This works great as a headphone amp. Balanced and unbalanced inputs, will drive most headphones to very loud level before distortion, good sound, dual power sources, and runs a long time on a couple of AA batteries.
In addition, I have found this useful for other purposes. Often I need to have a line level volume control, and this works great because of its multiple input and output connectors and battery power. It is also helpful when I need few dB of clean gain, or a way to go from a balanced to an unbalanced line. It adds no hum because it is battery powered.
One nit to pick: I wish the battery cover had a retainer so it's not so easily dropped or lost.
It's a well built and useful box that I would buy again.
I bought this thing in order to allow an assistant to hear what I was doing while mixing. It was a bit expensive, but the size, build and features seemed to be just right, so I went with it. I wasn't disappointed - it's heavy, but that's because it's made out of some sort of bulletproof unobtainium plating. It's battery powered, and the battery housing is easily accessible (no screws). It has XLR line inputs, which is perfect, as well as TRS ins, if that works for you. The three headphone outputs have independent level control, which is perfect for when everyone is wearing different models of headphone. Most of the headphone outputs are quarter-inch TRS, but there's a parallel minijack output so that you can plug some earphones in directly without needing any adapters.
All in all, it's a solid unit, and does the job perfectly. Just don't drop it on your foot!
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