Pro-Ject Speaker Box 5 S2 Satin Red (Pair)

The Pro-Ject Speaker Box 5 S2 sits at the heart of the Pro-Ject speaker range: a compact, two-way bookshelf loudspeaker designed as a significant step up from the entry-level Box 3 E, offering audiophile-grade engineering in a cabinet that fits readily on a shelf or stand. Sold as a matched stereo pair and manufactured entirely in Europe, the Speaker Box 5 S2 has earned a strong reputation for punching well above its price point in both transparency and dynamic expression.

Drivers and Crossover

A 25 mm silk-dome tweeter handles the high frequencies, delivering crystal-clear highs with low distortion and a smooth, extended response. The 130 mm fibre-glass cone woofer provides full-bodied mids alongside punchy, well-controlled bass. The crossover is wired direct to the drivers without a printed circuit board, using only audiophile-grade components and lead-free solder. This direct-wired approach minimises signal degradation between amplifier and driver.

Cabinet Design

The bass-reflex cabinet is constructed from ultra-stiff, non-resonating MDF with sophisticated internal bracing to suppress unwanted colorations. Pro-Ject uses a specially selected, resistant and eco-friendly adhesive throughout the assembly to ensure an airtight, vibration-free enclosure. The result is a compact cabinet that controls bass output with precision while keeping the mid-range clean and open.

Sensitivity and Amplifier Matching

With a sensitivity of 88 dB (1W/1m) and a nominal impedance of 8 ohms, the Speaker Box 5 S2 is a straightforward load for any stereo amplifier. Pro-Ject recommends driving them with between 10 and 150 watts RMS. As with any loudspeaker, using an amplifier with sufficient headroom reduces distortion at lower volumes and protects the drivers during extended listening sessions.

Finishes

The Speaker Box 5 S2 is available in eight finishes: two high-quality wood veneers (Walnut and Eucalyptus) and six satin painted options (Satin Black, Satin White, Satin Yellow, Satin Green, Satin Blue, and Satin Red). Each finish is applied to the same MDF cabinet, giving buyers the freedom to choose a speaker that suits their room and system aesthetics. The Satin Red finish shown here is a bold, low-sheen option for those who want a striking, characterful speaker.

Press Recognition

The Speaker Box 5 S2 has been praised by the international audio press. John Darko called it "a proper overachiever" in January 2024, noting that it "sounds cleaner and more urgent and more incisive." French publication Diapason described it as delivering "so much music in such a small volume" in December 2022. Mad Audio said: "I'm really, really, really happy to recommend the Speaker Box 5 S2 — I love them!" Two black speaker grilles are included.