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"ASH-400 Project" Sylph Audio FB-100 Stereo Module with advanced PFFB

somebodyelse

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But I don't know of any corresponding available modules.
In this regard, it would be great if you could name a few modules with the properties desired by @pjug .
I couldn't think of any either. The other requirement was dual rail supply, and the IRAUDAMP ones I mentioned were the only ones I remembered having that - but they miss on the post filter feedback as mentioned. Thinking again it seems some IcePower models might fit the bill. This post shows both 1200as2 and 300a2 being more or less load independent in frequency response, suggesting post-filter feedback. It looks like the 1200as1 and 2 are dual rail, but the lower power models are single rail. I'm not sure about Pascal - they have some load dependency, but I think less than the TI, so not sure whether they're using less feedback or just a different filter tuning.
 

Guddu

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@daniboun
If you don't mind this question - You have "advanced PFFB" in the thread headline, what do you mean by it? Is it different than others or TI's ref. PFFB design?
What is 'advanced' about this PFFB implementation?
 
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daniboun

daniboun

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@daniboun
If you don't mind this question - You have "advanced PFFB" in the thread headline, what do you mean by it? Is it different than others or TI's ref. PFFB design?
What is 'advanced' about this PFFB implementation?

Check here :

 
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daniboun

daniboun

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First measurements have been shared by Sylph Audio. We should get a few more db knowing that the below problem linked to this analyzer has been identified, check :


Source : How to measure amplifiers with Cosmos ADC

1710968387790.png



SMSL DL200 -> FB100 -> LPF without output coupling caps -> Cosmos ADCiso
PSU : LRS-350-36 adjusted to 38V DC


Impressive @5W/4R > we break the barrier of -106db Sinad

Left / Right channel

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brunes

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The case is biig as ran a dual mono...
 

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