Here is a terrific piece of audio gear. The Musical Fidelity M1 HPAP headphone amplifier.
This is an "open" box unit, may have been taken out to show or demo once, then put back in.
It has 2 aux inputs and a usb digital input, it doubles as a preamp too, has pre amp out.
so you get 2 units for the price of one.
Class A design with high current low noise power supply, makes any headphone sound better.
Guaranteed to work right out of the box.
shipping 25.00 to lower 48