The Pro-Ject Pre Box S2 Digital is a remarkably compact yet feature-rich digital preamplifier, DAC (Digital-to-Analog Converter), and headphone amplifier. Housed in a sturdy aluminum enclosure, it offers a high level of sonic performance and versatility for its small size. This "Swiss Army Knife" of digital audio is designed to enhance the sound quality of various digital sources like computers, streamers, and CD transports, while also providing a capable headphone output and preamp functionality with a variable analog output.
At its core, the Pre Box S2 Digital utilizes a sophisticated dual-mono design featuring two high-end ESS Sabre ESS9038 DAC chips. This configuration allows for exceptional detail retrieval, a wide dynamic range, and a low noise floor. It supports high-resolution audio formats up to 32bit/768kHz PCM and DSD512 (via DoP and native), catering to even the most demanding audiophiles. Notably, it also boasts full hardware MQA (Master Quality Authenticated) unfolding via its USB input, allowing users to experience the full potential of MQA-encoded music from streaming services like Tidal. Pro-Ject has implemented several proprietary technologies in the Pre Box S2 Digital to further enhance its performance. This includes a custom clock circuitry design that achieves incredibly low jitter rates (as low as 100 Femtoseconds), outperforming many more expensive clock generators. Additionally, it features a proprietary Optimum Transient digital filter among its eight selectable digital filter characteristics, allowing users to fine-tune the sound to their preference. High-quality components such as organic polymer capacitors and thin-film miniMELF resistors are used throughout the design. Connectivity options are comprehensive for its size, including a USB-B input for computer audio, a coaxial S/PDIF input, and an optical TOSlink input. All digital inputs, except USB, support up to 24bit/192kHz. Analog outputs include a front-mounted 6.3mm headphone jack and a pair of variable RCA outputs for connecting to a power amplifier or active speakers. The front panel features a clear OLED display that shows volume level, selected input, sample rate, and MQA status. A remote control is typically included for convenient operation.
The Pro-Ject Pre Box S2 Digital is a compelling solution for audiophiles seeking high-fidelity digital audio playback, headphone amplification, and preamp capabilities in a space-saving and affordable package. Its impressive technical specifications and thoughtful design make it a standout performer in its class.
Key Features:
Dual Mono Construction: Features two ESS Sabre ESS9038 DAC chips for optimal channel separation and sonic performance.
High-Resolution Audio Support: Handles PCM up to 32bit/768kHz and DSD up to DSD512.
MQA Hardware Decoding: Fully unfolds MQA files via the USB input.
