It is not necessary to provide a single dedicated 15A circuit for three M200's if they are being used as intended (home theater / music amplification) because of diversity: you will never drive all three amps to full output at once. You may in fact never drive any of them to that point individually. Now if you are using them to run some sort of air raid siren or driving tactile transducers with a constant signal for a shaker table or something bizarre like that, we might be looking at a different scenario...

An extension of this logic: the Model 770 provides 200W per channel for seven channels, yet the nameplate rating is 1800W - exactly the same as the Model 755, which has the same 200W per channel for only five channels, and exactly 15A worth of load on a 120V system. Add to this the fact that people can and do operate a 770 on the same circuit as other electronics (pre/pro, source devices, TV, subwoofer amp). This is possible because many electronics (particularly amplifiers, but also components like PC power supplies or transformers) never draw their nameplate rating in normal use.

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