RDT®
RDT is a unique technology developed specifically by Monitor Audio's engineers for the Platinum series of loudspeakers*. Designed to reduce mass and increase cone stiffness, RDT applies ultra-thin skins of C-CAM to a core of honeycomb Nomex®** material, creating a structure which is extremely light but incredibly rigid. At only 40 microns thick, the C-CAM skins are half the thickness of a human hair, yet when bonded to the Nomex core they form an RDT cone, which is 150 times more rigid than a single layer of 200 micron C-CAM alloy, but has a fraction of the overall mass. These properties allow the cone to operate as a lightning-fast piston for a clearer more natural sound. The RDT cone's concave geometry has been refined by FEA analysis to provide a smooth frequency response and to eradicate break-up.
* PLW-15's driver is C-CAM only
** Nomex® is a registered trademark of E.I DuPont de Nemours and Company
RST®
The RST cone profile comprises a radial pattern of surface dimples. Our simulations and listening tests have proved that the dimples significantly increase cone rigidity allowing C-CAM/RST cones to resist mechanical bending forces, which can twist the shape of lesser cones and produce distorted sound. The strengthening effect of the RST dimples means that we can use thinner, lighter more responsive C-CAM cones, providing speed and accuracy but offering greatly reduced distortion. The RST dimples also help to displace standing waves that can propagate on the cone's surface.
Gold Dome C-CAM®
The gold dome tweeter is formed from a ceramic-coated aluminium/magnesium alloy, gold anodised to a specific thickness for ideal stiffness and damping characteristics. Its new profile and surround geometry have been developed using advanced modelling tools, to provide the optimum qualities for accurate sound reproduction. The new design moves the first order of breakup to beyond 35kHz, producing a linear response way beyond audibility, which matches the wide frequency bandwidth available from HD music and cinema sound formats.
The gold dome is thinner, lighter, more rigid and therefore more efficient than domes made from other materials which are prone to distortion in the audio band.
