the box pro TP218/1600 MkIII Professional Subwoofer - 2x 18" speakers, 1600W AES (3200W peak), 100dB SPL (136dB max), 4 Ohms impedance, birch plywood enclosure, optional 100mm blue wheels available, 12x handles, 3-year warranty. Dimensions: 1200 x 550 x 680mm. Weight: 82kg. Colour: Black. Optional accessories, Optional matching M20 adapter bolts (199345).Optional cover 251600