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RE: Atma-sphere M-50 history

Not for sale, but here are a couple of pics.









May not be a better condition pair still in existence. Mine are #150.

I was told they were upgraded to M-60 Mk1 status many years ago, but I have never actually confirmed that (Ralph - do you have any record of the upgrade).

This does have a circuit board.

I upgraded the caps to VCap. Interestingly enough, the amps when I received them were absolutely identical (as far as I could tell) except for the original caps - there were different values in each amp for some reason.

Ralph is right about the switches - on one amp they work OK (after spraying with cleaner) but the other has issues (still useable but with a lot of effort).

Other than that, they seem to work perfectly and are very stable (and sound great).

The only other issue I can find is that one of the "Power Available" LEDs is starting to dim (they are more than 20 years old after all).

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