PreSonus HP4 4-Channel Headphone Amp
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!
Features:
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
Specifications:
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 kohm
- 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: 51ohm
- 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, 60ohm load
- Frequency Response: 20 Hz – 20 kHz, +/-0.5 dB, 60ohm load
- Headphone Impedance Working Range: 32ohm – 600ohm
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)
