A versatile and powerful headphone amp for tracking. The PreSonus HP60 is among the most flexible and advanced headphone amplifier systems 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, the rackmountable HP60 features dual stereo inputs as well as external input, for each channel allowing you 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. A common set up for the Presonus HP60 Headphone Amplifier in a recording session is to send the main control room mix to input A. Send the click track to input B. Send each band member the direct output of their recording channel from the DAW to the external input of their headphone channel in the HP60 (more me). This will allow each band member to create a mix between the main mix, the click track, and themselves. PreSonus HP60 6-Channel Headphone Amplifier Features: Six independent ultra low noise, high output headphone amplifiers (150 mW per channel) Two sets of stereo inputs (A and B) with balanced TRS connectors Stereo external input point on each channel for "more me" with trim control Mix control between inputs A and B Talkback with external XLR microphone with control Direct stereo line output on each channel PreSonus HP60 6-Channel Headphone Amplifier Specifications: Input A: (2) 1/4" TRS balanced 10 Ohms Input B: (2) 1/4" TRS balanced 10 Ohms External input: TRS stereo unbalanced 10 Ohms Headphone amplifier output power: 150 mW RMS (60 Ohms) per channel Audio outputs: 1/4" TRS stereo unbalanced per channel Master controls: Talk button, Talkback volume, Input A, Input B Channel controls: Headphone level, Mix A/B control, External input level, Mono, Mute External talkback: XLR with TS external control jack Power: IEC 110V-240V internal switching Dimensions: 1U - 19"(W) X 1.75" (H) X 5.5"