Massive Audio GTR Series 8" Subwoofer or channels 3&4

or channels 3&4

2 Grille frames

Make and receive calls

What that means is your front 4 channels and the subwoofer signal are separated and individually controllable

even if you're keeping your car's factory radio

Massive Audio GTR Series 8" Subwoofer or channels 3&4All 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