PreSonus
PreSonus HP4 4-Channel Headphone Amplifier - Compact Design
★★★★★
Compact 4-channel headphone amp delivering 130mW per channel with a whisper-quiet -98dB noise floor.
$149.99*$178.99Save 16%
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*Price sourced from Amazon.com. Last updated:Jun 19, 2026.Price and availability are subject to change.
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Overview
Key Features
4 screaming-loud (130 mW per channel) stereo headphone amps
Wide dynamic range
Can serve as control room monitor control w/ level control & Monitor Mute button
Daisy-chain multiple units via 2 balanced ¼” monitor outputs
Compact 1/3U rack-mount chassis
Mono summing switch
2 balanced ¼” line inputs
Super-quiet with -98dB noise floor
Headphone level control
Specifications
Brand
PreSonus
Model
HP4
Channels
4 stereo headphone outputs
Output Power
130 mW per channel
Inputs
2 balanced ¼" line inputs
Monitor Outputs
2 balanced ¼"
Noise Floor
-98 dB
Features
Global mute, overall level control, mono summing switch
Chassis
Compact 1/3U rack-mount
Pros & Cons
👍 Pros
- Very low noise floor at -98dB keeps the headphone signal clean and detailed
- Four independent outputs each with dedicated level control suit multi-person sessions
- Balanced ¼" inputs and outputs maintain signal integrity across longer cable runs
- Compact 1/3U chassis saves rack space and fits easily on a desktop
- Monitor Mute button and level control add basic control room functionality
👎 Cons
- 130mW per channel may struggle to drive high-impedance headphones to adequate volume
- No XLR inputs, limiting connectivity with some professional source equipment
- Only one stereo input source, so all four outputs receive the same mix
- No individual EQ or pan controls on the headphone channels
Frequently Asked Questions
How many headphones can the HP4 drive at once?
The HP4 has four independent stereo headphone outputs, each with its own level control, so four listeners can monitor simultaneously at their preferred volumes.
Can I daisy-chain multiple HP4 units together?
Yes. The two balanced ¼" monitor outputs let you pass the signal to additional HP4 units, expanding headphone capacity without splitting the source signal externally.
Does the HP4 work as a control room monitor controller?
It can. The unit includes an overall level control and a Monitor Mute button, allowing you to use it as a simple monitor controller for your studio speakers via the balanced monitor outputs.
What does the mono summing switch do?
The mono summing switch combines the left and right channels into a single mono signal across all headphone outputs, which is useful for checking mixes for mono compatibility.
What size rack space does the HP4 require?
It uses a compact 1/3U rack-mount chassis, so it takes up only a third of a standard rack unit width and can sit alongside other half- or third-rack devices.
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