If Papa has plans for an output stage, we could let him take over.
I am not sure what further involvement Nelson might have been planning.
I am not sure what further involvement Nelson might have been planning.
Well it's not just about heat dissipation it's getting decent grunt from the output stage.
Even if it was Class AB I would still probably do 8 devices per channel.
V8 Baby.
Hahahahaha
Actually I guess it's more like a Porsche Flat 8.
Even if it was Class AB I would still probably do 8 devices per channel.
V8 Baby.
Hahahahaha
Actually I guess it's more like a Porsche Flat 8.
Thanks pico, I was thinking along the line of the Class AB S200 output stage - so not as much heat, so 8 devices will be doable I suppose.
I think Nelson will be leaving the output stage up to us, as there were so many different Threshold circuits including the series (cascoded) ones in the SA models. Nelson's FE pcb caters for both.
Maybe the Stasis guru ZM would have a suggested output stage.
I think Nelson will be leaving the output stage up to us, as there were so many different Threshold circuits including the series (cascoded) ones in the SA models. Nelson's FE pcb caters for both.
Maybe the Stasis guru ZM would have a suggested output stage.
well, as I see it, Pa already gave everything needed in post #1, speaking of schmtcs
pcb itself is another issue
addendum - I did saw Stasis amp just once in my life, and it was not powered
so , you can call me a Guru of Non-Guru-ness

pcb itself is another issue
addendum - I did saw Stasis amp just once in my life, and it was not powered
so , you can call me a Guru of Non-Guru-ness

Thanks ZM, so now is the time to build an updated Threshold classic - Nelson will be proud of you. definitely on my to do list for 2021.
Maybe Nelson can enlighten us on the OS he used to test the pcb as shown in the photo's in post #1.
Maybe Nelson can enlighten us on the OS he used to test the pcb as shown in the photo's in post #1.
Last edited:
I didn't see where he mounted source resistors.
So either he is good at hiding them or he has been messing around with zero degen.
So either he is good at hiding them or he has been messing around with zero degen.
No pico, emitter resistors, we are going BJT here not Fets - they would have been all wired up under the heatsink I would say.
That's right pico, old school going back 35 years or so to the good old days. Mr Pass will remember them well.
ZM makes my life much easier.
![]()
ZM must be the honorary consul.
ZM must be the honorary consul.
life-long Adoptee Candidate, constantly ignored and forever in disgrace

Is that true ZM, hell it seems you would eat anything then - it is an acquired taste, especially if you were not brought up with it as a child. 🙄
Zen Mod ate Papa's jar of Vegemite and Papa called the adoption off.
So he should, damn near a hangable offense.
Public flogging first
Then put in the stocks for a day
Then hanging
Like the good old days
Hahahaaha
Then put in the stocks for a day
Then hanging
Like the good old days
Hahahaaha
- Home
- Amplifiers
- Pass Labs
- New Stasis front end