11" Spare Tire Passive Subwoofer With 600 Watts RMS Power Handling & 1200 Watts Max, Maximum Bass With Maximum Space Saving, Engineered To Deliver Fast & Tight, Deep Bass With Low Distortion, 2.5" Dual 4 Ohm Voice Coil, 20Hz - 150Hz, 14-3/16" x 6-1/2"