Yamaha A-960II and high impedance headphones - questions

[201bk]

Hi guys, so I'm in a blind here. The manual says that headphones output is 82mV at 8 ohms and 7.64V at 100 ohms and nothing more but most headphones have rated power stated as mW not mV - so how do I understand this? Can someone help me a bit?

So far I've driven low impedance headphones on this amp (vintage Pioneer headphones from what I remember and they had like 8 ohms if I remember right!), 32 ohm headphones, 40 ohm headphones and 80 ohm headphones and it did seem to drive them all well. But right now I have my eyes on 150 ohm headphones and I started to wonder if it will be okay to use them with this amp.

Thanks in advance for replies!

 

[avionic]

so how do I understand this?

Ohms Law. Given voltage and resistance one can then calculate current and power.

 

[avionic]

7.64V / 100Ω = .0764A

.0764A X 7.64V = .5837W or 583.7mw

http://www.ohmslawcalculator.com/ohms-law-calculator

 

[avionic]

150Ω headphones would be easier on the headphone amplifier to drive than 100Ω

150Ω would run cooler at 389mw

 

[201bk]

Thanks! That's what I wanted to find out .