Marantz HD-DAC1 headphone amp, preamp and DAC. Only selling this as I've recently bought a Mark Levinson integrated amp with an onboard DAC, and I'll use this to connect to an external headphone amp.

Some blurb from Marantz:

The HD-DAC1 is an ultra-high quality dedicated Headphone Amplifier, that creates simply amazing sound because it uses amplification technologies from Marantz’s high-end Premium 11 Series. The HD-DAC1 is so powerful, it can even drive audiophile high-impedance headphones of up to 600 ohm - with complete MODE ease. All thanks to its three-level gain control, Marantz HDAM-SA2 modules, a high current audiophile DAC (CS4398), and its Premium Quality fixed and variable RCA outputs.

It is so powerful, it not only drives headphones, you can also directly connect it to your Hi-Fi integrated amplifier or to a pair of active speakers or power amps. It’s also highly connectable. Optical and coaxial digital inputs as well as a USB-B port enable you to stream music directly from your PC or MAC. iDevices can also be connected via the USB port on the front. For even more connectivity we have also included an analogue input. The USB-B works in asynchronous mode to support not only 192 kHz / 24bits high-resolution audio but also the DSD 2.8MHz and 5.6MHz for maximized performance and the most direct way to enjoy excellent quality.

To safeguard quality when connected to a computer, we built extended isolation around the USB-B input to eliminate the chance of high frequency noise generated by the computer entering the HD-DAC1. We even included a jitter remover and Dual Clock for extreme accuracy. Without doubt, the HD-DAC1 is a feast for the ears. It also looks good. Info on volume, input, resolution, etc. is shown on the stylish Marantz Porthole Display. While the solid aluminium front is supported by a double layer bottom plate and retro-style side panels.