Presonus HP4

Four Channel Headphone Amp

Our price:$279.99 GST
Order Code: HP4

IN STOCK 2 (more can be backordered)

Small, but nonetheless very well developed the HP4 headphone amp is designed for home studios, listening labs and more. The 15 sec tour: L & R inputs on back, 4 x 1/4″ stereo headphone outputs with individual volume pots on front, PLUS a ‘monitor level’ pot on the front. This can be used for control room monitors. Very handy.

L & R outputs on rear can feed studio monitors, (mono mute switches on front) or to loop through to more HP4 units.

Check out the Presonus range at Factory Sound here.


  • 4 loud (150 mW per channel) stereo ¼” headphone outputs (front panel)
  • 2 balanced ¼” line outputs (monitor outputs)
  • 2 balanced ¼” 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


  • Compact 1/3U rack-mount chassis
  • Sealed, detented, metal rotary controls
  • External 16 VAC power supply


Connector Type XLR- ¼” TS, Combo, 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  ¼” 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  ¼” 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


External Adapter Type +12 VDC, 1000 mA, center pin positive


Dimensions 1/3U rack-mount (with standard rack tray, not included)
Height 44.45 mm
Depth 139.7 mm
Width 139.7 mm
Weight 2.27 kg