But it would be fair to say that feedback before the output filter will reduce IMD woudn't it? Simply because you have one less unlinear factor in the feedback ( / mixer ) loop.
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Charles i am surprised that you don't already work in making class D amplifiers, because i think of you as one of the great capacities on this area. But i had satisfied myself with the explanation that you were working outside the audio business, where the money is bigger and the sun always shines 😉
