PreSonus is shipping the HP60 ($399) 6-channel headphone mixing system. It has six independent low-noise, high output headphone amplifiers (150mW per channel) and features dual stereo inputs with balanced TRS connectors, as well as external input for each channel, allowing users 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. The HP60 also features talkback via external XLR microphone input.