SPL 2 Control

This lets you mix with headphones correctly. Two people can also hear the mix control their own volume.

Compact and user-friendly, the SPL 2Control gives you complete control of your DAW's monitoring functions. Whether you're listening through studio monitors or through headphones, the 2Control's high-quality speaker volume potentiometer and active circuitry ensure that you hear every nuance of your mix. Headphone monitoring through the 2Control is incredibly accurate thanks to its Crossfeed control, which lets you adjust your stereo panorama so that it corresponds to a stereo speaker image, rather than to the 180-degree panorama that headphones typically provide