PreSonus HP4 4 Channel Distribution Amplifier

Full Description

Reliable headphone monitoring for every studio

The PreSonus HP4 is engineered to simplify headphone monitoring across multiple users. Its four headphone outputs each feature their own volume knob, allowing musicians and engineers to independently set their preferred listening level without affecting others. If you're running a vocal booth, live band tracking, or producer collaborations, this compact solution ensures everyone hears clearly and comfortably.

With up to 130mW per channel, the HP4 delivers ample power for both consumer and professional headphones. Supporting headphone impedances between 32 and 600 ohms, it adapts to a wide range of models, making it a flexible choice for studios of any size.

Monitor control made simple

Beyond its headphone functionality, the HP4 doubles as a compact monitor controller. Its rear-panel TRS monitor outputs feed your studio speakers, while the front-panel Monitor Level knob lets you control speaker volume easily. When recording near open mics or during late-night sessions, you can instantly silence your monitors with the Monitor Mute switch—no need to reach around to power them off or adjust your interface settings.

Mono summing for phase-consistent monitoring

The HP4 includes a mono summing switch, allowing you to combine the left and right inputs into a single mono signal across all outputs. This is especially useful for checking phase alignment and ensuring compatibility for mono playback, which is critical when mixing for various playback systems.

If you only connect one side of your input source (e.g., a single TRS cable), activating mono mode ensures the signal is heard evenly in both ears, maintaining clarity and balance for the performer or engineer.

Easy setup and versatile integration

Connecting the HP4 to your system is straightforward. Two balanced ¼” TRS inputs accept audio from mixers, interfaces, or playback devices, while the two TRS outputs allow for daisy-chaining additional units or routing signal to powered monitors. Its compact size makes it easy to place on a desktop or rack shelf, and its minimal cable requirements ensure clean, uncluttered setups.

The power supply connects via a standard barrel input on the rear panel, and the entire unit is built with a durable steel chassis, ensuring it holds up in both studio and mobile recording environments.

Designed for dependable performance

The HP4 is built to deliver long-lasting, consistent performance. With low total harmonic distortion (0.0025 percent) and a flat frequency response from 20 Hz to 20 kHz, it ensures that what you hear is accurate and free from unwanted colouration or noise. Its discrete headphone amps provide clarity at any level, making it easy to identify details in your mix or performance.

For producers and engineers working in fast-paced or collaborative environments, the HP4 simplifies monitoring while preserving audio quality and workflow efficiency. Whether you're building your first studio or expanding an existing setup, the PreSonus HP4 is a trusted solution that brings clarity, control, and confidence to your headphone and speaker monitoring.

Features

Input/Output

• 4 screaming-loud (130 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: XLR- 1/4" TS, Combo, balanced
• THD+N: 0.0025 , 1 kHz, unity gain
• Max Input Level: +18 dBu,
• Input Impedance: 10k Ohms
• 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,
• Output Impedance: 51 Ohms
• Frequency Response: 20 Hz - 20 kHz, +0.5dB

Headphone Outputs

• Connector Type: 1/4" TRS, stereo
• Max Output Power: 130 mW/Ch
• Frequency Response: 20 Hz - 20 kHz, +0.5 dB, 60 load
• Headphone Impedance Working Range: 32 Ohms - 600 Ohms

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)
• Product Code: 2777404203