The MR4 has a svelte cabinet profile, housing potent 6.5” bass and bass/mid-range driver designs in a 21/2-way system of dedicated driver chambers, reinforced by comprehensive cabinet bracing to provide a remarkable blend of punch, deep bass extension and control. Overall frequency response is typically flat and this neutral balance is augmented by an extended, well-defined bass performance. The floor-level mounted terminal panel allows for easy access and avoids unnecessary trailing cable lengths.
Features
Frequency Response: 36Hz - 30kHz
Sensitivity (1W@1M): 91 dB
Nominal Impedance: 6 ohms
Power Handling (RMS): 150 W
Recommended Amplifier Requirements (RMS): 30-120W
Bass Alignment: Bass reflex. Ported front and rear.
Drive Unit Compliment: 1 x 6.5" MMP®II bass/mid-range
1 x 1" gold dome C-CAM® Tweeter
External Dimensions incl Plinth (H x W x D)
850 x 185 x 255 mm
(33 7/16 x 7 5/16 x 10 1/16 inch)
Weight (each): 12 Kg (26.4 lbs)
Technology
C-CAM Drivers
Ceramic-Coated Aluminium/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, aluminium/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. 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.
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.