Subwoofer Voice Coil Shim Adapter

Subwoofer Voice Coil Shim Adapter

Get factory-level coil alignment using the same shim tool trusted by professional speaker manufacturers. Our precision shim adapter makes subwoofer recones faster, easier, and more accurate than using paper or plastic strips. It helps eliminate misalignment and reduces the risk of coil rub, gap damage, or recone failure caused by poor centering during installation.

This subwoofer voice coil shim is designed for voice coils with a 3″ (76.2mm) inner diameter and motors with a 2.95″ (75mm outer diameter pole piece. The tight fit keeps the coil centered in the gap during assembly. It maintains even spacing throughout the glue-up and curing process. That means smoother movement, better durability, and fewer build issues with every recone or speaker repair project, regardless of size or volume.

Made from a high-strength composite, this shim has a smooth, non-stick surface for clean and easy removal every time. It won’t warp, compress, or bond to adhesives. It holds its shape under pressure and stands up to repeated use. The rigid structure makes it easy to handle during both installation and removal. Unlike makeshift materials, it delivers consistent, professional-grade results that hold up over time with minimal effort.

We recommend this shim for voice coil formers up to 5.5″ tall. It also works with taller coils if needed. However, removal may require extra effort due to increased contact. This is expected and does not affect fit or function. The shim is reusable and maintains its shape and precision across multiple builds without failure or performance loss.

Perfect for recone kits, subwoofer builders, speaker repair shops, mobile audio installs, and home audio restoration. Builders, technicians, and installers all benefit from using it in their daily workflow and service routines.

Upgrade your recone process with the tool trusted by professionals. Built for precision, reliability, and repeatable results you can count on every time.