The JBL 2226 driver is best used from 40Hz up. For use below 40Hz, I suggest either trading or selling the Model 14's or the 2226's and getting something like JBL 2245's instead. Put them in PiAlign'ed 10 cubic foot cabinets. There were several 2245's in that tent sale, and you may be able to find some good deals from individuals who have decided it's too much box for their homes.If you choose to build some π speakers and want plans, please don't hesitate to write back.