Amplifiers:A Keeper for Life. Do you know of one ?

Atma-Sphere MA-2, a superb amplifier design that keeps getting better and better in it's MkII.2 and .3 iterations. Easily updated by the factory as significant design improvements occur.
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Atma-Sphere MA-2. Ralph Karsten is an outstanding, designer, manufacturer and human being. His amplifier and preamplifier designs are superb, and he's constantly finding new ways to improve the results he gets. Every improvement he creates can be implemented as an upgrade to any prior model, and with an upgrade to current factory spec comes a full new warranty. There are not many manufacturers out there taking care of their owners as are Ralph and Atma-Sphere.
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Oh, I take the "for life" literally. I’ve had my Atma-Sphere MA-2 power amps for 15 years and I expect them to stay a part of my system for as long as I have an audio system at this level. Someday I may downsize and no longer have a dedicated listening room, then things may change. But the change at that time will likely be for one of the smaller amps Ralph builds, not a different manufacturer’s amps.