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Presonus HP4 Headphone Amplifier

  • Product Description
  • Product Video
  • Product Accessories
  • Warranty
Presonus HP4 headphone amps are not just loud enough for session and stage use, they're loud enough to explode the oysters in a Po' Boy sandwich. Yet the sound is clear and clean, with a wide dynamic range. At last, everybody will be able to hear - assuming they are capable of hearing.

As with other Max Rack products, simplicity is the hallmark of the Presonus HP4. You get left and right line inputs, left and right line outputs with level control, and the four headphone outs. You can globally mute the headphone outs, adjust the overall headphone level, and sum the stereo signals to mono. Presonus HP4 can sit on a tabletop or can be mounted in 1/3 rackspace, using the optional 3UMR rack adapter. And if your needs grow, you can use the line outputs to feed the inputs of a second HP4 or an HP60. Chain as many headphone systems as you need.

  • 4 screaming-loud (150 mW per channel) headphone amplifiers, each with:
    • Headphone level control
    • Mono summing switch
  • Monitor level control
  • Monitor mute switch
  • Daisy-chain multiple units via monitor outputs
  • Input/Output
    • 2 balanced 1/4" line inputs
    • 4 stereo 1/4" headphone outputs (on front panel)
    • 2 balanced 1/4" line outputs (monitor outputs)
  • Physical
    • Compact 1/3U rack-mount chassis
    • External 16 VAC power supply
    • Optional 3UMR rack adapter
TRS Impedance 10K Ohms
Panel Controls
Headphone Level 1 to 12
Monitor / Feed Output -80dB to +10dB
Mono Switch  
Monitor / Feed Mute  
Power Supply
Type Linear
Input 16VAC/1000mA (factory configured)
TRS Balanced 51 Ohms Impedance
THD+Noise (Unweighted) 0.002%
Noise Floor -98dB
Signal To Noise >95dB
Power Supply Rejection >98dB
Power 16 Watts
Weight 5lbs.
Dimensions 5.5 x 5.5 x 1.75
Mounting Max Rack and Universal Rack Tray
Chassis Steel
Panel Brushed Aluminum
Sides Cast Aluminum
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Presonus warrants its products to be free from defects for 1 year from the date of purchase.