A thin disk, that vibrates in response to sound waves to produce electric signals, or that vibrates in response to electric signals to produce sound waves. The high quality diaphragms used in Accent Driver Units are specially shaped, reinforced phenolic diaphragms with a precision-wound voice coil on Aluminium bobbin for good heat dissipation. The rigid assembly offers high acoustic properties and is most indestructible in normal service. With it's self-centering design you requires little skill to replace the diaphragm.