This thread is from a while ago that shows my 10 Tube setup that drive my M2s + 2X EP400s audio only system.

The MC-100B is quite a brawny setup that weighs 60+ Lbs largely due to the four hefty power supply canisters. It is a dual mono design for genuine 2 channel separation. Sounds wonderful & heats my house at this time of year, ha!

Pics start on page 3 although some are lost in the ether somewhere:

The latest MC-100B Amazon (US) listing is double what I paid a few years ago: