Tweet
In the context of loudspeaker drivers, the spider refers to a component that plays an important role in the suspension system of the driver. The spider is an essential part of the driver's overall mechanical structure, helping to center and control the movement of the voice coil and diaphragm within the magnetic gap. The spider is typically located between the voice coil and the frame (basket) of the loudspeaker driver. It is made of a flexible material, such as cloth or treated paper, with a corrugated or pleated design. The spider is attached to the voice coil former at its inner end and to the driver's frame at its outer end. There are several primary functions of the spider:
- Centering the Voice Coil: The spider's flexibility allows it to exert a restoring force on the voice coil, keeping it centered within the magnetic gap. This centering is crucial for maintaining proper alignment and reducing unwanted rubbing or scraping of the voice coil against the magnetic structure, especially during large excursions.
- Suspending the Diaphragm: The spider provides a flexible and compliant suspension system for the diaphragm (cone) of the loudspeaker driver. It allows the diaphragm to move back and forth in response to the electrical audio signal while maintaining control over its motion.
- Supporting Mechanical Stability: The spider's design and material contribute to the mechanical stability of the loudspeaker driver. It helps prevent the voice coil from tilting or misaligning during operation, ensuring that it moves linearly within the magnetic gap.
- Controlling Mechanical Q Factor: The mechanical properties of the spider, such as its stiffness and compliance, affect the driver's mechanical Q factor. The Q factor is a measure of how efficiently the driver dissipates energy as mechanical vibrations. The spider's design can be tuned to optimize the driver's performance for specific applications.
Main Page