Short summary
A fully balanced headphone amplifier with strong channel separation. It accepts both balanced and single-ended headphones and inputs, with optimised power delivery in a full aluminium chassis, designed and made in Europe.
Key info
- Fully balanced headphone amplifier
- High channel separation from the balanced design
- Balanced and single-ended headphone outputs
- Balanced and single-ended inputs
- Optimised power delivery
- Full aluminium chassis for stability and shielding
- Designed and manufactured in Europe
Specifications
| Weight | 950 g |
| Dimensions (HxWxD) | 206 x 55 x 153 (170) mm |
| Power output | 480mW / 8 Ohms, 680mW / 16 Ohms, 820mW / 32 Ohms, 320mW / 300 Ohms |
| THD | < 0,002% at 1kHz @ 500mV Input |
| Frequency response | < -0,25dB at 20Hz-20kHz |
| S/N Ratio | > 115dB „A“-wt. at 1kHz |
| Gain | 15dB / 9dB (RCA In /XLR In) |
| Power Supply | 18V/1A DC, 110-240V, 50/60Hz |
| Analog inputs | 1x RCA, 1 XLR |
| Digital inputs | 1x 3.5mm, 1x 6.3mm, 1x 4.4mm balanced, 1x 4 pin balanced XLR |
Description
Engineered for Endurance and Precision
The Head Box S3 B is a high-performance headphone amplifier engineered around a distinctive fully balanced topology that pushes expectations within its class. Created for listeners who value analytical accuracy, control, and adaptability, it supports both balanced and single-ended headphones while fitting effortlessly into desktop and traditional hi-fi environments. Every design choice prioritizes signal integrity and usability. Its compact form makes it ideal for serious listening without sacrificing space.
Optimised Balance Between Power and Sound
The primary design objective behind the Head Box S3 B was achieving an ideal equilibrium between output strength and perceived sonic refinement. By carefully tuning amplification stages, it delivers authority without compromising tonal accuracy or musical detail. This thoughtful approach allows the amplifier to outperform typical designs at its price point. The result is a sound signature that feels controlled, natural, and consistently engaging.
True Balanced Signal Architecture
The Head Box S3 B employs a completely balanced signal path across both RCA and XLR inputs, maximising channel separation while keeping noise to an absolute minimum. Balanced headphone outputs are provided via 4.4mm Pentaconn and XLR connectors, while single-ended compatibility is maintained through 3.5mm and 6.3mm outputs. This flexibility ensures compatibility with a wide range of headphones. Users can switch between connection types without altering performance integrity.
Balanced Amplification for Maximum Performance
By combining genuine balanced amplification with carefully defined power targets, the Head Box S3 B allows headphones to operate at their intended potential. This design strategy preserves dynamics while preventing unnecessary coloration or distortion. The amplifier maintains clarity even at demanding listening levels. As a result, subtle details and spatial information remain intact.
Precision Aluminium Construction
The amplifier is enclosed in a high-quality, full aluminium chassis that provides excellent mechanical rigidity and effective electromagnetic shielding. This solid construction reduces vibration and protects sensitive internal components. The enclosure also contributes to long-term reliability and thermal stability. Its understated design complements both modern and classic audio setups.
European Craftsmanship and Reliability
Manufactured in Europe by experienced technicians, engineers, and designers, the Head Box S3 B reflects decades of accumulated expertise. Precise assembly standards ensure consistent performance and long operational life. The focus on sustainable manufacturing reinforces its durability and long-term value. Every unit is built to meet audiophile expectations without compromise.

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