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How to fix a dented speaker

Has the center of your speaker cone been poked-in? CNET's Donald Bell teaches you several techniques for returning it to its former glory.

Donald Bell

August 22, 2013 3:23 PM PDT

Fix a dented speaker cone

Last weekend I had a yard sale with some pairs of speakers to unload. After the first wave of hardcore hagglers trampled through my yard I pointed out that someone had trouble resisting the impulse to dent the middle of my vintage speakers.

The bastards!

Since I was not about to let them spoil my day (or my profits), I rushed the speakers indoors to fix them up. A quick online search for some DIY solutions bore out some useful results, which I've gathered here.

Photo of cotton wool ball used to remove speaker dent.

A cotton swab, a dab of super glue and several patience is a good way to undo damages.

(Credit: Donald Bell/CNET)

Swabs and glue

Ok, honestly, this method bubbled up in the dark recesses of my memory and never the internet, though I'm sure it's out there somewhere. It's also the process that worked for me right off the bat.

You'll need a cotton swab, some scissors or nail clippers, and a couple dabs of super glue. Use the scissors to offer one end from the cotton swap a flat top. This will give it a bigger area to make contact with the speaker. Next, put several drops from the super glue for the flattened end of the swab you only cut, have a second to soak in, and after that press it firmly into the biggest market of the dent. Hold it there for 15-30 seconds so when you release it, it must be able to fully stand up on its own.

Let the glue set for around ten minutes and then provide a slow tug before dent pops out. After that, gently twist the swab backwards and forwards to loosen it, then slowly pull again while twisting and also the swab should pop quickly.

Vacuum hose

One with the most popular techniques recommend on the world wide web for removing a speaker dent is to vacuum out with a hose attachment. I didn't attempt this place until later, as I was sure that the vacuum would rip the dome beyond my speaker altogether.

But in my case, a minimum of, the vacuum would be a great solution. It's also the only real technique on this list that wont leave behind glue residue or even a puncture. You simply switch on your vacuum, position the hose attachment in the dent, along with any luck your dent will pop right back into shape.

Another variation on this method is to use a an empty paper towel roll like a giant straw and suck the dent out like a milkshake, but pride prevented me from giving any particular one a shot.

Poke and pull

Finally, as an option of last option, you can look at piercing the midst of the dent using a slightly bent sewing needle and carefully hook the needle around to drag out the dent. If you have an extremely nasty, complicated dent to undo, this is sometimes a fine method to go -- but once you do have a hole within your dome there's really no way to prettily patch up. Your speaker will forever resemble an eyeball a bit strung-out pupil in the centre. Sonically, though, just a little pinhole within your dust cap will not affect your quality of sound. It's just ugly.

So there you go, those are my personally tested approaches for taking the dent beyond a speaker dust cap. I also have a very video that demonstrates each option, located at the top of this post.

Rock on.

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