M2 is a beautiful amp and the x just makes it that much more fun! I have yet to build the M2x, just have the the teabag M2's.
I drove my 88db speakers with an F6. Around 6-8ohm load. Plenty loud and would be able to shake the pictures on the wall a bit. One recommendation I can make is to not skimp on getting multiple PCBs of different amps. You can swap them in the same UMS chassis with the same power supply.
There are also little boards that are pretty cool like SMPS filter, BA2018 etc.
Best of luck!
There are also little boards that are pretty cool like SMPS filter, BA2018 etc.
Best of luck!