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How to tell a subwoofer is blown?

Discussion in 'Car Audio / Security / Electronic Accessories' started by YouKnowWhoIBee, Jun 29, 2007.

  1. YouKnowWhoIBee

    YouKnowWhoIBee my avatar is better.

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    I have a 12 inch alpine type-r with an alpine amp. I was cleaning my car out and i removed the box and such and when putting it back in i noticed some of the seal torn from the sub. I took a quick video of it without playing music.

    Video of Blown Subwoofer - Photobucket - Video and Image Hosting

    And then i took a video of it playing a Jay-Z song with a good amount of bass.

    Video of Subwoofer with bass - Photobucket - Video and Image Hosting

    I dont think that is normal, and i know it is not supposed to sound like that. I wonder if i get some silicon sealant and go around the whole rim of the sub and give it a day or to to bond. Whats your thoughts? Oh and these videos are from my cell so give me a break :)
     
  2. TommyTheCat

    TommyTheCat Gonzo Scientist

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    First, only push on the center of the cone. When you push on the edges you're hearing the coil rubbing against the pole piece / magnets. It doesn't seem to be "blown" when you pushed on the center - there wasn't any scraping indicating a blown coil.

    I would get some CA glue to fix the surround->cone problem.
     
  3. YouKnowWhoIBee

    YouKnowWhoIBee my avatar is better.

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    I bought some GE brand Lexan sealant/adhesive. Alpine recommended that over the phone. It is a clear sealant that has a strong bond to it. If that doesnt fix the issue alpine will send me a new one if i can find the receipt :) It still hits very hard, but it sounds like my license plate is rattling but it is just that rubber seal hitting the cone.
     
  4. phyregod

    phyregod !!YTINASNI

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    Dont put any more music through it until you get that fixed. Having the rubber loose on one side will scratch up the pole/magnets and you're speaker will definently be screwed then.
     
  5. YouKnowWhoIBee

    YouKnowWhoIBee my avatar is better.

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    I pulled it out of my car after that video. I applied a layer of that adhesive between the cone and rubber. Then i sealed the sub up with some additional sealer. I am giving it till tomorrow night to dry then trying again.
     
  6. YouKnowWhoIBee

    YouKnowWhoIBee my avatar is better.

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  7. TommyTheCat

    TommyTheCat Gonzo Scientist

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    Ah!! Don't tap too hard. Metal cones are bitchy about anything you try to do with them.
     
  8. YouKnowWhoIBee

    YouKnowWhoIBee my avatar is better.

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    I was just moving it to see if the seal held up :) Damn Tommy, i knew you knew your audio.
     
  9. TommyTheCat

    TommyTheCat Gonzo Scientist

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    Just dont go bouncing change off the cone like so many retards do.
     
  10. YouKnowWhoIBee

    YouKnowWhoIBee my avatar is better.

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    Last edited: Jun 30, 2007
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