From online images of the rear posts, no, these are not direct replacements. It's entirely possible they would fit, however. Pull the woofer if possible and check how the OEM posts connect to the crossover board. If they are not physically connected to the board (just via wire, rather than mounted through the PCB, which I've seen on similar speakers), and the length of this binding post will not run into important components, they will work. You may have to enlarge the stock binding post holes, and will likely have to solder the wires from xover to binding posts, but if you're comfortable doing that, it won't be a problem. Even wrapping the bare wire around the post's solder point isn't liable to lose connection, but solder is safer.