Head Box S3 B

Fully balanced high end headphone amplifier

Made In Europe

Built to Perform, Built to Last

The Head Box S3 B is a high-performance headphone amplifier built around a unique, fully balanced topology that redefines what is possible in its price class. Designed for audiophiles who demand surgical clarity, precision, and flexibility, it supports both balanced and single-ended headphones and integrates seamlessly into modern desktop and hi-fi systems.

Designed with the overarching goal to find the perfect balance between output power and perceived sound quality the Head Box S3 B sets new standards in its price range.

Fully Balanced Power

The Head Box S3 B features a fully balanced signal chain for both RCA and XLR inputs, ensuring maximum channel separation and minimal noise. Balanced headphone connections are available via 4.4 mm Pentaconn and XLR outputs, while single-ended headphones are supported through 3.5 mm and 6.3 mm outputs.

Premium Casework

The amplifier is housed in a premium, full aluminium enclosure that provides both mechanical stability and effective shielding.

Made in EU

Made in Europe by technicians, engineers and designers with decades of experience. Expert craftsmanship. Sustainable products with a long lifetime. Audiophile audio performance.

Technical Specifications

• Max. power output: 480mW / 8 Ohms, 680mW / 16 Ohms, 820mW / 32
• Ohms, 320mW / 300 Ohms
• Headphones output: 3.5mm, 6.3mm, 4.4mm balanced, 4 pin balanced XLR
• SNR: > 115dB „A“-wt. at 1kHz
• THD: < 0,002% at 1kHz @ 500mV Input
• Crosstalk: < -81dB at 10kHz
• Gain: 15dB / 9dB (RCA In /XLR In)
• Frequency response: < -0,25dB at 20Hz-20kHz
• Analogue inputs: 1 pair RCA/Cinch, 1 pair XLR
• Analogue loop outputs: 1 pair RCA
• Headphone impedance: min. 8 Ohms
• Power supply: 18V/1A DC, 110-240V, 50/60Hz
• Standby Power consumption: < 0,5W
• Dimensions W x H x D: 206 x 55 x 153 (170) mm
• Weight: 950 g without power supply