120V/15A=1800W. Add enough capacitance to the power supply and you can have brief instances of more power. Add a big trani and it will store some power in the the form of magnetic fields.
These are very short term and limited resources beyond the 1800W coming in. Given that linear (not switching class D) amps are usually 50%-75% efficient, the amp is limited to 900W-1300W max in ideal conditions for sustained power output. A 20A circuit improves this another 25%. A 220V/30A circuit might be able to help an amp produce a sustained 5000W into small loads, maybe (4000W is probably the real world limit). And all that assumes some fairly high mass Robust Heat sinking, and high current caps, because 4000W is cooking.
Measurements are only as good as the specifications for those measurements thmeselves. Given a brief enough measurement period, the power output could appear to be almost infinite into a short circuit.
These are very short term and limited resources beyond the 1800W coming in. Given that linear (not switching class D) amps are usually 50%-75% efficient, the amp is limited to 900W-1300W max in ideal conditions for sustained power output. A 20A circuit improves this another 25%. A 220V/30A circuit might be able to help an amp produce a sustained 5000W into small loads, maybe (4000W is probably the real world limit). And all that assumes some fairly high mass Robust Heat sinking, and high current caps, because 4000W is cooking.
Measurements are only as good as the specifications for those measurements thmeselves. Given a brief enough measurement period, the power output could appear to be almost infinite into a short circuit.