Seas Excel loudspeakers

SEAS Excel drive units have been designed for the discerning listener who will accept nothing less than the very best. SEAS Excel drive units challenge the state of the art; combining world-class engineering with advanced materials and precise manufacturing techniques.
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The SEAS Magnesium cones are famous worldwide for their audiophile qualities.Behind this technology is a unique manufacturing process, which ensures high damping as well as the stiffness of a metal cone.Firstof all, the SEAS Magnesium cones are cast, not just a flat sheet that is punched into a certain shape. The castingensures that we achieve much higher damping in our magnesium cones than other magnesium products in the loudspeaker industry.Thekey is that the cast magnesium is an alloy with other constituents, whereas a flat sheet of magnesium suitable forpunching must be relatively pure magnesium and therefore will have low damping.Furthermore,the casting gives us geometric freedom to varythe thickness of the cones, such that they are made thickernear the center and thinner towards the outer edge. Although the cone might look like a straight conical shape to theeye, it's mechanical vibration behavior is not purely conical, but much better behaved, due to the thickness change.After casting, the cones are machined to reduce the overall thickness and the weight of each cone is measured, to ensurethe tightest possible tolerances, which can only be accomplished by machining.Hereafter each cone is surface coated to protect it from corroding, and it also looks much better.High damping magnesium is the best material for woofer cones because of itsdamping properties, light weight, combined with the good sound speed which stems from the stiffness-to-weight ratio. For woofer cones, the damping is of highest priority, even if itcompromisesstiffnessa bit, because the woofer cones have their early break-up modes inside the audible frequency range.Therefore, nothing beats a high-damping magnesium cone.At SEAS we have spent more than 5 years and more than a thousand engineering hours to
identify a better material than magnesium, maybe a composite could be the solution? but we return empty handed.Therefore, we decided to improve on the Magnesium Technology.