The CCM683 is a true high performance ceiling-mount speaker. The speaker features a 200mm (8in) woven blue Aramid Fiber cone bass/midrange driver and an aluminum tweeter in a neat circular die-cast chassis. The tweeter's housing pivots for adjustable off-axis treble response and the die-cast chassis provides extra rigidity that results in a cleaner, faster bass. The speaker also has a three-position EQ switch for a better off-axis response. The blue Aramid Fiber cone means that the unit is well hidden behind the grille but still produces a remarkably clear and dynamic sound