Selling a great set of Yorkville 18" subwoofers. These are nice, sturdy subs that can really fill a room with bass. They are in great working condition and can take either 1/4" or speakon cables. Specifications: -18" Woofers -Power rating: 400 Watts -Impedance: 6ohms -Frequency response: 45hz-150hz -Crossover frequency: 150hz -Sensitivity: 98db (1 watt @ 1 meter) -Max SPL: 124db -2 1/4" inputs -2 Speakon inputs -Built-in speaker stand mounts