The speaker should be using electrostatic drivers, I suppose. But then again, it's only power is either from the Li-ion battery or USB power. I'm actually interested in a 3D printer because... me and another local head-fier is actually in the process of making a full scale T50RP mod. Everything new, from cups to headband and baffle and all. The only constant is the driver. Sure there's 3D print services around, but having one of my own actually is appealing more than just this project. Oh and since it's $100 CAD it's slightly cheaper than $100 USD.