Has anyone else done the upgrade from 3.0 to 3.1 - I have M60s of very recent vintage with power and vcap upgrades. It does not seem expensive. I do wonder what the changes are internally and how the perfomance changes, improves? with the upgrade.
Is that class A A/B switch on the M60 3.0? If it is, I never saw it before. I did have the power regulation upgraded 1-2 years ago, so I wonder if my unit would see much changed in the PS.
These were originally Mk 2.3 that had been back in the 18 to 24 month window for upgrade to 3.0. They are MA-1's as well. I do not know the history of the Class A/AB switch on the various models. The upgrade from version 3.0 to 3.0 was significant according to Ralph and the amps confirmed that upon their return. Just do it.;-)
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