Alpine Electronics PWE-S8 Restyle Compact Powered 8-Inch Subwoofer 8-inch subwoofer and 120W amplifier, housed together in a cast aluminum enclosure The compact size measures just 13.5 L x 9 W x 3 D so it can be installed under or behind a seat in a truck, in a sedans trunk or in an SUVs hatch 32Hz-150Hz frequency response, Power Rating: 120W RMS. RCA (0.1-4V) / Speaker Input (1.5-30V/auto sensing) RCA and Auto-sensing Speaker Level Inputs are located on the side panel, along with controls for Phase, Gain, LP Crossover and Remote Sub Level The PWE-S8 is an Authorized Online Product Sold By and Shipped from Amazon; visit the store locator on the Alpine USA website for professional installation