Profile: Presonus Audio Electronics offers mixers, recording systems, monitoring & controllers, preamplifiers, signal processors and accessories. HP60 is the flexible headphone mixing system available for professional and project recording studios as well as live sound in-ear monitoring systems. Loaded with six independent, loud and clear headphone amplifiers, it features dual stereo inputs & external input, for each channel allowing to mix between three stereo audio streams (mix A, mix B, and external input). Stereo output is also available on each channel to send line level headphone channel mixes to additional headphone amplifiers or monitor systems. Each channel features headphone level, mix control between A and B inputs, external input volume, mute and mono. This also features talkback via external XLR microphone input.