The Metal Behind Monitor Audio

The key feature that makes Monitor Audio stand out from the crowd is the company’s ability to utilize metal in their driver and tweeter technology, resulting in speakers with superior sound and performance unlike any other. Here we take a closer look at some of the different drivers that are found in Monitor Audio’s vast range of traditional, lifestyle, and custom speakers.

RDT II (Rigid Diaphragm Technology – 2nd Gen)
RDT II is a composite ‘sandwich’ structure made from ultra-thin low mass skins, bonded to a honeycomb Nomex® core material. It is very light and very strong, meaning that it can respond with great speed without bending – just like a perfect piston. RDT II uses C-CAM for the front skin, while the rear skin is made from a woven carbon fibre material. Monitor Audio discovered that this new structure reduces distortion by over 8 dB above 300 Hz, which makes RDT II the lowest distortion cone technology in Monitor Audio’s history.

RST (Rigid Surface Technology)
The RST cone profile is inspired by the Japanese art of Origami, which demonstrates how a very light material (like paper) can be strengthened and made more rigid by making small and precise folds on its surface. Monitor Audio has applied this principle to further enhance C-CAM drivers in higher-end speaker ranges, such as Silver and Gold.

Developed and perfected using sophisticated computer modelling (Finite Element Analysis), the driver cones have been strengthened by a pattern of dimples. RST significantly increases cone rigidity, allowing the radiating surfaces to resist mechanical bending forces, which can twist the shape of conventional driver cones to produce distorted sound. The strengthening effect of RST means that Monitor Audio can use thinner, lighter and more responsive C-CAM cones, which provide speed and accuracy while offering greatly reduced distortion. The RST patterns also help to displace standing waves that can propagate on the cone’s surface.

Speakers: Gold Series, Silver Series, Apex Series, SoundFrame, Core (300 Series), CP (300 Series & 460X model).

C-CAM (Ceramic-Coated Aluminum Magnesium)

The driving force behind Monitor Audio is C-CAM, a material originally developed by the aerospace industry for jet engine components. Its properties are ideal for loudspeaker cones being extremely rigid, yet light enough to yield high overall efficiency. During manufacture, aluminum/magnesium alloy undergoes a three-stage stress-relieving process to remove surface deformation and molecular weakness. Once formed, the alloy cone is subjected to a high temperature anodic coating process in which a layer of pure ceramic alumina is depleted onto its surfaces to a depth of 50 microns, producing a completely rigid sandwich of alloy and heat-dissipating ceramic material.

Conventional drivers are liable to flex or twist in operation, producing a significant level of audible distortion. C-CAM drivers have a much higher resistance to bending stress and therefore exhibit much greater fidelity over their entire operating range. C-CAM tweeters and woofers share an audible consistency producing a smooth transition of frequencies and a sense of realism and cohesion in the soundstage.

Furthermore, C-CAM bass drivers are able to resist the bending distortion imposed by sudden and extreme bass excursions to reproduce very clean, deep and dynamic bass frequencies.

Speakers: Bronze Series, Radius Series, Soundbars, Super Slim (230 & 430 models), Core (200 Series), CP (200 Series), Flush Fit, Custom Subwoofers, Climate Series, AWC Series, Vecta Series.