FBT CLA 118SA Active Bass Reflex Subwoofer - 18"The CLA 118SA is a subwoofer in birch plywood with a 460mm woofer from B&C in a bass reflex port with an extensive laminar airflow, minimising turbulence and power compression. The Class D, switching power amplifier module is constructed in die cast aluminium with natural convection, and is rated at 1200W. Onboard DSP also offers functions such as filtering, equalisation and protection. When you need to extend the performance of the CLA406A,