Pro-Ject Head Box S3 B Fully-Balanced High-End Headphone Amplifier

Head Box S3 B Fully-Balanced High-End Headphone Amplifier, by Pro-Ject Audio Systems.

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 / performance class.

Designed for audiophiles who demand surgical clarity, precision, and flexibility, Head Box S3 B 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.

The carefully engineered circuit design ensures a clean, dynamic, and highly controlled presentation, allowing headphones to truly perform at their full potential.

By combining true balanced amplification with comprehensive connectivity and practical system integration, Head Box S3 B offers a compelling solution for listeners seeking reference-level performance in a compact and accessible format.

Features

• NEW Unique fully balanced headphone amp topology
• NEW Powerstage realized by two TPA6120A2 chips
• NEW up to 820 mW fully balanced output power
• NEW Fully balanced signal chain for RCA & XLR input
• NEW Balanced headphone outputs: 4.4 mm & XLR
• NEW Redefines balanced headphone amps in this class
• Single ended headphone outputs - 3.5 mm & 6.3 mm
• Bypass RCA loop output for additional amplifier
• Premium full aluminium casework
• High-quality full aluminium control elements & buttons
• Available in silver or black
• Made in Europe

Specifications

• Max Power Output: 480 mW / 8 Ohms, 680 mW / 16 Ohms, 820 mW / 32 Ohms, 320 mW / 300 Ohms
• Headphones Output: 3.5 mm, 6.3 mm, 4.4 mm balanced, 4-pin XLR balanced
• SNR: > 115 dB A-wt @ 1 kHz
• THD: < 0.002 % @ 1 kHz, 500 mV Input
• Crosstalk: < -81 dB @ 10 kHz
• Gain: 15 dB / 9 dB (RCA In / XLR In)
• Frequency Response: > -0.25 dB @ 20 Hz - 20 kHz
• Analogue Inputs: 1 pair RCA / Cinch, 1 pair XLR
• Analogue Loop Outputs: 1 pair RCA
• Headphone Impedance: min. 8 Ohms
• Power Supply: 18 V / 1 A DC, 110-240 V, 50 / 60 Hz
• Standby Power Consumption: < 0.5 W
• Dimensions (W x H x D): 206 x 55 x 153 mm
• Weight: 950 g without power supply

Included

• 1 x Head Box S3 B
• 1 x Power Supply
• 1 x Documentation

More Information

• Head Box S3 B, by Pro-Ject Audio Systems