Not too long ago, my Dad—who's basically the DIY Audio version of MacGyver—popped by for a visit. We ended up chatting about his latest obsession: the RiPol woofer. Now, my dad’s built more speaker boxes than I've had hot dinners, but the design he showed me looked like something out of a NASA blueprint. After a few days of design wizardry, we cooked up a plan for a dual RiPol with snazzy removable cartridges, making it a breeze for quick assembly and woofer swap-outs. I'm totally into making things user-friendly, so the main mission here is to create kits that audio geeks can whip together in a few hours. That way, they can spend more time geeking out over crossover points and less time lost in DIY purgatory.