Massive Audio GTR Series 12" Subwoofer closeout Frequency Response: 45 Hz -

Frequency Response: 45 Hz - 20 kHz

9" / 150mm

generates less heat and draws less power than traditional Class A/B amps

JBL puts these subs through a rigid testing process that includes baking

Massive Audio GTR Series 12" Subwoofer closeout Frequency Response: 45 Hz -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 120oz 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