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Power delivery into difficult headphones

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Paul Joppa:
I suspect that there is some confusion in the marketplace among volts, watts, and impedance. Four volts at 60 ohms is about a quarter of a watt, but into 4 ohms it's 4 watts. So a rating of 4 watts or more is a minimum specification if you are using a speaker power amp, even though you are actually using only 1/4 of a watt.

Loquah:

--- Quote from: Paul Joppa on September 01, 2021, 04:46:13 AM ---I suspect that there is some confusion in the marketplace among volts, watts, and impedance. Four volts at 60 ohms is about a quarter of a watt, but into 4 ohms it's 4 watts. So a rating of 4 watts or more is a minimum specification if you are using a speaker power amp, even though you are actually using only 1/4 of a watt.

--- End quote ---

I wondered about this too, Paul. Thanks

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