cakyol
You cannot accurately determine an amplifier’s current requirement by using calculations involving solely its audio output in watts and your rules-of-thumb. And why bother? The info you need is almost always on the back panel, the user manual and the spec sheet.
Huh?
That is why the factor of 2.5 was mentioned.... to account for differences in the class of the amplifier ...
The back panel measurement is done with a 1khz STEADY sine wave signal ...Nonsense. The current rating of any appliance is the current rating. I don’t care if you’re talking about a refrigerator, furnace, or audio amplifier. An audio amplifier is typically spec’d to include current draw at idle and maximum power.
You cannot accurately determine an amplifier’s current requirement by using calculations involving solely its audio output in watts and your rules-of-thumb. And why bother? The info you need is almost always on the back panel, the user manual and the spec sheet.