[Mr Rick]

You mean 17mW into 300 ohms. The power rating for the impedance is important to consider, not just the power rating alone.

The HD650s are 300 ohms, are they not?

 

[cel4145]

The HD650s are 300 ohms, are they not?

The clarification was mainly to assist the OP who might not realize that the distinction is important.

 

[Itbesandrodoe1]

i use mine for my a2+ plu speakers from audio engine and it makes them pretty stinking loud to the point where i think it might blow them, especially when the gain is on high!