The PreSonus HP4 is a compact, high-output four-channel headphone amplifier designed to deliver loud, clear monitoring for studio and stage use. With simple controls, balanced I/O, and flexible routing, it’s an ideal solution for expanding headphone outputs without complexity.

Features:

• 4-channel headphone distribution amplifier
• 4 front-panel stereo ¼" headphone outputs delivering up to 130 mW per channel
• Individual headphone level control for each channel
• 2 balanced ¼" line inputs
• 2 balanced ¼" line outputs (monitor outputs)
• Headphone level control for each channel
• Mono summing switch for each channel
• Monitor level control with dedicated mute switch
• Daisy-chain multiple units via monitor outputs
• Compact 1/3U rack-mount chassis
• Sealed, detented metal rotary controls
• External 16 VAC power supply