Rockville RVB12.1A 12 Inch 500W Active Powered Car Subwoofer+Sub Enclosure Box Rockville RBV12.1A Single 12&quot; 500 Watts Active Subwoofer Enclosure. Size: 12&quot;. Peak Power: 500 Watts. RMS Power: 300 Watts. Nominal Impedance: Single 4-Ohm. 2&quot; Voice Coil. Inverted Carbon Graphite Molded Dust Cap. Kevlar Reinforced Pulp Cone. Matte Black Custom Molded Grill. Double Laminated Foam Surround, Stitched to Cone. Frequency Response: 30Hz - 150Hz. Sensitivity: 93dB. Anti-Vibration Braced MDF Cabinet. Hatchback Style, Angled Back Fits Perfectly Against Rear Seats. Computer Tuned Bass Reflex Port. Blue/Black Aviation Grade Tweed Carpet with Embroidered Rockville Logo. Class AB Amplifier. High Speed MOSFET Power Supply. High Level Speaker Inputs. Low Level RCA Inputs. Built-In Low Pass Crossover (30Hz - 150Hz). Accepts up to 8 Gauge Wire. 100mV - 5V Input Voltage. Power (Blue) &amp; Diagnostic (Red) LED Indicators. 20A Fuse. Dimensions (H x W x D): 17&quot; x 14.75&quot; x 15.25&quot;.