I have enough NOS 12au7s to last 100 years, and I think these are almost comparable to NOS, almost).
Holy cannoli! This is nuts how holographic and gorgeous this sounds.
So 30 hours of straight play from the Music Hall Class A Mambo, and I swapped in the Primaluna HP Integrated, running KT 150s and reissue Gold Lion 12au7s (I have enough NOS 12au7s to last 100 years, and I think these are almost comparable to NOS, almost).
Holy cannoli! This is nuts how holographic and gorgeous this sounds.