Pro-Ject Pre Box S3 Pre Amplifier

The Pro-Ject Pre Box S3 Pre Amplifier is designed as a true all-in-one control centre for modern hi fi systems. Despite its compact size, it combines an analogue preamplifier, high-quality DAC, MM phono stage, headphone amplifier, Bluetooth receiver, and TV eARC input in a single elegant unit. With a total of thirteen inputs and outputs, it brings together analogue, digital, and wireless sources with remarkable flexibility.

Whether you are connecting a turntable, streamer, television, or active speakers, the Pre Box S3 acts as the central hub of your system. Built around a dual mono design and housed in a premium aluminium chassis, it delivers high-fidelity sound while remaining easy to integrate into both traditional and contemporary audio setups.

Audiophile Analogue Performance

At its core, the Pre Box S3 is a fully analogue dual mono preamplifier designed to preserve signal purity and musical detail. The analogue volume control uses a motor-driven potentiometer, allowing precise level adjustment without degrading sound quality. A high-gain moving magnet phono stage with 45 dB of gain ensures low noise, excellent linearity, and natural tonal balance for vinyl playback.

Line-level analogue inputs are equally refined, offering clarity and control when connecting CD players or other sources. Careful circuit layout and premium components contribute to impressive channel separation and low distortion. The result is a clean, dynamic presentation that allows music to sound open and engaging, regardless of the source being used.

High Resolution Digital and Wireless Sources

The Pro-Ject Pre Box S3 Pre Amplifier integrates a Cirrus Logic CS4344 DAC capable of handling digital audio up to 24-bit and 192 kHz. Multiple digital inputs, including coaxial, optical, asynchronous USB-C, Bluetooth, and HDMI eARC, allow seamless connection to modern digital sources. Bluetooth 5.0 with aptX HD support enables high-quality wireless streaming from smartphones, tablets, and computers with excellent detail and dynamics.

The eARC input allows direct connection to a television, delivering improved sound quality compared to standard TV speakers. Digital sources benefit from careful clocking and low noise power regulation, ensuring clean conversion and a natural, balanced sound across a wide range of content.

Headphone Listening and Output Flexibility

For private listening, the Pre Box S3 includes a built-in headphone amplifier with a 6.3 mm jack output, capable of driving headphones from 16 to 600 ohms. Delivering clean power and low distortion, it ensures detailed and controlled sound even with demanding headphones.

Output options are equally versatile, with a variable RCA output for power amplifiers or active speakers, a fixed line output for a second zone or external headphone amplifier, and a dedicated subwoofer output for integrating low-frequency support. This flexibility makes the Pre Box S3 equally suitable for compact desktop systems and full-scale living room setups, adapting easily to different listening preferences and system configurations.

Smart Integration and European Craftsmanship

Designed and manufactured in Europe, the Pro-Ject Pre Box S3 Pre Amplifier reflects a focus on precision engineering, reliability, and elegant design. The robust aluminium S3 chassis provides effective shielding against interference while maintaining a refined appearance in either silver or black finish. Custom installation features such as a 12-volt trigger output and RS232 control make it suitable for smart home and multi-room systems.

Low standby power consumption ensures energy-efficient operation without sacrificing responsiveness. By combining advanced connectivity, audiophile sound quality, and thoughtful system integration, the Pre Box S3 delivers a complete and future-ready preamplifier solution for listeners who value performance, versatility, and compact design.