Removed from a vehicle in working condition. No cables are supplied. You get what you see in the picture. The STA-8 features a Class A/B mono amplifier perfectly matched to power the 8-inch woofer in its vented enclosure design. We developed a compact trapezoid shaped enclosure, perfectly tuned to get the most out of the proprietary 8-inch subwoofer. The geometric design maximises transient response, reducing the negative effects that a small enclosure can have on the subwoofer by dispersing and dissipating standing waves away from the subwoofer and result is cleaner, deeper bass in less space. STA-8 Amplified Sub Enclosure: Aluminium enclosure with a lighted logo badge all CAD (Computer Aided Design) for maximum output in small spaces 8-inch Polypropylene Woofer with 40 oz ferrite magnet and pole venting 150 watts RMS Mono Amplifier (300 watts Peak Music Power) featuring variable Gain, Low Pass and Bass EQ High / Low Input Compatible with OEM or aftermarket radios. Single 8 150 Watt RMS Amplified Under Seat Subwoofer Enclosure. Extruded Aluminum Enclosure with Dynamic Damping. 8 Injection Molded PP Cone Woofer. 1.5 KSV Voice Coil Former. 1-Channel 150 Watt High Efficiency Class A/B Design. High Level (Speaker)/Low Level (RCA) Input. Soft Delay Turn On/Off Circuit. Auto Turn-on (high level input only). Variable Low Pass Electronic Crossover. Protection Circuit: Impedance Over-load, Speaker Short, Circuit, Thermal Overheating, and DC Output. Variable Wired Remote Gain Control Included. Width: 9.75 (25cm). Height: 2.75 (7cm). Length: 13.5 (34.5cm).