Balanced Mode Radiator (BMR)In a conventional loudspeaker, the diaphragm – whatever its shape and means of motivation – is designed to act as a ‘piston’, at least over much of its operating range. It is intended to move as a rigid, coordinated whole to displace the air at its surface.
In contrast, a BMR is a modal loudspeaker, which uses prescribed panel shapes, where a limited number of bending resonances are harnessed. The two simple shapes which are used to exploit this technology are circular Audio Full Range (AFR) and high aspect ratio (HARP) speakers. The panel is built into a chassis, much like a traditional loudspeaker, with a voice coil, surround and spider, but the use of a flat panel makes the unit shallower. Application of BMR technology to AFR and HARP makes for a substantially flat, full-range on-axis frequency response combined with wide directivity.
Features and benefits of BMR technology - | | | | 1-BMR technology | - Flat on-axis frequency response | | | - Wide directivity even at high frequencies | | | - Extended bandwidth | | | - Room-filling sound | | | - Full-range drivers are possible | | | | | 2-Single diaphragm | - Approximates point source radiation | | | - Correct timing across the frequency range | | | - No crossover components | | | | | 3-Flat diaphragm | - Shallow profile | | | - Flexibility of mounting location | | | - No acoustic cavity effects (inherent in cones) | | | | | | | | | |
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