2. amps-preamps
  3. 1127956347

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.
128x128pookie10

Showing 1 response by vincentkkho

vincentkkho
53 posts
 
I don't think there is any optimum setting for the gain. It all depends on your speakers placement and the preamp that is coupled with it. The other factor to consider is the size of your room and the distance between the speaker and your listening position. Once all these are set, I would advise you to firstly set the volume control knob on your preamp to a predetermined setting. You will than go on to fine tune the gain setting in both MC-275. Try to play with the gain till you get the best result ( of course all depends on your ears). That is fun!
I would advise 12AX7 and 12AT7 to be used for all the small tubes. I did not have good result for 12AZ7, which was recommended by McIntosh before.
Hope it will help. Happy listening!
More to discover