Featured are three Ceramic Metal Matrix Diaphragm (CMMD) drivers, two of which are 5-1/4” low-frequency drivers, and one of which is a 1” high-frequency driver. In particular, the CMMD technology ensures accurately produced audio with near minimal distortion. Signature to the Infinity ALPHA 25es is that it comes with the tools, including binding posts and connectors, needed for an immediate installation.