home theater

Replacing the foam speaker surround on my JBL speakers

About ten years ago, I bought a pair of used JBL J520m bookshelf speakers. They have nice, wood cabinets, a great-sounding woofer and tweeter, and a classic look (they don't really look dated, like 90% of 80s and 90s-era speakers).

JBL J520m speaker wall mounted with grill cover next to TV
Doesn't it look stately?

Whenever you buy used speakers, you should check the woofer cone and foam surround, as these are usually the first parts to deteriorate and cause terrible distortion in certain situations. In my case, the speakers had been stored in someone's garage for a few years, so I knew the foam wouldn't last long. When purchased, the foam flexed okay, but this year I noticed both speakers started making funny noises during explosions or low bass notes during movie and music playback.