this is not how it works... but ok.
You would still need 112dB to get 82dBA at 50Hz
And with a crest factor of 12dB this would be 124dB peak need to give you distortion free music at 82dBA RMS from 50-20000Hz
I am of the opinion that bass might not be ideal to talk about in terms of crest factor(?)
It is more like “It draws what it draws” and the “The draw is intermittent on/off”.
At least that is how I think about it.
But that is more of a concept I apply to say rap or some hip-hoppy music, and not to say an upright bass.
And in a related way…
If it is playing music with a crest factor of say 13 dB, then that is 20x. So the peaks would be at say 100W and the RMS power would be at 5W.How can a "38V/4A=152W" PSU power a 2x125W amp? Even if it's custom made for music playing purpose, this seems a bit low. The PA3s has a "26V/5.75A=149W" PSU which is basically the same output in watts, but the PA3 is not nearly as powerful.
Since the 5W < 150W, then all is fine.
If it is being channeled to a subwoofer which trying to send 40 or 50 Hz out then it could do 100W for a while, and gradually the capacitors would start sagging in voltage, and the output starts dropping to the 76W leve… or lower.