Realistic, Optimus, Radio Shack 5" Foam Repair Kit

Technical Specifications & Sizing

Repair Kit Contents

Speaker Compatibility & Fitment Guide

This premium 5-inch foam surround repair kit (Model 5F#1) is engineered to fit an extensive catalog of vintage loudspeakers, multi-element monitors, and dedicated midrange drivers produced across the iconic Radio Shack, Optimus, and Realistic audio lines.

Replacing deteriorated original foam stops voice coil distortion, centers the cone assembly, and completely restores the legendary warmth and midrange response these classic systems are known for.

Mach & Pro Series Midrange Transducers

Specially sized to replace the fragile factory midrange surrounds found in large vintage multi-way cabinets:

• Midrange Applications: Mach 2 Midrange, Mach Two Midrange, Pro 4000 Midrange

Pro, LX & Compact Monitor Series

Fits high-fidelity bookshelf enclosures, multimedia speakers, and satellite audio monitors:

• Models: Pro X88, PRO X55AV, PRO-X880AV, LX511, LS3, CS5, C53

Numbered Loudspeaker & Cabinet Models

• Systems: T120, 400, 650, 660, 950, 1000, 1218, 1260, 1261, 1265, 1290, 1296

Factory Driver & Production Stamped Codes

If the rear magnet structure or steel basket of your 5-inch speaker is stamped with any of these engineering reference numbers, this kit is a perfect fit:

• Component Codes: 12110, 12126, 12128, 12134, 12135, SP0152

Radio Shack 40-Series Catalog Numbers

An exact replacement for drivers cataloged under Radio Shack's standard parts and system distribution network:

• Catalog References: 40-285, 40-1130, 40-2042, 40-2047, 40-2082, 40-2084, 40-4065, 40-4078, 40-5003, 40-5007, 40-5011, 40-5035, 40-5036, 40-5037, 40-5038

💬 If your model is not listed above, it doesn't mean it won't fit — drop us a message and we'll gladly check it for you!