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Reference Audio
Starting Member
41 Posts |
 Posted - 2005/11/16 : 19:58:10
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9-10/12 kommer Lars-Olov från Infinity och spelar på den nya Cascade serien.
Missa inte dessa högtlare.
http://www.ref.se/imageupload/infinity/cascade_series_brochure.pdf
MAXIMUM RADIATING SURFACES
Evolution of the MRS™ Transducer
When Infinity Engineers set out to design their latest driver technology, they had two requirements in mind: the transducer needed to be thin, and it had to exhibit the same audio quality as conventional speaker cones.
There were many factors that influenced the decision to pursue a flat radiating diaphragm design. The primary advantage of the flat diaphragm was that it reduces the overall depth and mounting requirements of the transducer. (relative to a comparable conventional-cone driver)
The engineers at Infinity reviewed the strengths and weaknesses of several of their technologies to date. They combined the flat diaphragm of their EMIT driver technology with a variation on conventional loudspeaker motor technology.
Replacing the more familiar cone-shaped diaphragm with a flat diaphragm allowed them to significantly reduce the depth of the driver. The result is the Maximum Radiating Surface™ (MRS™) flat-panel transducer, which offers the audio quality of conventional loudspeakers, from a very slim driver.
Better Sounding and More Attractive
A further advantage to using a flat-panel diaphragm is that its rectangular shape maximizes the useful sound-radiating area on the front of the speaker enclosure. While most loudspeaker baffles are basically rectangular, the radiators mounted on them are circular.
This leaves a lot of "wasted," or dormant, space on the baffle which, while contributing to how big and boxy the speaker looks in your room, actually does very little to contribute useful sound. Maximizing the ratio of radiating surface area to baffle area allows higher levels of sonic performance from enclosures that do not dominate your room.
The Elliptical Voice Coil
The use of elliptically shaped voice coils allows for maximum contact area between the coils and the diaphragm, as well as placing more wire in the static
magnetic field. The unique, elliptically shaped voice coils used in each Infinity flat-panel transducer have a voice coil edge-to-diaphragm contact length of nearly 30 linear inches – more than 6x that of a typical cone transducer.
The combination of greatly improved diaphragm-to-motor coupling and use of our patented CMMD diaphragm ensures that the Infinity MRS driver functions more like a true flat piston. This results in crystal-clear sound and resonance-free operation throughout the operational range.
The advantages offered by our dual elliptical voice coils go beyond the diaphragm to include motor coupling. The dual elliptical design provides a greatly increased coil surface area over conventional designs. It is important to note that the surface area of a transducer’s voice coil is directly related to how much electrical power can be dissipated.
When power is applied to a transducer voice coil, heat is generated. Most consumer loudspeakers operate with electrical-to-acoustic efficiencies of less than 5%. This means that for every 100 watts of electrical power your amplifier produces, your speakers will dissipate 95 watts as heat. As a voice coil’s temperature increases, thermal compression sets in. As a result, the dynamic range capability of a speaker system is dramatically reduced.
Controlled Directivity
As with nearly all decisions related to loudspeaker design, each design choice
made for one parameter may influence other parameters. While choosing a
diaphragm shape that makes the speaker system's appearance more aesthetically pleasing is a good thing, it will often have consequences related to how the speaker sounds.
The shape of a loudspeaker cone or diaphragm is a major factor in defining the directional characteristics of a transducer. Putting a physics lecture aside, it can be simply stated that in most cases, at a given operating frequency, a smaller diaphragm will have a wider radiating pattern than a larger diaphragm.
Figure 1. Comparison of MRS transducers and conventional speaker cones.
This is one of the reasons why high-quality loudspeakers use multiple drivers (woofers, midranges and tweeters). A large-diameter woofer would not be suitable for mid or high-frequency use, due to its propensity to become too directional at these frequencies.
The aspect ratio of the Infinity MRS™ flat-panel diaphragm makes the diaphragm small with respect to width and larger with respect to height. While having the same radiating surface area of a round 6-1/2" woofer, the MRS driver has a horizontal radiating pattern, similar to a 3-1/2" midrange.
This contributes a very wide and smooth radiating pattern in the horizontal plane, providing exceptional imaging and soundstage presentation to listeners throughout the room.The height of the flat-panel transducer tends to project a narrow vertical radiating pattern into the listening room, which reduces the detrimental effects of floor and ceiling reflections.
The result is exceptional imaging and soundstage presentation across a large listening area, from a compact loudspeaker.
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Reference Audio - www.ref.se - Götgatan 35 - Stockholm- - tel 08-642 80 64 |
Edited by - Reference Audio on 2005/11/16 20:11:37 |
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