Pro-Ject Head Box DS2 B Black Finish with Rosenut Wood Side Panels

From an online description:

The market for HiFi headphones has been expanding rapidly in the last years, with many new models and new driver designs. These headphones are able to produce outstanding sound, the amplifiers from which they are fed mostly are mediocre.

For example, planar-magnetic headphones demand more current and simply need more power to be driven to their full potential. Pro-Ject's new Head Box DS2 B will drive any headphone model with ease with a powerful 1100 mW into 33 Ohm output.

The DS2 B has three different current settings to match any headphone type and features four gain settings for high impedance headphones as well as sensitive in-ear monitors.

This fully balanced, dual-mono design is completed with a phase inverter to convert any unbalanced signal to a balanced one straight at the input. A balanced 4 Pin XLR output on the front guarantees perfect signal transmission to your headphone. The highly acclaimed Texas Instruments TPA6120A2 chip has been implemented for the best possible power handling, which results in superior sound and a near-dead silent noise floor. Both outputs on the front can be used simultaneously for shared listening experiences.