Presonus HP4

Four Channel Headphone Amp

Order Code: HP4
Our Price: $249.00

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.

Photo of Presonus HP4 available from Factory Sound
  • Hp4
  • Hp4_front1
  • Hp4_front2
  • Hp4_rear


  • 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