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Do consider Nelson Pass's all-class-A and all-JFET J2 amp

Posted by jeffreybehr (A) on February 14, 2016 at 14:40:35

In Reply to: 845 SET vs 25 Watt Class A Sugden Amp? posted by cawson@onetel.com on February 8, 2016 at 11:32:33:

I have a pair (currently for sale) that I used and loved with my 97dB Serenity Super-7s.


But I wanted more power for my 87dB-(in)sensitive Avanti-IIIs and bought a c-j ET250S that uses 6DJ8s in its frontend. It, too, sounds excellent with the S7s.

With Pass's approval and instructions, I wired the two channels of each of mine in parallel. Max-power rating changed from 25WPC into 8 and 13WPC into 4 to 25 Watts per chassis into 8 and 50 watts per chassis into 4.


Mine are slightly improved; e-mail me at jeffreybehr(at)cox(dot)net if you want more info.

FWIW, I've had SETs based on 805s (Antique Sound Lab Explorers), 845s (again, ASLs), 300Bs (Coincident Frankenstein IIs, the worst of the bunch), and 13EM7s (Roger Mojeski's), and I'm finished fooling with amps that use vacuumtube output stages.

• The J2   (Open in New Window)

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