... , suit for people who like the rock. This WRDwoofer is a upgrade of the WRS10” woofer:1,We use double magnet,2*40oz,magnet ... is,134*60*20mm.2,We use the voice coil of 12”woofer to this 10” woofer.3,We use the America Du Pont materials, make ... a new mold, to produce the new tambur, because of the big power.It can make the tambur ...