Does PFFB apply to bass amps?

[gtirard]

I saw that video today, and I wonder if PFFB (post filter feedback) only concerns Hi-Fi amps or also bass amp?
And if so, do all class D amp use this technology, or only some of them, fully or partially?
Is it included in the power module (like ICE)?

Just curious…

 

[agedhorse]

Some do and some (or most) ICEPower modules do.