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Just curious, how many variations have there been? |
yeah ,like the man says , seven
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Well actually, Pass Labs does not usually release their latest designs. They wait a few years before releasing previous designs. |
this was never a product but was a project in Audio eXpress Magazine.
Zen-first article ,SE Class A 10 W amp
Bride Of Zen-second article , SE mosfet preamp :roughly equivelant to the Aleph L
Return of Zen-update to the Zen ,small amount of feedback added
Son Of Zen -Balanced Version , a real heater
Bride Of son Of ZEN-Balanced Mosfet preamp :almost an Aleph P
All the above were projects and have pcbs available from Audio eXpress
the Aleph series were a commercial product of PASS Labs and once since retired the schematics are available at the commercial site in the service manuals section.
PASS DIY is an entirely different website that caters to the hobbyist and the ZEN has been updated and modified over time starting with the Zenlite until we get to the present version which is version number 7
these variations go all the way from a simple single ended single mosfet class A amp to pretty much a full blown aleph and now an "X" amp
choose your poison ,plenty of variations