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Offline Martin Colloms  
#1 Posted : 25 July 2020 11:41:20(UTC)
Martin Colloms


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The sound of amplifier loop negative feedback

This has been a pet subject of mine for 30 years or more. Greatly generalising,
there have been sufficient examples to modestly correlate the sound of increasing
negative feedback with reduced sound quality.

Highlighting the issue is the Delétraz pre-power,the subject of a feature review
in the coming edition of HIFICRITIC, exploring the product of a designer
with nothing short of an obsession for avoiding loop negative feedback.

If ever I wished to hear an example of this idea fully expressed in a transistor design, this is it.

'SE triode sound on steroids’ one listener opined

Martin Colloms
Offline en1omb  
#2 Posted : 28 July 2020 18:30:39(UTC)
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Some interesting insights into the Dartzeel design here:
https://www.monoandstere...18ns-story-by-herve.html
Offline en1omb  
#3 Posted : 12 August 2020 10:08:21(UTC)
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The pre amp is getting a lot of love over on Mono and Stereo, so I am really looking forward to your take on it.

Edited by user 12 August 2020 10:09:07(UTC)  | Reason: Not specified

Offline Togil  
#4 Posted : 13 August 2020 07:19:29(UTC)
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What about a review of one of those amplifiers that use a more advanced method of correction , eg Soulution ?
Hans
Offline en1omb  
#5 Posted : 13 August 2020 10:01:21(UTC)
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Yes, Bruno Putzeys has the totally opposite approach:

https://www.audioholics....lifier-negative-feedback

His latest implementation appears in the NAD masters M33
https://purifi-audio.com/
https://nadelectronics.c...streaming-dac-amplifier/
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