Bass Speaker Repair (attempt) :D

Andyman

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Music related, but also DIY, so I opted for this forum.

My latest project :)
I picked this up for $20 from a guy on the TalkBass classifieds. actually "free, you pay shipping" The ad was very old (over a year) but close to me, so I took it as fate. 15" speaker from an 8 ohm SVT 15E cab. Voice coil seized, he said from leaving it outside all winter, in Montana.

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It's dark around the dust cap from acetone, to soften the glue.

Dust cap removed

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found the issue- the inner magnet is pinching the voice coil. During my web research I found this is because it came unglued from the back plate.

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more to follow!
 

Jared

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I know nothing about what you’re doing here, but I am intrigued by the process. How much of the black part ( laymen term) do you need to reuse, or do you replace it all?
 

XXL

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My BIL is big time into drivers and I showed him this thread last night. He was happy to learn about the acetone for the glue. He also had some advice about your project Andy but I was pretty waged by then and don't remember much of it.
 

NSYMCE

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prolly not.
I creased the cone quite a bit trying to free the voice coil.

But even with that I'm only in about $80.
:)
I know a recone guy north of Seattle.if you want another opinion, maybe a Bro deal on parts, etc. Same guy I mentioned before who I used to share shop space with a zillion years ago. I’m sure you’ll manage fine if you get a decent recone kit, should it come to that.
 

Jim C

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Re-coning is one of those things that is reasonably simple by design and looks easy to do when you watch a pro.
Getting the voice coil seated perfectly in the gap, and, getting everything else right is really hard IMO.
But we're cheering for you!
 

Andyman

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Update: in the first post I surmised that the voice coil was being "pinched" by the center pole of the speaker. Noe I think it is more likely that it shorted/ melted and is being held in by the expanded/ melted epoxy. I will try to remove it again after work today. Maybe.

:)
 

NSYMCE

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Update: in the first post I surmised that the voice coil was being "pinched" by the center pole of the speaker. Noe I think it is more likely that it shorted/ melted and is being held in by the expanded/ melted epoxy. I will try to remove it again after work today. Maybe.

:)
If the motor's hard parts have shifted a long lasting repair is gonna be dicey, IME. A melted and/or physically distorted voice coil is probably about a zillion times more likely though. ;)
 
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