Massive Audio GTR Series 8" Subwoofer Bass: 0dB to +18dB @

Bass: 0dB to +18dB @ 45Hz

these speakers are designed to fit behind factory grilles or panels in most applications

or channels 3&4

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

With the added flexibility of an auxiliary input

Massive Audio GTR Series 8" Subwoofer Bass: 0dB to +18dB @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