That headphone output makes me nervous, with the possibility of getting a foot tangled up in the cable. But, it works OK. Used it today, since I forgot to take my interface box, which to my hearing sounds better. But, that box is one more thing to plug-up, with accompanying wires and cable. Mine is not USB powered. There’s enough clutter now, with the laptop, powered speakers, mixer, guitar, with effects pedal, vocal mic, with stand and TC Helicon pedal. What else? Stool to sit on, speaker stands, stand for the laptop. And, wires everywhere. There must be a simpler way.