Question about MTX Thunder7500 T7512-04 Car Subwoofer

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MTX Thunder7500 T7512-04 needs repair

The cone became seperated from the ribbed base. is this repairable? please help!

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Can try to repair it is it around the outside rim ?? use SILOCONE to repair it as it will flex when used DO NOT USE SUPERGLUE

Posted on Sep 05, 2009

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Posted on Jan 02, 2017

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Sub stopped working, unless i push on it?


sounds like maybe the wiring from the cone to the magnet is ripped or broken.... which is why when you push the cone in it works because it pushes it far enough to make the wires touch just barely, but when you let it go the wires seperate and you get no sound.

Your wire is built with slack, so when the cone goes in and out during a song, the wire can move with it and not get broken. but when you cone moves too in or too far out, then that wire can snap or become disconnected.

I have fixed this by soldering the copper wire, but you may lose some power because your copper wire might be a bit shorter(it will probly break again)... or you can lengthen it, but it is not easy to solder... some places will fix it for you but the cost may be more than what it is worth.

This is just a guess, take your speaker outta the box, and look to see if these wires are broken, lose, or frayed.

good luck.

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Hole in subwoofer


Hello colinomalley,

You can repair the hole using a flexible permanent adhesive. If all of the cone is still there, I wouldn't use a patch. I'd just put the jagged edges back together. If part of the cone is actually missing, you will need to patch it. Thin fiberglass cloth works pretty well. Use painters tape that will remove easily and cover the hole from the rear of the speaker. Cut the fiberglass cloth about 1/4" larger than the hole and attach it using a silicone based flexible adhesive. Allow it 24 hours to set up completely and then remove the tape from the rear.

A product called "shoe goo" works very well for speaker repairs. It's strong, flexible, and permanent.

Hope this helps.

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try using quick setting epoxy glue. just put pressure on the same spot while holding the epoxy with an old spoon lined with clear plastic wrap. after epoxy sets, remove the spoon and trim away the plastic film with a new razor blade. to be sure the connection is being made, turn sound on just so you can barely hear it before performing this so that the cone vibrations do not interfere with the setting epoxy.

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