Calling all MC275 MK IV owners..............


I just set up my new MC275 and although the tubes have about 90 minutes on them, I'm blown away by the sound - I wish I discovered tubes 10 years ago.

Anyway, a few questions:

1. What gain level do I set the amp to. I cranked it all the way up but is there an "optimum setting?" I'm running these in stereo mode with unbalanced connections.

2. In a couple of days another MC275 gets delivered and I plan to run them in mono mode also using unbalanced connections. What gain setting is optimal for that configuration?

3. I have the amps on a trigger switch and noticed that on power up the tubes sort of glows a bit brighter for a second then settles back into the normal orange filament glow. is this normal?

4. What is tube rolling?

Thanks for all your help. I really appreciate it. Sorry if these questions are a bit stupid.
pookie10

Showing 1 response by tomryan

Don't worry about tube on tube getting fuzzy or hazy. I've been running like that for years and years and with the right equipment, get magnificent music making. Just last night I was listening to a Gene Ammons CD which sounded open, clear, and as if the band was right in the room. And this with a tube pre-amp, SET tube amp, and I am sure the original recording was done with all tube studio equipment.

Both tube and SS stuff nowadays (and going back a few years) can make beautiful music. There are tube designs which can sound a but fuzzy and hazy (older C-J stuff) and designs that can sound crystal clear and almost over-lit (Some OTLs). You have to check out each piece on its own merit.