SOLD AS EACH All GTR Series subwoofers use dual tight red stitching thats sewn through a Textured Non-Pressed Pulp cone onto a Custom High Roll Foam surround. Then its bonded to a heavy gauge steel basket thats bolted to double stacked high flux Y30 65oz Strontium ferrite magnets. Then everything dances on a springy high-quality spider with high-grade woven tinsel leads that connect to a custom terminal case with flexible pure copper wire. These woofers scream sound quality and truly represent Massive Audio's commitment to value and performance.