(1)MDF speaker (2)full range,subwoofer (3)fine appearance (4)High-quality workmanship (5)OEM ... -825,single 12inch/single 15inch/double 12inch/double 15inch full range passive wooden speaker2\ SYX-818,SYX-828,single 18inch subwoofer ... ,double 18 inch subwoofer.SYX-800 series full range passive wooden speaker Peci fication SpecificationsSYX-812SYX-815WOOFER12''15''Power ...