50 A power amp? What kind of monster is that?


Hi folks, I've read that some power amps could deliver 50 A!! Well, that is the current for welding. You might need the capability of delivering such extremely high currents when you are using very low efficiency loudspeakers (let's say 87dB/W/m). Most of the energy will be sucked up by the crossover. My question is: when the amp is passing through 50 A of current, how can a speaker's crossover survive such a devastating energy boost?

Chris
dazzdax

Showing 1 response by aball

Yes well, the question is 50A for what amount time? For 100us? For 5s? My guess is the former - otherwise your breaker would trip. Also, speaker sensitivity isn't really its efficiency. Efficiency has to take impedance and its phase into account. A low impedance would draw much more current than a higher one. Sensitivity relates to volume - not current.