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By the way, something I haven’t seen – although it might well exist – is a scientific/engineering rationale in support of passive RIAA equalization. On its face it seems like another exercise in doing it the hard way, when by using a series NFB loop one neatly disposes of the initial gain and equalization requirements in one fell swoop.
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I haven't seen any proper argument in its favour, just unsubstantiated statements by pundits.
It's odd that feedback volume controls like the little Cambridge Audio amps are seen as laudable and their effects on dynamic range, noise and headroom are trumpeted.
But the same advantages of applying RIAA equalisation in a feedback network are pooh-poohed.
We aren't in Kansas anymore!
David