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I have always wanted to build a retro monkey coffin style speaker after owning a pair of 70's Sansuis as a kid. I wanted something
where the speaker had a retro flush mounted grill that could be listened to with the grill on. So in this build I have tried a few tricks to limit diffraction on a basically terible design. I used a waveguide on the tweeter, and also made the grill into somewhat of a waveguide itself. I used the XT25 beastmode tweeter and HiVi L6-4R which I had laying around. I wanted the dimensions to be about the same as the Sansui SP-2500 which was similar to what I had as a kid. That gave me about 1.7 cubic feet for the woofer. I chose the Dayton Audio RS270p-4A. It will do about 35hz in that box with a decent sensitivity. I picked a vintage grill cloth from Parts Express and have built one speaker far enough to get some measurements and cobble together a crossover.