... to the second one.It’s a powerful 10”woofer, suit for people who like the rock. This WRDwoofer is ... a upgrade of the WRS10” woofer:1,We use double magnet,2*40oz,magnet size is ... *20mm.2,We use the voice coil of 12”woofer to this 10” woofer.3,We use the America Du Pont materials, make ...