The RS-3318 is a single 18 in powerful subwoofer with enhanced low-frequency performance and high and fidelity extended output. The low frequency response can reach 35Hz. And the enclosure with four handles (two handles each side). It is very convenient for you to carry it or install it. In addition, it is only 45kg. it is very easy for you to move it. It is the best choice for disco club installation or touring performance. Application Installation for Large or medium disco club, beer bar or coffee bar with dancing hall. the RS-3315 or RS-3312 Touring live show with the RS-3315 or RS-3312 Main PA reinforcement for large or medium venue Features It is very light weight of 45kg for you to move it or use it as touring cabinet. With RMS power handling of 500W/8ohms can give you the power you need. The cabinet is made of 18mm ply-wood. It is compact and vented. It is covered by the stainless steel. With one whole for you to stand the full range speaker or tweeter. Two Speakon NL 4MP connector for you to use a pair of RS-3315 in parallel into 4ohms.