I browsed the tannoy website and it looks like they have taken a cross sectional picture of a kef uni-q driver from the blade speaker as a header picture for their ogive phase plug page
Ogive Phase Plug
that must be crazy criminal and stupid
Ogive Phase Plug
that must be crazy criminal and stupid
don't get caught up in a photo error as it would seem to be. This technology is most impressive and as I have found improves as the driver size get smaller (from 8" to 6" to 4"). The Revolution series XT Mini is said to be a 4" driver but cross diaphragm cone diametre is 3.25". This speaker is the king of the XT series with the most impressive focus stage and image due to its small woofer cone size along with a smaller compression driver diaphragm 0.75". They take several months to burn in and shine but when done they do not disappoint. Bass weight and depth is impressive for such a tiny loudspeaker. The XT Mini is not unlike the ProAc Super Tablette in it's magical ability to convince the listener that they are not missing any bass and that they do not require a sub. As Tannoy has said these are the most technically advanced and best performing DC design in the companies history. Stand and speaker to stand interface are critical in extracting the most these impressive loudspeakers can provide. I am now using the latest four post stands designed and manufactured by Skylan Stands of Calgary Alberta.
The KEF and Tannoy phase plugs are similar to the design concept used in the 1970's Motorola/CTS piezo tweeters, nothing too "brand new" in either..that must be crazy criminal and stupid
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