For those of you who asked about tube rolling - I have had a One for 2 months now and have changed out the EL34's, the 12AX7's and the 12AU7's, trying various combinations. They all make a meaningful, and readily apparent change in the sound of this unit - you really can tune it quite easily to get the sound you would like. I'm sure this would work for the Two as well.
My suggestion for those of you with limited tube experience - before you get caught up in buying expensive NOS tubes do some research on the tube types and the sound attributed to the various current production brands. Its a cheap way of getting some valuable experience - eventually you can move on to some NOS stuff but I think some of you will be surprised at how good these units can sound with good quality new production tubes. Audio Asylum's tube forum is a good source of info as is Job's Tube Lore in the AA FAQ's.
My suggestion for those of you with limited tube experience - before you get caught up in buying expensive NOS tubes do some research on the tube types and the sound attributed to the various current production brands. Its a cheap way of getting some valuable experience - eventually you can move on to some NOS stuff but I think some of you will be surprised at how good these units can sound with good quality new production tubes. Audio Asylum's tube forum is a good source of info as is Job's Tube Lore in the AA FAQ's.