How to Repair a Cracked Speaker Cone.

I got inspired to make this indestructible a couple of days ago when I stumbled across a set of really nice set of audiobahn subwoofers at a yard sale. The only problem was that the speaker cones were badly cracked from the previous owner pushing to many watts through them.  I bought them, took them home, and discovered a cool trick to fixing the cracks which you are about to learn about.



Disclaimer!
Don't blame me if you break your broken speaker cones lol.
This wont properly work on metal or plastic cones.
This fix will likely not make your speakers sound better than they did before they cracked. It should however sound better than they did when they were cracked.

Step 1: Required Tools

Here is what you will need to fix your speaker.
Elmer's glue, gorilla glue (this stuff also works great for fixing cracks in speaker dust covers), or another type of semi flexible wood glue
A regular coffee filter.
A paint brush. I recommend a semi stiff bristled brush as it helps to rub the glue into the speaker cone
Scissors
A plate
and last but not least a broken speaker...Duh

Comments

[whulbert]

hi i have a 12 in subwoofer with a crack less then 1 inch can any one help

[rimar2000]

Good work!

At step 3 photo 5 you say "There is no fix for this kind of crack...": I fixed a badly broken speaker's rubber suspension, using silicone sealant and an old light fabric strip. It does not look pretty, but it is operational.

[coolpizzadude]

Cool! I figured that someone would probably call me on that :). I've tried it myself too. Yes it works but I don't think they sound the same when your done. Maybe I just did it wrong, I don't know.
Thanks for you support :)

[rimar2000]

Obviously, the solution is to change the cone, done by somebody that knows the trade. My work was over a relatively cheap speaker, without ambitions.

[xrobevansx]

Don't Elmers (AKA "school glue" or "white" glue) and Gorilla glue get pretty brittle when they dry? You think a more flexible when dry glue may be better suited for all the vibration it will encounter?

[Bongmaster]

there is copydex or other latex glues

[coolpizzadude]

Well elmers seems to work pretty well, I wouldn't recommend something like epoxy because that will crack. I also wouldn't recommend something super flexible like silicone sealant as it will damage the sound quality. Basically any semi flexible wood glue works well.

[xrobevansx]

Ah...I see. Good! Just wondering.

[offtherails2010]

hi & geat instructable - thanks !

Just foor for thought, but have you tried Plasti-Dip for the outside rubber cracked part of the speaker ???

i have two 8-inch tornado's and they both have had extensive repair work done with clear plastidip (can also be thinned)