I have an Aleph 0s with which I have been satsified for 10 years. The Aleph 3 is a little lower power with 2 gain stages instead of 3, and is reputed to sound more tube like, but it delivers a little less current into low impedances. the aleph 30 is a later version of the 3, I believe, but it is not as ruggedly built and should sell for considerably less. You should be able to find all the details on the passlabs website.
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