Question about speaker design.

[gibhunter 10+ year member]

It seems to me like a couple of years ago the top speakers and subs had plastic or some metal alloy surface. Now I see the trend going back towards fabric/glue etc. with the cheaper speakers getting the plastic or metal alloy surface. Is there a reason this happened? Is it a fad or is the fabric (I presume it's some type of kevlar) simply a stronger and lighter alternative?

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[SilverJLEclipse 10+ year member]

these materials are used because of their accoustic characteristics (think about drum skins) as well as weight and strength properties. plastic was used because it made speakers durable which is needed because of the harsh automotive environment. speakers today are coated with treatments that help with durability while not "coloring" the music like plastic can.