Two way full range passive 15" loudspeaker

Optimal Audio delivers serious full-range performance with the Cuboid 15, a two-way passive loudspeaker built for demanding installed sound environments. Featuring a powerful 15" low-frequency driver paired with a high-frequency compression driver on a rotatable horn, the Cuboid 15 provides extended bass response, clear midrange articulation, and detailed high-frequency reproduction across a wide coverage area.

Engineered for venues requiring high SPL output and genuine low-frequency extension, the Cuboid 15 is ideally suited for live music venues, nightclubs, houses of worship, theatres, and large hospitality spaces. The rotatable HF horn allows seamless switching between horizontal and vertical mounting orientations without compromising coverage, giving installers maximum flexibility during deployment.

- 15" LF driver delivering powerful, extended bass response
- Two-way passive design for simplified signal chain and reliable operation
- Rotatable HF horn enabling versatile horizontal or vertical installation
- Trapezoidal cabinet allowing clustered array configurations
- Multiple M10 rigging points for secure and flexible mounting options
- Robust birch plywood construction with a durable painted finish
- Optimised for use with Optimal Audio amplification including Zone series amplifiers with built-in DSP presets

The Cuboid 15 combines professional-grade components with a practical, integrator-friendly design, making it a compelling choice for medium to large-scale commercial audio installations where performance and reliability are paramount.