My previous headphones were Equation RP-15, but were replaced with RP-21 when the yoke(?) developed a crack around the time Equation debuted it. Several years later, the RP-21 split in exactly the same spot. These headphones were babied, always unplugged before removed and placed in a safe spot, and left the room only once - in a box that was never unpacked. After years of trouble-free use, it split unexpectedly upon taking them off. To add to the misfortune, Equation cannot replace them because they are back ordered for several weeks. Considering this problem occurred twice, I am seriously doubting the wisdom of using a headphone that uses plastic at a stress point.
