Pro-Ject CD Box RS2 Tube: High-End CD Player with Balanced Tube Output

Pro-Ject Audio Systems has long been known for developing focused audio components that deliberately avoid unnecessary complexity in favour of sound quality and engineering discipline. While streaming platforms and server-based audio solutions dominate today’s market, the Compact Disc continues to hold relevance for listeners who value a tangible music library and consistent, uncompressed playback quality. With the CD Box RS2 Tube, Pro-Ject addresses this audience directly, positioning the player within its premium Box Design RS2 Series as a dedicated solution for rediscovering CD collections under contemporary technical standards.

Key Facts

• Dedicated high-end CD player focused exclusively on Red Book CD-DA
• Precision top-loading CD mechanism with mechanical disc clamping
• Integrated digital-to-analogue converter with fully balanced signal path
• True balanced tube output stage using two E88CC valves
• Analogue outputs via Cinch and balanced XLR
• Digital outputs via S/PDIF optical and S/PDIF coaxial
• Rigid aluminium enclosure for mechanical stability and shielding
• Designed and manufactured in Europe

Precision Top-Loading Mechanism

At the core of the Pro-Ject CD Box RS2 Tube is a top-loading CD mechanism developed specifically for audio CDs. The SUOS DM-3381 Red Book CD-DA drive from StreamUnlimited Engineering GmbH places the disc from above and secures it using a magnetic aluminium clamp. This design ensures stable rotation and consistent tracking, reducing mechanical interference during playback. The approach prioritises accurate and repeatable data retrieval, which forms the foundation for reliable digital signal processing.

The solid aluminium chassis is not merely a visual statement but contributes directly to performance. Its mass helps suppress vibration while also shielding sensitive circuitry from external electromagnetic interference.

Servo Control Focused on Reliable Data Retrieval

A newly developed BlueTiger CD-88 servo system manages laser control and error correction. Rather than aiming for broad multi-format compatibility, Pro-Ject focuses on stable and precise CD-DA reading. This becomes especially relevant when playing discs with minor wear, where controlled servo behaviour can significantly improve playback reliability and consistency.

Integrated DAC and Balanced Tube Output Stage

For the first time within the RS2 Series, Pro-Ject integrates a digital-to-analogue converter directly into a CD player of this line. The Texas Instruments PCM1796 DAC operates within a fully symmetrical signal architecture, feeding a true balanced tube output stage built around two E88CC valves.

This tube stage is not intended as a coloration tool but as a carefully tuned analogue output section. Its goal is to combine resolution, spatial accuracy and tonal coherence with a natural, fluid presentation. In practical terms, this allows seamless integration into high-quality HiFi systems, whether operated via balanced XLR or unbalanced Cinch connections.

Connectivity for Classic HiFi Systems

The Pro-Ject CD Box RS2 Tube provides analogue outputs via Cinch as well as fully balanced XLR connectors. Both output paths feature dedicated circuitry and can be used simultaneously without mutual influence.

In addition, digital outputs via S/PDIF optical and S/PDIF coaxial are available. This enables the unit to function either as a complete CD player with internal DAC or as a dedicated CD transport feeding an external digital-to-analogue converter, offering flexibility for system integration.

External Power Supply and Modular System Concept

Power is supplied via an external power unit, keeping interference away from sensitive signal paths inside the player. For advanced systems, Pro-Ject offers optional upgrades using higher-performance external power supplies, allowing users to further refine system performance. This modular approach aligns with the broader RS2 Series philosophy, where components are designed to evolve within a coherent system framework.

Price and Availability

The Pro-Ject CD Box RS2 Tube is priced at € 1.900,-. Availability is scheduled for early January 2026, according to the manufacturer. Distribution will take place through authorised specialist retailers.

Conclusion

With the CD Box RS2 Tube, Pro-Ject Audio Systems delivers a clearly focused CD player that avoids compromise through concentration. By prioritising mechanical precision, symmetrical digital processing and a carefully implemented tube output stage, the player addresses listeners who value dedicated CD playback over multifunctional solutions. For those seeking a modern yet uncompromising way to enjoy their CD collection, the CD Box RS2 Tube represents a technically sound and thoughtfully engineered option.

Technical Specifications