The Yamaha DZR15 is loaded with great-sounding, custom-designed transducers. Its high-frequency transducer includes a 2-inch voice coil and 1-inch throat compression driver, a titanium diaphragm, and neodymium magnet housed in a heat-resistant aluminum-cast frame. Its low-frequency transducer uses a large 3-inch voice coil, cast-aluminum frame, and powerful, yet lightweight, neodymium magnet to handle the chest-thumping low end that the DZR15 delivers. The DZR15 isn’t just all about power, however. Its low-end response is tightly controlled, especially in the mid-bass and vocal range, assuring crystal-clear sound reproduction — even at cranked volumes.