Anti-Resonance Composite (ARC)
A cast thermo-set polymer loaded with minerals to provide very inert, optimally damped components. This material is
ideal for high-end acoustic applications where a high degree of structural rigidity and vibration damping is required.
ARC is used for mid-range housings and bae components. ARC is a unique material, developed specically by
Monitor Audio engineers for the Platinum II series. Its properties ensure energy is damped out and not emitted as
high-Q resonance.
Tapered line enclosure (TLE)
A tapered, parabolic-shaped enclosure cast from ARC material and designed to prevent the propagation of standing
waves and modal resonances. The tapered shape also has the eect of attenuating high frequencies: smaller waves
being suppressed with the use of graduated damping materials. TLE is a unique design developed specically by
Monitor Audio engineers for the Platinum series II.
Multi-layer Cabinet curved cabinet construction
Platinum II cabinets are hand built using multiple laminations of wood veneers and
shaped using complex curves to form a rigid shell. Curved surfaces are inherently
stronger than at surfaces. Since internal sides are non- regular curvatures, standing
waves (loosely dened as internal reections) cannot be set up.
New internal bracing structures have been developed to ensure the ultimate in
structural integrity, as well as serving to break up long acoustic paths internally.
Instead of large open spaces internally, we now have small, dedicated compartments
and chambers. This further reduced the prospect of standing waves, and is particularly
ecient at lower frequencies.
Bitumastic internal damping material is applied to all internal cabinet walls, ensuring
that any residual energy is damped out. The resulting homogenous enclosure is
supremely rigid, acoustically inert and able to deliver the sound as it was intended,
natural and uninhibited.
Individual Driver Grilles
Drivers are covered by individual grilles, designed to be acoustically transparent. The
system will therefore sound just as good whether the grilles are on or o.
Single bolt though driver
All Platinum II drivers feature a unique single bolt-through driver xing system. Each
driver is xed into to the cabinet from the rear using a long bolt tightened to a specic
torque setting during production. The bolt serves to provide the driver with an equal
clamping force around the periphery, whilst ensuring the motor system is braced.
Since this is eectively an additional form of bracing, the cabinet system with drivers
installed becomes even more rigid.
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