A friend mentioned that his speakers had lost their surrounds and he couldn't listen to them anymore. I loaned him a pair and told him I'd fix his old ones.
Turns out these are old Radio Shack 15" with horn two ways. The crossover amounted to a bobbin coil and an electrolytic cap. Big mostly empty box wired with probably 22 ga and push on connectors. Looks like 5/8" particle board. What a true turd. I just pulled carpet out a bedroom, so I lined the cabinets with old carpet padding.
One refoam went smooth, and the other was a pain in the butt. Did it 3 times because I couldn't get it centered, even after cutting out the dust cap in using shims. Finally got it. Going to birthday gathering where he'll be there, and I can get these things out of my house. And of course, I cut the crap out of my thumb on it.
Wow, Radio Shack really didn't even bother back in the day. Hey, it's got 15" woofers so it must be good.