The CWM663 features a blue Aramid Fiber bass/midrange driver housed in a die-cast chassis which provides the extra rigidity to provide a cleaner, faster bass. Its aluminum tweeter also incorporates a Nautilus tube to absorb unwanted sonic radiation. The CWM663 also uses a three-position high frequency switch to fine tune the sound. The speaker is incredibly easy to install incorporating QuickDogs and plug-and-play functionality.