Big, bad, bodacious.
The Nady PSW18 Subwoofer is a 600W, 18" speaker with 2" voice coil and 50 oz. magnet. It cranks out bottom end that will blow out your windows. Durable black carpet cover; reinforced corners; plus binding post, banana jack, and 2 - 1/4" inputs make it perfect for any configuration and road ready. Handles 300W RMS, 600W peak. The Nady PSW18 Subwoofer offers 20 to 400Hz frequency response.
Put it in the cart, but don't turn it on till you get it home.