High Order Quarterwave Society (DIY Paraflex development community) | Hi everyone, I have 2 CUBO 18 Extended cabinets with faital pro 18hp1060 drivers. | Facebook
CUBO 15" EXTRA EXTENDED | BOX SPEAKER SUBWOOFER SINGLE 15 INCH - YouTube
My DIY 15" tapped horn subs (credit to Cubo for the design) : r/DIYGear