Hi Bryon,
Assuming that "noise" is interpreted broadly, to include distortion and perhaps also DC offset, the only other things I can think of would be:
1)Dynamic fluctuations in voltage resulting from resistance in the AC wiring, as current demands fluctuate with the music.
2)Wiring inductance possibly limiting how quickly the supply of current can change, in response to abrupt changes in demand.
I don't have any particular quantitative feel for how much significance those factors may have, if any, and I suspect that in many cases they will be of no significance. Particularly if the power amp is Class A, and hence draws essentially constant current all the time. But those are the only other possible factors that occur to me.
Best,
-- Al
Assuming that "noise" is interpreted broadly, to include distortion and perhaps also DC offset, the only other things I can think of would be:
1)Dynamic fluctuations in voltage resulting from resistance in the AC wiring, as current demands fluctuate with the music.
2)Wiring inductance possibly limiting how quickly the supply of current can change, in response to abrupt changes in demand.
I don't have any particular quantitative feel for how much significance those factors may have, if any, and I suspect that in many cases they will be of no significance. Particularly if the power amp is Class A, and hence draws essentially constant current all the time. But those are the only other possible factors that occur to me.
Best,
-- Al