I have a Mayflower Electronics O2 amp+ODAC with the rear power input - I also got the nice, machined volume knob. This is not the newer rev B. No visible wear/damage, smoke-free household. Includes power adapter and usb cable. $185 shipped.
If you have good headphones and are looking for high quality sound on your PC, this is the best bang for you buck.
If you have good headphones and are looking for high quality sound on your PC, this is the best bang for you buck.