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Mike, thanks, but...

I can't see much on that graph. Most importantly, neither set of labels on the axes are discernible (to me on my 14" laptop screen). Anyway, an impedance of 3.2 ohms at low frequency is not good news. But I have no experience trying to drive any comparable speaker with an Atma-sphere amp. Surely, all would be well with the use of the Zero Autoformers, set to increase impedance seen by the amp by a factor of 2X. The Zeros are quite transparent; I use them myself in driving Sound Lab ESLs.


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