Fohhn XS-4 Active Subwoofer

Fohhn XS-4 – Compact Active Subwoofer for Professional Sound Installations

The Fohhn XS-4 is a compact, active subwoofer designed for professional sound reinforcement systems, providing precise low-frequency amplification in small to medium-sized spaces. It is ideal for applications such as restaurants, bars, conference rooms, event spaces, and mobile installations. Despite its compact size, the XS-4 delivers impressive power and deep, punchy bass, making it a perfect complement to full-range speaker systems.

The XS-4 features a 12-inch woofer and a built-in Class D amplifier delivering 600 W RMS power, ensuring high energy efficiency while providing ample power to handle sound reinforcement in various environments. The enclosure is made from high-quality birch plywood with a durable polyurethane finish, ensuring long-lasting durability and resistance to mechanical damage. Thanks to its compact dimensions, the XS-4 can be easily integrated into existing sound systems, offering installation flexibility.

Fohhn Audio AG is a German company headquartered in Nürtingen near Stuttgart, founded in 1993 by musicians and sound engineers. For over three decades, Fohhn has been designing and manufacturing professional sound reinforcement systems — from point source and line source speakers, through subwoofers, to amplifiers and signal processors. Every component, both hardware and software, is engineered and made entirely in Germany, ensuring the highest quality control at every stage of production. The company holds ISO 9001 (quality management) and ISO 14001 (environmental management) certifications.

The XS (Xperience Subwoofer) series was designed for mobile applications where compact construction and ease of transport are essential without compromising sound quality. The subwoofers in this range — from the XS-10 to the flagship XS-4 — cover a wide spectrum of uses: from intimate corporate events, through restaurant and bar sound systems, to professional concert installations. The XS-4 features an efficient Class D amplifier that delivers high energy efficiency with minimal heat generation, enabling extended operation without the risk of overheating.

The Fohhn XS-4 enclosure is built from birch plywood — a material prized in professional audio for its excellent strength-to-weight ratio. The polyurethane finish protects the surface against scratches and mechanical damage, which is critical in conditions involving frequent transport and event setup. Balanced XLR inputs and outputs enable easy integration with existing sound systems, while the pass-through connection allows daisy-chaining additional devices in the audio chain without requiring additional splitters.

The Fohhn XS-4 pairs exceptionally well with full-range speakers from the same manufacturer — particularly the XT and AT series — creating a cohesive sound system with a balanced tonal character. Thanks to precisely tuned crossover points and matched power handling, combining the XS-4 subwoofer with Fohhn satellite speakers ensures uniform sound coverage across the entire frequency range from low bass to high frequencies, eliminating the typical linearity and phase issues encountered when mixing equipment from different manufacturers.