Pro-Ject
Head Box S2 High-Performance Headphone Amp
Best compact amplifier for audiophiles seeking high-performance power for demanding headphones.
Unlock the full potential of your headphones with the Pro-Ject Head Box S2. This high-performance amplifier is designed for audiophiles, delivering crisp, clean sound with a robust 725mW output, perfect for demanding headphone models. Its compact, aluminum/steel enclosure shields sensitive circuitry from interference and vibrations, ensuring pure audio reproduction. Featuring gold-plated RCA inputs and dual headphone outputs (1/4" and 1/8"), it offers exceptional versatility for shared listening experiences. Ideal for connecting to laptops or smartphones, it elevates your audio to an immersive, musical level.
$199.00
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Owner Satisfaction
4.6
/ 5
Category Rank
255
/ 732
#255 in Headphone Amplifiers
Price vs Category Average
-86%
Below average
Output power
72532
/ mW (into ohms)
Who it's for
- Audiophiles using demanding, high-impedance headphones
- Listeners seeking precise clarity and instrument separation
- Desktop users with limited workspace
Who should skip it
- Users requiring balanced headphone connections
- Minimalists frustrated by bulky wall-wart power adapters
- Listeners preferring a warm, forgiving sound signature
Performance breakdown
Power Output
Robust 725mW output handles demanding high-impedance headphones with impressive authority.
Signal Clarity
Ultra-low distortion and noise floor ensure a pristine, transparent listening experience.
Build Integrity
Sturdy aluminum and steel chassis effectively shields against unwanted electromagnetic interference.
Connectivity Versatility
Dual outputs and a bypass loop offer excellent flexibility for desktop setups.
Form Factor
Compact footprint fits seamlessly into any crowded workspace or minimalist audio rig.
Impedance Compatibility
Wide range support effortlessly drives everything from sensitive IEMs to heavy cans.
Key Specs
Output power
725mW (into 32ohms)
Signal to noise ratio
-110dBV
Total harmonic distortion
< 0.002%
Frequency response
20Hz – 80kHz
Headphone impedance range
8 – 600 Ohm
Analogue inputs
1 pair RCA
Power supply
5V/0.5A DC
Dimensions
12 × 10.3 × 3.7 cm
Features
- Drives demanding headphones with ease
- Dual headphone outputs for shared listening
- Bypass loop for connecting another amplifier
- Low noise components for pristine sound
- Compact design fits anywhere
- Protective aluminum/steel casing
- Handmade quality from Europe
- Simultaneous use of both headphone jacks
What customers say
Consumers are overwhelmingly positive about the Head Box S2, consistently highlighting its exceptional audio quality. Users report a noticeable improvement in clarity and detail, making demanding headphones truly sing. The compact, robust design is frequently praised, allowing this high performance unit to integrate seamlessly into any desktop setup. This amplifier successfully delivers high end sonic performance in a surprisingly small footprint, establishing strong value for serious listeners.
Know before you buy
Yes, it is designed to handle a wide range of headphones from 8 to 600 Ohms. With a 725mW output, it provides sufficient power to drive even demanding, high-impedance models effectively.
Yes, the Head Box S2 supports simultaneous use of both the 6.35mm and 3.5mm jacks. This makes it a great choice for shared listening sessions.
The bypass loop allows you to pass the audio signal through the Head Box S2 to another amplifier or active speaker system. This is useful if you want to integrate the unit into a larger audio setup without needing to unplug cables.
The unit comes with a dedicated 5V/0.5A DC power supply. It is designed to be plugged into a standard wall outlet to ensure consistent, noise-free performance.
The Head Box S2 features a rigid aluminum and steel enclosure that protects the internal circuitry from external electromagnetic interference and mechanical vibrations. This shielding is essential for maintaining the low noise floor and high signal clarity the unit is known for.
Yes, you can connect your smartphone or laptop to the RCA inputs using a standard 3.5mm-to-RCA cable. It acts as a significant upgrade to the built-in headphone jacks found on most consumer devices.
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$199