The FBT Vertus was created with the thought of integrating professional array technology in an extremely compact and elegant speaker column. It's a light and compact modular system created for a multitude of uses and comprising of two products. The first is the CLA 604a, a bi-amp two-way active column speaker system (400 + 100W RMS) and a CLA 208Sa active subwoofer (600W RMS). This system is hired out as 2 x CLA604a's and 2 x CLA 208Sa units. If you want event more power then multiple sets can be combined together.