I have Pioneer vsx-3900s Audio Video Receiver and ordering some Sennheiser hd 600 and I'm wondering if i can use this receiver to power these headphones because I know that they need a amp because of there 300Ohm impedance but i cant find a specification on this stereo if this can power high impedance headphones out of the Phones port on the front, if anyone has any information on this it would be greatly appreciated.