Monitor Audio Silver Centre Speaker (High Gloss Black Lacquer) Improved C-CAM (Ceramic-Coated Aluminium/Magnesium) gold dome tweeter design with damped rear chamb Dual 6 bass drivers featuring concave dished C-CAM cone profile. RST (Rigid Surface Technology) cone profile, for improved diaphragm rigidity and reduced distortion Twoway M-T-M configuration in a sealed cabinet for accurate performance when installed in cabinet o Improved cast polymer bass chassis design for better rigidity and reduced reflections.