d.C.d. means “de Coupling damping”. It refers here to a combination of decoupling and damping technologies in a new kind of footer, which helps to damp resonances as well as optimally decouple the unit from its support. This is done without displacing resonances into acoustically more agreeable regions, or any reduction in dynamics. (Loss of dynamics is the result of nearly all damping measures.)
The feet consist of two special aluminum elements. The upper part is combined with a special acoustic damping material. Between the two aluminum parts there is a special complex mesh which works to decouple the unit ideally from the support. The lower part is additionally decoupled from the support by a felt pad.
The results: sound becomes cleaner, more structured and transparent, distortion and impurities are considerably reduced, dynamics (both macro and especially microdynamics) are improved and the sonic image is completely freed from the speaker enclosures.