L-Acoustics KS28

The L-Acoustics KS28 is a formidable high-power subwoofer module built to meet the rigorous demands of modern live sound reinforcement. At its heart is a pair of custom long-excursion 18-inch woofers, each mounted in a boundary-coupled, front-loaded enclosure that optimizes low-frequency output and efficiency. Its compact, trapezoidal form is both strong and stackable, allowing it to serve as a base for full line arrays or be flown as part of an integrated rig. The KS28’s acoustic architecture is engineered to minimize distortion, to maximize output per watt, and to deliver exceptionally accurate and articulate bass response even at high levels. The cabinet is ruggedly built, with heavy-duty steel fittings and recessed handles, making it suitable for heavy touring use.

In operation, the KS28 delivers deep, powerful low end with the kind of control and coherence expected in premium systems. The voicing and tuning allow it to transition smoothly into the mid / low range of the line array modules above, preserving clarity and punch. Because of its design, the KS28 provides excellent coupling to the ground or to floor planes, yielding extra output when stacked. Its dynamic range is impressive — capable of producing massive sound pressure levels while retaining transient detail, which is essential for music, film soundtracks, or any signal requiring both power and definition. The module also handles thermal and excursion demands well, giving engineers confidence during long sets or high-demand segments.

In practical deployment, the KS28 fits into large-scale installations, stadium tours, festival setups, or any high-performance sound system where deep, impactful bass matter. It pairs naturally with L-Acoustics line array modules (or compatible systems) to complete a full-range system capable of delivering consistently high fidelity from sub-bass through high frequencies. Its stacking and flying capabilities, durable build, and acoustic precision make it a favorite among system integrators and touring professionals. Maintenance is relatively straightforward: access to drivers and internal components is well thought out, rigging features are integrated, and the system is sufficiently robust to hold up under real-world touring stresses. Overall, the KS28 is a powerful subwoofer solution designed to provide authoritative low frequency reinforcement in demanding environments.