Headphone amp - voltage vs current

[Bel Canto]

I'm hoping someone can explain this to me in layman's terms.

How would one know if a headphone amp puts out good current to drive a lower impedance headphone. I sort of understand that for higher impedance cans like say a HD650 at 300ohms, lots of voltage is required to create the power to drive them. Looking at the tests, this roughly translates to around a few hundred mw at a guess.

What I'm not sure about is what indicates an amp has good current for something like a Dan Clarke 12 ohm headphone?

Thank you and be gentle on the uninformed

 

[amirm]

You would have to have measurements like I show. Otherwise you will not know as manufacturer specs are routinely inflated.

 

[Bel Canto]

You would have to have measurements like I show. Otherwise you will not know as manufacturer specs are routinely inflated.

Thank you, May I ask which of the measurements would give an indication of current delivery?

 

[Merkurio]

Thank you, May I ask which of the measurements would give an indication of current delivery?

Basically, the power delivery at low impedances (50 or 32 ohms in most of Amir’s amplifier reviews).

An amplifier that puts, let’s say, 2 watts at 32 ohms, indicates high current flow at that given load, just like 200 mW at 300 ohms shows you a high voltage delivery.

Ohm’s law in a nutshell.

 

[Pendel]

Divide # watts by # ohms, and then take the square root to find the current (# amps). [For example, 2 watts into 32 ohms corresponds to 1/4 amp of current.]

Multiply # watts by # ohms, and then take the square root to find the voltage (# volts), or alternatively multiply the # amps by the # ohms. [For example, 200 mW (0.2 watts) into 300 ohms corresponds to just under 8 volts.]