4.5" 115mm Speaker Foam Surround Edge – Woofer Repair Kit

Restore Your Speaker's Sound with a Precision-Fit Foam Surround

Bring your aging or damaged woofer back to life with this 4.5-inch (115mm) Universal Speaker Foam Surround Edge. Designed as a direct replacement for deteriorated or crumbling foam surrounds, this repair kit component lets you restore full, rich stereo audio without replacing the entire speaker. Compatible with most standard 4.5-inch woofers in car audio systems, home stereos, bookshelf speakers, and more.

Key Specifications

• Name: 4.5-Inch Speaker Foam Surround Edge
• Material: High-Quality Acoustic Foam
• Outside Diameter: 115mm ±2%
• Inside Diameter: 74mm ±2%
• Convex Outside Diameter: 103mm ±2%
• Convex Inside Diameter: 85mm ±2%
• Package Includes: 1× 4.5-Inch Speaker Foam Surround
• Made in: Mainland China

Why Replace Your Speaker Foam Surround?

Over time, the foam surround on a speaker cone breaks down due to age, humidity, and environmental exposure. A degraded surround causes distorted audio, rattling, and reduced bass response. Replacing just the foam surround is a cost-effective way to restore your speaker to near-original performance — and this universal foam edge makes the job straightforward even for DIY beginners.

Step-by-Step Installation Guide

1. Remove the gasket and carefully rub off all old foam residue from the speaker frame and cone.
2. Apply contact cement (not included) to both the cone edge and the new foam surround's inner lip.
3. Center the new surround evenly as you place it onto the cone.
4. Press the inside of the surround to the cone — place your thumb on top and your index finger underneath the surround — and work your way around until the bond is secure.
5. Apply Elmer's wood glue (or equivalent) to the outer frame and press the outer edge of the surround down firmly.
6. Re-glue the gasket over the outer surround to finish the repair.
7. Allow adhesive to cure fully before testing your speaker.

Note: Please allow 1–5mm deviation due to manual measurement. Always measure your existing surround before ordering to confirm compatibility.

Compatible With

• Car audio woofers and door speakers
• Home stereo and bookshelf speakers
• Subwoofer repair projects
• Any standard 4.5-inch (115mm OD) speaker driver

Related Products You May Need

• 1.5M Nylon Braided 3.5mm AUX Audio Cable | Car, Phone & Speaker
• 1.5L Electric Foam Sprayer – Portable High-Pressure Car Wash Gun

Further Reading

For general consumer product safety tips and guidance on electronic component repairs, visit the U.S. Consumer Product Safety Commission (CPSC).

Learn more: List of auto parts

Frequently Asked Questions

Q: What size speaker is this foam surround compatible with?

A: This foam surround is designed for 4.5-inch (115mm) speakers. The outside diameter is 115mm and the inside diameter is 74mm. Always measure your existing surround or speaker cone before purchasing to ensure a proper fit. A ±2% manufacturing tolerance applies.

Q: What glue do I need to install this speaker foam surround?

A: You will need contact cement to bond the inner edge of the surround to the speaker cone, and Elmer's wood glue (or a similar PVA-type adhesive) to attach the outer edge to the speaker frame. Neither adhesive is included — they are available at most hardware or craft stores.

Q: Will this surround work on both car and home speakers?

A: Yes. This is a universal 4.5-inch foam surround suitable for car audio speakers, home stereo woofers, bookshelf speakers, and other standard 4.5-inch driver applications, provided the dimensions match your existing speaker.

Q: How do I know when my speaker foam surround needs replacing?

A: Common signs include visible cracks, crumbling, or holes in the foam ring around the speaker cone, distorted or muffled audio output, rattling at certain frequencies, or a cone that moves unevenly. Replacing the surround promptly can restore clear, balanced audio performance.