PreSonus HP4 4-Channel Headphone Amplifier

PA SKU # PSN HP4 MFR # HP4 UPC # 673454000423
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  • Product Highlights
  • 4 Discreet Headphone Outputs
  • 2 Balanced 1/4" Line Inputs
  • 4 Stereo 1/4" Headphone Outputs
  • 2 Balanced 1/4" Line Outputs
  • Volume Pots for Each Channel
  • Wide Frequency Response
  • Daisy-Chainable

4-Channel Headphone Distribution Amplifier

Now Hear This!
Are you and your session players and bandmates tired of straining to hear underpowered headphones? We were too. That's why Jim Odom and his jambalaya-fueled team of engineers designed 150 mW headphone amps for the HP4 headphone-distribution system. These 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. Be careful with that level control!

As with other Max Rack products, simplicity is the hallmark of the 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.

Like other processors in our Max Rack series, the 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.

So listen up! Quit struggling with mediocre headphone amps. Get the HP4 and hear everything loud and clear. You owe it to your music.
  • Input/Output
  • 4 screaming-loud (150 mW per channel) stereo 1/4" headphone outputs (front panel)
  • 2 balanced 1/4" line outputs (monitor outputs)
  • 2 balanced 1/4" line inputs
  • Meters, Controls, and Features
  • Headphone level control for each channel
  • Mono summing switch for each channel
  • Monitor level control
  • Monitor mute switch
  • Daisy-chain multiple units via monitor outputs
  • Physical
  • Compact 1/3U rack-mount chassis
  • Sealed, detented, metal rotary controls
  • External 16 VAC power supply
  • Inputs
  • Connector Type: 1/4" TRS, balanced
  • THD+N: 0.0025%, 1 kHz, unity gain
  • Max Input Level: +18 dBu, <0.5% THD+N, unity gain
  • Input Impedance: 10 kΩ
  • Frequency Response: 20 Hz - 20 kHz, ±0.5dB
  • Monitor Outputs
  • Connector Type: 1/4" TRS, asymmetrical, impedance-balanced
  • THD+N: 0.0025%, 1 kHz, unity gain
  • Max Output Level: +18 dBu, <0.5% THD+N
  • Output Impedance: 51Ω
  • Frequency Response: 20 Hz - 20 kHz, ±0.5dB
  • Headphone Outputs
  • Connector Type: 1/4" TRS, stereo
  • Max Output Power: 130 mW/Ch., <0.5% THD+N, 60Ω load
  • Frequency Response: 20 Hz - 20 kHz, ±0.5 dB, 60Ω load
  • Headphone Impedance Working Range: 32Ω - 600Ω
  • Power
  • External Adapter Type: +12 VDC, 1000 mA, center pin positive
  • Physical
  • Dimensions: 1/3U rack-mount (with standard rack tray, not included)
  • Height: 1.75" (44.45 mm)
  • Depth: 5.5" (139.7 mm)
  • Width: 5.5" (139.7 mm)
  • Weight: 5 lbs (2.27 kg)
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