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| EAW Patented Radial Phase Plug™ Technology The distance from a cone transducer's voice coil to its dustcap is shorter than the distance from the voice coil to either the cone or edge surround. Therefore, the energy radiating from the dustcap will lead the energy from the rest of the transducer. Traditional phase plug designs have isolated this energy and routed it through a longer path instead of integrating the energy from the cone or edge surround. In the process, this kind of phase plug fails in its attempts to equalize the time arrival differences because of the circular phase plug entrances and exits. The primary reason is a loss of control over the direction of energy. By using a circular phase plug slots, a dramatic narrowing of beamwidth can occur as the frequency increases. Thus, the directivity narrows to the point where it no longer fills the mouth of the horn, leaving holes in the upper midrange frequency response, primarily in the seams between loudspeakers in an array. The EAW patented Radial Phase Plug™ attacks the problem at the source by precisely aligning the transducers cone, dust cap, and edge surround geometry to maintain temporal unity. The phase plug utilizes expanding radial slots within a compressing frame. The radial design lowers the mechanical reactance of the air load facing the transducer without modifying its directivity. This combination of elements provide faithful reproduction of upper midrange without narrowing the beamwidth or producing temporal smearing. The results are astounding vocal reproduction. |
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Products that utilize this technology: |
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