Sorry StanD, I don't understand your reply.
I want to improve the sound quality of my Android device by using a DAC/Amp, Isn't that what the A 200p is?
I assumed that since Idevice users use it to bypass their DACs it must be USB, am I wrong?
Beyer claim compatibility with Android
I mistook your question. Why not look for a review of the A200p or even better see if you can find one to try for yourself.
Many owners of the latest generation iPod Touch swear by the internal DAC and amp and feel that if the Touch can drive their headphones, they have no need of anything external. I don't know if that's quite true.