Cheaper and better looking clone of the SPL 2Controller. Feels sturdy, well build and seems to be inaudible (passive) and even comes with an build-in D/A over USB when you'd occasionally want to plug in e.g. your laptop. Has a lot of features/flexibility (multiple inputs/outputs, mono/stereo, instant/temporary dimming of signal, adjustable headphone crossover). Highly recommended if you have multiple sets of speakers or working in a collaboration with multiple headphones.