The amps are great if you get by this quirk.admin wrote: ↑Sun Oct 16, 2022 5:21 pm In all honesty, I think the experimentation with the LP275M's is pretty much complete. I don't really think there is anything else at this point. As you mentioned, the solution is to have them connected to a common power strip. There is only so much you can do with ground loops. I've had them in my system before as well, and you do the best you can, often finding a solution, but deviating from the solution will bring back the problem.
This doesn't detract from the LP275M's in my opinion, it's just a inherent property to that particular amp. Different components have their requirements, limitations, positive qualities, etc...
Believe me, I was not happy in 2018 when I first installed them. My power was two dedicated 20 amp circuits on the same ground bar of the breaker box. This set up had been feeding big Krell class A amps, dead quietly, for a couple of years with no power drama.
I installed the LP275Ms, and was immediately confronted with hum on both sides.
After a multi day kabuki dance to find the issue, I called CJ.
Without any head scratching, the explanation that the whole organic system behaves as one entity and that if all the devices weren’t on the same plug, the whole thing would be one giant antenna.
I knew this advice should not be necessary, but took it anyway just to be able to say I did in future discussions.
Lo and behold, it solved the problem.
Problem repeated in three other buildings over the intervening years. Solution always works.
CJ says PLCs and Regenerators cause more problems.
I am happily listening to music … that is as it should be. The next wrangling I do with the LP275Ms will be to box them up.