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OUR 21-INCH BIG POWER SUBWOOFER

SPECIALLY MADE  PAPER CONE The 21-inch usually uses imported black paint corrugated paper cones. Using this paper cone can make the sound smooth, natural, bright, and clear. The rigidity of this kind of paper cone is very good to reach the high transient response and shows more listening details obviously. In that case, it’s easier

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Is there a difference between the two different double voice coil winding methods

What is the double voice coil Double voice coil. It uses two unconnected wires wrapped around the same circle of the skeleton, and their endpoints are independent of each other. In general, these two wires have the same number of turns and lengths, therefore they have the same characteristics. The specific winding method is to

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