[PHC1]

Originally Posted by djwhog

My cans drive amazingly easy and sound fantastic with the following upgraded headphone amp.

Woo Audio WA-6SE with Sophia Princess & matched pair of 6GL7/6EM tubes

Look at the Woo Balanced amps too, very nice with upgraded tubes and plenty of power to drive anything I have seen, even the demanding HD800s.
WAWA22 is almost the same as my WA63 but is all one unit rather than a separate power supply, and has balanced inputs and outputs.