FBT Vertus CLA 118 SA Active Bass reflex subwoofer is a subwoofer in birch plywood with a 460mm woofer from B&C in a bass reflex port with an extensive laminar airflow, minimizing turbulence and power compression. The Class-D, switching power amplifier module is constructed in die-cast aluminum with natural convection, and is rated at 1200W. Onboard DSP also offers functions such as filtering, equalization and protection. When you need to extend the performance of the CLA406A, especially in live applications, the CLA118SA acts as a support and base for the CLA406A column that can be applied, via optional hardware, with M20 points positioned on the top of the sub. The CLA118Sa is also modular and can be stacked thanks to special milling, increasing the SPL and raising the base of CLA406A.