The Akai SW-120 is a vintage subwoofer that was manufactured by Akai in the past. It is a passive subwoofer, meaning it requires an external amplifier to power it. The SW-120 is designed to enhance low-frequency sound reproduction and provide deep bass. It typically features a 12-inch driver and has a power handling capacity of around 120 watts. The subwoofer may have various input and output connectors to facilitate connectivity with audio systems. However, further specific details regarding its specifications, production dates, or availability are not provided.