Can be, I know I would give 50/100hrs burn in time before I would really find fault here. Then it could be matching. I assume you have checked bias( I am not all that familiar with how to set up a BAT) as it could have changed. That being said, I know I can change the sound of my tube devices by changing out a couple of tubes. Like most things, it part of the reason that there are so amny out there.
Do new tubes undergo break-in like other devices?
I just put a new pair of Mullard Ecc34 (should be 6sn7s) tubes in the r/l inputs on my BAT VK60. These are the 2 most importants positions for BAT amps.
Part of it sounds wonderful...back of the soundstage, instrument separation, dynamics, articulation in the bass. Oh, and much queiter.
However, I don't think they have as much gain, I have to turn up the volume some on the preamp, and the bass is much lower vs the other parts. Kind of like a new power cord...needs time to open up. I can deal with the gain, not sure about the bass. This may just be a system matching thing, works great for some, not for me.
Is it break-in related?
Part of it sounds wonderful...back of the soundstage, instrument separation, dynamics, articulation in the bass. Oh, and much queiter.
However, I don't think they have as much gain, I have to turn up the volume some on the preamp, and the bass is much lower vs the other parts. Kind of like a new power cord...needs time to open up. I can deal with the gain, not sure about the bass. This may just be a system matching thing, works great for some, not for me.
Is it break-in related?