DESC: Boss Audio D12F 12-inch 4-ohm flat subwoofer is made to make your in-vehicle audio system growl with all of the lows and vibrate your sternum as the bass beats of your music fill the air. Low profile with high tech that can't be beat. Low frequency sound reproduction is the first thing you notice when you hear a system. DIABLO subwoofers feature a heavy duty poly injection cone and rubber surround to create bass that will make sure you and your music get noticed.