Extreme 18 s Subwoofer,The kam extreme 18s subwoofer unit as its name suggests is extreme! This unit is capable of a massive 500 watt of deep powerful bass utilizing its massive 18" low frequency driver. It has an extremely tough 18mm plywood cabinet construction with injection moulded front panels for improved dispersion. The front grille is made of steel and the whole unit has a carpet finish to it. Coming with free speaker leads and carry covers this unit would be a great edition to any set-up. If you want ground-shaking bass at a quality price then look no further then the kam extreme 18s subwoofer.