Introducing genuinely esoteric yet affordable performance and quality, Monitor Audio’s Platinum loudspeakers are engineered to achieve the most natural sound possible. In our quest for true fidelity, we’ve harnessed new materials, developed innovative new technologies, tested, refined and optimised every last design detail, and verified the science with plenty of good old-fashioned listening.
Every component part is produced to exacting standards and each speaker is carefully hand-built by our small team of technicians. The Platinum Series represents the epitome of British design and quality, demonstrating Monitor Audio’s devotion to music and film sound reproduction.
- Craftsmanship and Quality
Each pair of Platinum loudspeakers is an original work of art. Monitor Audio’s cabinet makers hand select uniquely matching sets of exotic natural wood veneer in Santos Rosewood or Ebony for every pair.The veneers are applied by hand after the cabinet is made to ensure that the grain match is precise and that no joints are visible. After meticulous inspection, no fewer than eleven layers of clear gloss piano lacquer are applied to enhance the exquisite grain definition and rich variety of colour within each veneer.
The front baffles are hand-upholstered using Strathspey leather supplied by Andrew Muirhead. Strathspey’s natural leather is of the very highest quality and is associated with many respected British brands from the furniture, automotive and marine industries. It conveys a tactile sense of luxury which blends with the lustrous beauty of Platinum’s lacquered veneer finishes to impart an immediate impression of excellence in any room, however lavish its décor.
Platinum promises a depth of beauty, quality and performance that will inspire an intense pride of ownership in lovers of music and design.
- Ceramic-Coated Aluminium/Magnesium (C-CAM®)
Since 1972, Monitor Audio’s near fanatical commitment to excellence and innovation has received global recognition and acclaim. When we launched our R352MD loudspeaker - the first model to incorporate a metal dome tweeter - it caused quite a stir. Until that time, most metal domes were single-metal types made from copper or titanium and virtually all sounded unconvincing. The R352 used an aluminium/magnesium alloy dome and sounded significantly better and smoother than all of its
single-metal rivals. This radical design formed the blueprint for successive generations of our C-CAM metal domes.
All the radiating surfaces of the Platinum drivers are formed from C-CAM, a material originally developed by the aerospace industry for jet engine components. Its properties are ideal for loudspeaker cones: extremely rigid, yet light enough to yield high overall efficiency. In manufacture, aluminium/magnesium alloy undergoes stress-relieving processes 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 give a completely rigid exterior. Conventional cone materials 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.
- Platinum C-CAM high frequency ribbon transducer.
A pure ribbon tweeter is highly regarded in the world of high-end audio as being the best way to reproduce ultra-high frequencies and provide the most lifelike transient response. While this belief is well supported by fundamental physics, one listen will tell you that this driver is very special indeed.
Platinum’s ribbon tweeter design uses an ultra-thin sandwich of C-CAM alloy suspended in a powerful transverse magnetic field of high energy NeFeB rare earth magnets. The ribbon serves as both voice coil and radiating diaphragm, with every part of the ribbon driven directly and simultaneously without energy storage. Having a mass of just 18mg, its diaphragm is able to start and stop in an instant, producing a transient response capable of defining the leading edge and natural harmonic resonance of complex musical sounds. Specified to reach ultra-high frequencies up to an elusive 100 kHz, Platinum’s magical ribbon tweeter will reproduce with ease every last nuance and detail from vinyl, CD, DVD-A and SACD, together with the wider bandwidth of HD-DVD and Blu-ray.
- Rigid Diaphragm Technology (RDT®) mid-range and bass drivers
Bass and mid-range driver cones use RDT, 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 40μm thick, the C-CAM skins are half the thickness of a human hair, yet when bonded to the hexagonal honeycomb core they form an RDT cone, which is 150 times more rigid than a single layer of 200μm 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 cone’s
new concave geometry has been refined by FEA analysis to provide a smooth frequency response and eradicate break-up.
To optimise the performance of the RDT cone, Monitor Audio has developed motor systems in which a focused magnetic gap and copper eddy rings work together to produce a higher level of linearity and lower distortion than was previously possible. Magnet plates and poles are CNC machined to very precise standards, ensuring consistency.
The Platinum mid-range driver utilises an ‘under hung’ voice coil design to further optimise linearity and reduce distortion. High energy NeFeB rare earth magnets are used for high efficiency, and a large 2” (50mm) voice coil is specified to handle powerful
dynamic impulses. Its RDT cone is driven directly by the voice coil to provide an extremely articulate mid-range response and seamless integration with the other drivers.
Platinum’s bass drivers use long-throw voice coil windings for long excursions at high power levels, giving deeper, more controlled and potent bass. The larger 8” (200mm) drivers employ dual spider arrangements for extra stability. Their direct-drive RDT cones have no dust cap or joints to interfere with the driver response over the working band.
* PLW-15’s driver is C-CAM only
** Nomex® is a registered trademark of E.I DuPont de Nemours and Company
- Anti-Resonance Composite (ARC) baffles, plinths and mid-range driver housings
The front baffles, plinths and mid-range driver housings for the Platinum series of loudspeakers are cast from ARC material, a thermo-set polymer loaded with minerals to provide very inert, optimally-damped components. Refined for Platinum by Monitor Audio’s engineers, this type of material is used for leading-edge automotive design and is ideal for acoustic applications where a high degree of structural rigidity and vibration damping is required. ARC material is cast to form a Tapered Line Enclosure (TLE) for Platinum’s mid-range drivers. The TLE is designed to prevent the propagation of
standing waves and modal resonances.
- HiVe® II High Velocity reflex port
Platinum employs a new type of port technology, which uses a straight rifled design to accelerate air flow and reduce turbulence. HiVe II technology has the ability to move air in and out of the cabinet more quickly than a conventional port, bringing powerful bass and a superior transient response.
- Cabinet construction
The cabinets are constructed from multiple layers of bonded MDF, forming an extremely rigid multi curved shell, hand finished in a choice of lustrous exotic wood veneer or piano black gloss. Internally, the sides are non-regular, preventing the formation of standing waves, which undermine the accuracy of the system. Monitor Audio has developed a unique ‘pin-hole’ bracing structure for the Platinum series, positioned to provide rigidity and integrity. Cabinet bracing is further enhanced by steel bolts that tie front and back panels to the ‘pin-hole’ brace and are tightened to a specific torque in order to tune out undesirable resonances. Bitumastic damping material is applied to all internal cabinet walls to produce a heightened level of resonance damping.
- Every last detail
WBT* Platinum signature Binding Posts are considered to be of the highest quality available. Precisionmachined and plated with pure platinum, they offer a very low contact resistance and the best possible reliability. Featuring accurate fine-pitch adjustment, the terminals are suitable for heavy duty cables with spade, 4mm plug or bare wire connections.
To provide a secure contact with the floor, adjustable spiked feet are used. Machined to the finest tolerances from high-grade alloy and anodised to the most exacting standards, the feet accept ‘bullet’ spikes of high-tensile steel, chrome-plated to a mirror finish. For hard or solid wood flooring, a non-slip rubber pad is integrated with the foot design.
* WBT Trademark of WBT GMbh, Germany
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