Using all pre-outs vs just one

[OtisWallace]

Can someone give me the explanation (because im curious) as to the benifit of using all 6 pre-outs (2 Fr, 2 Rear, 2 sub) vs just using one set of inputs (say front if it has a full sound spectrum) and then just letting your dsp use that signal to process power all channels? Does using all 6 reduce noise? Increase SQ? Allow for use of faders front and rear?

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