The CCS Series was designed for high-end audio installation where full impact bass output along with high sound pressure levels is imperative. The speaker component is situated in a sealed metal back-box.The unit uses a 4 or 6 long throw low frequency driver along with a 1 tweeter mounted on axis for single point sound output. A bass port on the front of the baffle serves to further extend the low frequencies of this speaker. Transformer selection is completed via a screwdriver adjustable dial on the front of the baffle easily accessible by removing the grille. Tweeter Type: 1?????? titanium dome with ????????? moving coil and neodynium magnet. Cone Material (driver) Polypropylene with rubber surround.