PreSonus HP4 120 W Blue 4-Channel Headphone Amplifier

The PreSonus HP4 is a professional 4-channel headphone amplifier designed for studio monitoring, live sound, and broadcast applications. With 130 mW per channel into 60 ohms, it delivers clean, powerful audio to up to four pairs of headphones. The all-metal chassis ensures durability, while the compact desktop form factor (1/3U rackmountable with optional adapter) saves space. Each channel features an independent volume control, and the master section includes a mono/stereo switch and mute switch for flexible monitoring. Balanced line inputs and outputs allow daisy-chaining multiple units for larger setups.

Advantages

High-quality audio with low THD+N (<0.005%) and wide frequency response (20 Hz - 20 kHz). Independent volume controls for each channel. All-metal construction for reliability. External power supply reduces noise. Daisy-chain capability for expanding channels.

Suitable for

• Studio recording and mixing
• Live sound monitoring
• Broadcast and podcasting
• Rehearsal spaces

Key specifications

• 4 headphone channels with 1/4" TRS outputs
• 2 balanced 1/4" TRS line inputs (L/R)
• 2 balanced 1/4" TRS line outputs for daisy-chaining
• Power output: 130 mW per channel into 60 ohms
• Frequency response: 20 Hz - 20 kHz
• THD+N: <0.005%
• SNR: >95 dB
• Input impedance: 10 kOhms
• Output impedance: 51 Ohms
• Master volume, mono/stereo switch, mute switch
• External 16 VAC, 1000 mA power supply included
• Blue color

Recommendations

For optimal performance, use with high-quality headphones and balanced cables. The HP4 is ideal for small to medium studios where multiple musicians need independent headphone mixes.