The Vertus CLA 406.2A comprises four custom 6.5" inch woofers with 1.5" voice coils and a 1.4 inch large format Neodymium compression driver with 2.5 inch voice coil with a 100 H x 25 H degree dispersion .The built in amp module delivers 600W for LF section and 300W for HF for 133dB SPL Designed to be used with the CLA 118SA