It's a good horn driver for horns with a relatively large chamber. However the Mms is fairly low for an 18" and efficiency is very high, so I suspect it's a rather low Xmax driver. I wouldn't aim at very low frequencies and set the high pass at 40 - 50 Hz.
It will work in Cubo 18 Standard/ Extended. For a front loaded horn I would look into horns with a relatively large rear chamber, like the 186 horn, WSX or USB. For the front loaded horns I would use stacks of 2 - 4 cabinets, mono stack if necessary,