I bought this product to use live as a headphone amp for a wired in ear solution. I play drums and I originally had the Millennium headphone amp, but it was a little time consuming getting set up with a lot of cables. This seemed like the perfect solution according to the details...literally plug and play. What it doesn't tell you in the details is that you need an amp to run it. I thought this was the amp so all I'd have to do is plug a cable into the Aux out on the desk, into the 'amp', plug my earphones in and go. But when I tried it I only got a weak signal from one side. After chatting to a friend who used them, he explained that they need a power amp to run from. I have since reverted back to my old Millennium set up live, and I use this in the studio for practice and my interface provides the power to run it. Other than that, a great piece of kit for the price. Durable, small and robust.