Repairing dimpled tweeters

January 18, 2023
 by Paul McGowan

4 comments on “Repairing dimpled tweeters”

  1. I’ve seen a lot of cases where people should have left well enough alone. Like you say a small dimple really isn’t going to make much (if any) difference in sound. If there’s a reason I need to “repair” a dome I have a very simple rule of thumb, replace the dome. It’s an easy job that doesn’t take much time, cut the old one off and glue the new one on. I’ve never had replacing a dimpled dome make a difference you can hear. I can only think of one damaged dome in decades that actually hurt sound quality. It was a torn titanium dome and the edges were vibrating against each other.

    OHT

  2. Thanks for answering my question Paul! I thought for sure the “sound waves” would suffer from a difference in dispersion (or whatever the correct terminology is… 🙂 ) especially for the metal dome tweeters that rarely “pop” back in place.

    So excited to see you respond to my submission!

    1. Where you don’t want the dimple is on a metal tweeter or near the edge of the tweeter that attaches to the voice coil. You can get a metal tweeter diaphragm close to normal but there will still be some wrinkles in it. Some people will use a vacuum cleaner on woofer dust caps but I don’t recommend that. If your tweeter diaphragm is screwed onto the magnet you can remove the screws from the magnet exposing the other side of the diaphragm. Not the screws that attach the entire tweeter assembly to the cabinet but rather the screws that attach the tweeter diaphragm to the magnet. There are usually 3 screws. Carefully remove it slowly without touching the tweeter voice coil to the magnet gap. A little touching should be OK, you just don’t want to scrape it hard against the magnet gap and deform the coil. There will likely be some ferrofluid on the voice coil and also in the gap. The ferrofluid is magnetic so it shouldn’t leak all over the place, just don’t touch it. You will have access to the rear of the tweeter diaphragm. Just take a Q-tip and gently push it back out.

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