Matt,
Let me first say that the burn in time was kindof a joke. I have had plenty of gear that needed significant break in time to settle down. This amp is NOT one of those. If nothing had changed from initial plug in, i would still be quite happy so, out of the box, it was terrific! The additional hours have simply revealed a more "luxurious" presentation. My experience may not be applicable to your situation due to the fact that about 400 hours in is when I swapped in the Mullards. I do believe the amp has gotten more dynamic and snappy. The only ones I saw were silver face w/chrome knobs....mine is the black face w/gold knobs.
Let me first say that the burn in time was kindof a joke. I have had plenty of gear that needed significant break in time to settle down. This amp is NOT one of those. If nothing had changed from initial plug in, i would still be quite happy so, out of the box, it was terrific! The additional hours have simply revealed a more "luxurious" presentation. My experience may not be applicable to your situation due to the fact that about 400 hours in is when I swapped in the Mullards. I do believe the amp has gotten more dynamic and snappy. The only ones I saw were silver face w/chrome knobs....mine is the black face w/gold knobs.