Subwoofer-Speaker Dust Caps protect the voice coil gap from dust, debris, and environmental damage. They also influence cone stiffness, airflow, and sometimes high-frequency response. We stock caps in various materials — aluminum, cloth, pulp paper, and composites — each with specific acoustic and thermal properties. Matching cap size to your cone diameter, former type, and mounting depth matters: heavy or poorly-fitted caps can degrade transient response or introduce cone flex under load. Choose caps built for precision finish and long-term sound integrity.