4.5-inch body tapers to 4-inch round at the front4.5-inch machined aluminum, thin-line tip3-inch high-flow core for superior performanceAcoustical engineering developments allow an incredibly deep sound because of intense, class-leading resonance absorption and preventionUses proprietary materials with specific acoustical dampening and thermal insulation propertiesThe frequency and location of the perforation patterns in the cores creates significant sound scattering in the mid frequencies, which helps to enhance the low frequency tones