The only advantage to a voigt pipe appears to be its simplicity - it's very easy to build one. In contrast, all the back loaded horn enclosure plans I have seen for the FE-166 and 206 would require some woodworking skills and seem to be very labor intensive. I was wondering if there's a simpler plan, possibly like the BK-16 folded horn that Madisound offers as a flat pack kit for $98?