Features

Two-Way Speaker Design: The Monitor Audio Radius 90 bookshelf loudspeaker features a two-way speaker design with one 1" C-CAM gold dome tweeter and one 4" C-CAM cone woofer. The 1" C-CAM gold dome tweeter is optimized to deliver the finest and widest performance within the compact speaker cabinet. It benefits from a more efficient rear-venting design, releasing air trapped and compressed at the back of the tweeter dome, and guiding it around the drive assembly to a rear-loading chamber. The 4" C-CAM woofer features a large motor and voice coil for increased excursion, high power capability and reduced distortion. The C-CAM tweeter and woofer share an audible consistency producing a smooth transition of frequencies and a sense of realism and cohesion in the soundstage.

C-CAM Technology: The 1" tweeter and 4" woofer of the Radius 90 bookshelf loudspeaker utilize Monitor Audio's proprietary C-CAM speaker technology.

• C-CAM Gold-Dome Tweeter: The gold dome tweeter is formed from a ceramic-coated aluminum/magnesium alloy, gold anodized to a specific thickness for ideal stiffness and damping characteristics. Its new profile and surround geometry have been developed using advanced modeling 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.
• C-CAM Cone Woofer: Ceramic-Coated Aluminum/Magnesium is 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. In 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 cones are liable to flex or twist in operation, producing a significant level of audible distortion. C-CAM cones have a much higher resistance to bending stress and therefore exhibit much greater fidelity over their entire operating range.

Single Through-Bolt Mount: The tweeter and woofer are fixed to the cabinet with a single through-bolt driver fixing mount. This single-through-bolt mount design provides mechanical de-coupling and enhanced midband clarity and resolution. The through-bolts also act as rigid cross bracing to give a very solid non-resonant cabinet.

HiVe II Bass Reflex Port: The Radius 90 uses a bass reflex cabinet with Monitor Audio's HiVe II port design for greater efficiency and bigger bass response from a smaller speaker. The HiVe II bass reflex port is shaped to have the same effect on airflow as a gun-barrel on a bullet. Rifled grooves inside the port help to accelerate the flow and reduce turbulence, so air moves in and out of the port more efficiently, for a faster more dynamic bass response.

Stylish Cabinet: The Monitor Audio Radius 90 features a beautiful precision cabinet in a gloss black, satin white, or walnut veneer lacquer finishes. The cabinet's smooth rounded edges, silver trim, and metal mesh grille add to the style and look of the speaker.

Gold-Plated Binding Posts: The Radius 90 is fitted with gold-plated binding post speaker terminals that will accept bare wire (up 12AWG), pin-connectors, spade connectors, and banana plugs (single or dual).

Mounting Options: Self adhesive rubber feet are provided to prevent movement due to vibration when using the Radius 90 loudspeakers on a table, shelf, or stand. And thanks to its rear-panel 1/4"-20 threaded insert, the Radius 90 can also be fixed to a wall using an optional wall-mount bracket (sold separately).