The CDM 7SE has an additional paper/Kevlar® bass driver which delivers a fast bass response. ● The technology has been advanced even further in the CDM 7SE. The bass units now feature dispersion modifiers in the centre of the voice coils. Replacing the normal dust caps, these improve dispersion in the mid frequencies and give better integration between the drive units, resulting in greater detail and dynamics. ● The crossover boards incorporate tweeter filters, maximising the benefits of bi-wiring. The stunning aesthetics hide a simple fact that the panoramic, studio quality sound delivered by these speakers is rarely equalled. T echnical highlights ● Tweeter on top: B&W's Tweeter on top technology ensures that the sound remains focused and time-sensitive and that the stereo-image is presented with unparalleled three dimensional accuracy. Kevlar®: B&W developed and patented the method of using Kevlar® for loudspeaker cones to reduce unwanted standing waves. DuPont originally created Kevlar® for use in bulletproof vests.