Radius HD

R250HD

Your Speaker

The elegant R250HD has been designed to be sited vertically or horizontally with larger 50 and 60-inch LCD and plasma displays. Providing bass right down to 50 Hz, it can be used as a centre, main, side or rear speaker in a multi-channel music or movie system. At just 105mm (4 1/4”) deep and in a choice of luxury black, white or silver lacquers, its suitability for flat screen applications or where space is at a premium is beyond dispute. The R250HD employs the R225HD’s driver configuration in a longer cabinet and extra port providing the enhanced bass performance that makes it a desirable space efficient hi-fi satellite for any room.

Features

  • Wall mounted system for use with LCD/Plasma displays.
  • 2 x 4" MMP®II. The Metal Matrix Polymer drivers have been completely re-worked and re-modelled with the aid of new design and simulation tools to achieve higher sensitivity and increased magnetic linearity. The new shaped T-section pole and focussed magnetic gap produces better linearity and lower distortion, resulting in fast punchy bass. All drivers are dedicated and model specific, with each model in the Radius HD series being designed and voiced individually.
  • 1" Gold C-CAM® tweeter providing extension to in excess of 35 KHz ensuring the wide frequency bandwidth of HD music and cinema formats can be replayed faithfully.
  • D’Appolitto driver array provides good dispersion and fantastic mid-band clarity and presence.
  • Magnetically shielded drivers allow Radius HD to be safely used near sensitive microprocessor equipment or plasma/LCD displays.
  • High quality crossover uses high-grade metalised Polypropylene capacitors for increased clarity. High-grade air core and laminated iron core inductors give lowest possible distortion and low insertion losses.
  • Specially developed high grade PCOFC internal cable is used throughout to ensure maximum signal transfer at all frequencies and low signal resistance.
  • Single through-bolt driver fixing provides mechanical de-coupling and enhanced mid-band clarity and resolution. The through-bolts also act as rigid cross bracing to give a very solid non-resonant cabinet.
  • Front-ported reflex design.
  • Internal PTC auto-reset protection circuit to prevent over-driving.
  • ARC® front baffle (Anti-Resonance Composite). Originally developed for our high-end Platinum series, ARC is a cast thermo-set polymer loaded with minerals to provide very inert, optimally damped components. It is ideal for high-end acoustic applications where a high degree of structural rigidity and vibration damping is required.
  • Flush fitting grille with rotate-able ‘m’ logo for positioning in Landscape or portrait orientation.
  • A specially designed die-cast metal wall bracket is supplied, providing easy install and adjustment for wall positioning.
  • Full length oval perforated grilles supplied in black and silver can be customised to suit individual décor and taste.

Specification

ItemValue
Frequency Response: 50 Hz - 35 KHz
Sensitivity (1W@1m): 90 dB
Nominal Impedance: 8 Ohms
Power Handling Single (RMS): 100 W
System Power Handling (RMS): 150 W
Recommended Amplifier Requirements: 20 - 150 W
Maximum SPL (dBA): 108
Bass Alignment: Front ported
Drive Unit Complement: 2 x 100mm (4") MMP®II cone mid-bass driver.
1 x 25mm (1") C-CAM® gold dome tweeter
External Dimensions
(H x W x D): mm (inches)
760 x 125 x 105 mm
(29 15/16 x 4 15/16 x 4 1/8)
Weight (each):
Kg (lbs)
5.2 (11 1/2)

Finishes

  • High Gloss Silver LacquerHigh Gloss Silver Lacquer
  • Piano Black LacquerPiano Black Lacquer
  • Piano White LacquerPiano White Lacquer

Technology

Gold Dome C-CAM®

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.

MMP® II

MMP® II

Metal Matrix Polymer driver cones have a polypropylene base loaded with metallic particles to offer a rigid and responsive structure. They are manufactured using a sophisticated high-pressure injection process, which modulates cone thickness at critical points to optimise stiffness and consistency, resulting in a superior sonic performance.

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