why zero global negative feedback amplifier not observed in pass designs?

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The one and only
Joined 2001
Paid Member
You realize that I have numerous designs using ZGNFB, going back to
the Stasis amps at Threshold. At Pass Labs ZGNFB was applied to the
early X amplifiers - X1000, X600, X350. With the X250 we applied GNFB
and have used it in the X amplifiers since.

At First Watt, the F1, F2, M2, F4, SIT-1, SIT-2, and SIT-3 are all zero GNFB.
The other amplifiers have global feedback loops.

The decision to employ loop feedback around the output stage has always
been based on whether that particular amplifier sounded better that way.

:)
 
music soothes the savage beast
Joined 2004
Paid Member
You realize that I have numerous designs using ZGNFB, going back to
the Stasis amps at Threshold. At Pass Labs ZGNFB was applied to the
early X amplifiers - X1000, X600, X350. With the X250 we applied GNFB
and have used it in the X amplifiers since.

At First Watt, the F1, F2, M2, F4, SIT-1, SIT-2, and SIT-3 are all zero GNFB.
The other amplifiers have global feedback loops.

The decision to employ loop feedback around the output stage has always
been based on whether that particular amplifier sounded better that way.

:)
I don't think he realize it. Otherwise he would not ask the master zero gnfb amplifiers such a question.
He typically starts the thread and then leaves...
 
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This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.