JBL Northridge E250P 12-Inch Powered Subwoofer with 250-Watt Digital Amplifier, Single (Black Ash) (Discontinued by Manufacturer) 12-inch low-frequency PolyPlas woofer FreeFlow flared port prevents distortion High-output 250-watt amplifier; 550 watts peak dynamic power Line level and speaker level inputs with 5-way gold-plated binding posts Measures 14-3/8 x 19-3/4 x 16-1/2 inches (W x H x D)