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Old 20th July 2006, 01:02 PM   #1
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Default Zv9 as preamp?

Hi,
Even though it seems I won't find time to try:

Shouldn't the Zen v. 9 make a nice preamp when substituting the power-fet with a famous 2sk170 and readjusting the currents & voltages?

Signalwise, it would be a purist SE-approach, and even the output-cap wouldn't hurt that much since it's inside the fb-loop.

The potential issue I can see is limited output current/highish output impedance.

I might have been tried by someone, cause it seems so obvious, doesn't it?
Rüidger
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Old 20th July 2006, 07:34 PM   #2
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Interestingly, I have played with this, and I found that cascoded
JFETs in a diff pair arrangement somewhat like the BOSOZ was
superior to a single JFET sonically, much as BOSOZ was better
liked than the BOZ.
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Old 20th July 2006, 07:44 PM   #3
steenoe is offline steenoe  Denmark
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Quote:
Interestingly, I have played with this, and I found that cascoded
The quote thing wont let me quote the whole thing This is pretty interesting, any chance to see a new Zen preamp with J-fets?? I would love to build a thing like that

Steen
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Old 20th July 2006, 08:03 PM   #4
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I think we could do that.
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Old 20th July 2006, 08:10 PM   #5
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by Nelson Pass
I think we could do that.

why I'm not surprised?
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Old 20th July 2006, 08:16 PM   #6
steenoe is offline steenoe  Denmark
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Quote:
I think we could do that.
Wow, thats great. Cant wait to see it Thanks a lot for responding
A new chapter in the Zen preamp history, who would have thought that? I was afraid that the statement "this pretty much finishes the preamp offerings in the Zen series" was gonna hold!!
Thanks a lot for reconsidering!


Steen (quite happy )
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Old 20th July 2006, 08:32 PM   #7
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by steenoe
Wow, thats great. Cant wait to see it Thanks a lot for responding
A new chapter in the Zen preamp history, who would have thought that? I was afraid that the statement "this pretty much finishes the preamp offerings in the Zen series" was gonna hold!!
Thanks a lot for reconsidering!


Steen (quite happy )

I don't wanna be rude-but why not susy then?

susy or blowtorch or whatever-they seems all are along the pretty similar line (except susy approach )

just for illustration-thinking of little ZM about these ideas......nothing new under the sun.....from other deviant thread



http://www.diyaudio.com/forums/attac...amp=1151491647


btw-I like boundaries and tasks stated from Papa....
he sometimes show almost psychotic urge to please the children
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Old 20th July 2006, 08:39 PM   #8
steenoe is offline steenoe  Denmark
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Quote:
I don't wanna be rude-but why not susy then?
Choky, a little of your own medicine Anyone said it wouldnt be a susy?? Anyone said anything at all?? I am sure that Mr. Pass wont let us down. If we really gets a successor to the BoZ or BosoZ, I am sure it will be better than those

Steen (confident )
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Old 20th July 2006, 08:45 PM   #9
Zen Mod is offline Zen Mod  Serbia
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I like twisted confirmations from Papa,sometimes even more twisted than I understand,but why he must do everything?
I mean -he does it already ....?
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Old 20th July 2006, 09:04 PM   #10
steenoe is offline steenoe  Denmark
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Quote:
I like twisted confirmations from Papa,sometimes even more twisted than I understand,but why he must do everything?
Hey thats easy to understand This is the Pass forum!! Loads of us guys around here knows Mr. Pass from the past!! Personally I know his amps way back from the late 70'es
Allways, allways was Mr. Pass's amp's superior! I have listened to loads of amp's, but the best are Pass's amps! I heard the Treshold A400 and 4000's and they were the greatest at their time!
Mr. Pass is "God" on this forum Just in case you missed it

Steen
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