Atma-sphere 3.0 to 3.1


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.
pubul57

Showing 10 responses by pubul57

Seems like there is no choice really. Do you have any idea what changes are made? I assume some passive parts, and....
Hi Tvad. I suspect posting the question here is asking Ralph, and others can get the answer at the same time:)
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.
Ralph, what did you do my M60 amps? Sounds like I have a subwoofer!!!! I've never the acoustic bass sound so good, so present, and with such scale coming from my tiny 6 1/2" woofers. The upgrade, whatever it was, was well worth it.
I have not, but I have been listening to passives and they are great with the right amp. I think the Atma-spheres are not ideal for an external passive, but I suspect that with Ralph building it into the unit customized for the specific load and sensitivity of the amp and no ICs that it is great, of course you loose a bit of flexibility compared to an standalone preamp. Would love to A/B a MP1 versus the integrated passive volume control.
Ralph, does that mean it is best to have a source with lower gain so that you can turn the passive up further (less attentuation) - as long as it plays loud enough? By the way, how much does it cost to "upgrade" a pair of M60s with volume controls? Guess I should have thought of that when I upgrade to 3.1:)
That is good input (no pun intended) on output voltage. My CD player puts out 2v or 3.6v with a switch, and of course I can listen at the 12-2 position with the lower gain. Will you ever be demoing the "integrated" at a show (RMAF?).