Repairing a speaker

user68 · 24th February 2012, 10:27 PM

I'd like to repair this Audax speaker myself if possible. The magnet has become detached from the basket. I've never opened up a speaker before and would appreciate any help. Does it just need glueing back on to the basket or is there more to it?

nigelwright7557 · 24th February 2012, 10:35 PM

You will need to clean off all the old glue so it sits straight and doesnt cause the voice coil to rub.
I would reglue it but make sure the voice coil doesnt rub in the position you glue it.

Speakers are made from the other way, the magnet is fixed first then shims are put in to center the magnet.
Then the voice coil is entered into the magnet.

user68 · 24th February 2012, 10:39 PM

Thanks Nigel, do you know if epoxy can do the job or is there a particular type of adhesive required?

nigelwright7557 · 24th February 2012, 10:44 PM

They use super high strength epoxy.

See youtube video:
[How It's Made] Building a Speaker - YouTube

user68 · 24th February 2012, 10:47 PM

Thanks

cyclecamper · 24th February 2012, 10:53 PM

It's all up to you. Pro shops woudl not attempt it without also reconing. LIke Nigel said, they are assembled the opposite way. There is no cone yet, and they assemble the magnet and pole piece. Then the cone/voice coil assembly (without dust cap) is shimmed in place in the magnetic gap (thru where the dust cap would be), and the surround and suspension are both glued. Then when dry the shims are removed and the dust cap glued in place.

user68 · 24th February 2012, 11:02 PM

It all makes sense now having watched the youtube video. Looks best to send it to a pro shop so that it gets centred accurately and get it reconed at the same time for a proper job. Thanks

24th February 2012, 10:35 PM	#2
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	You will need to clean off all the old glue so it sits straight and doesnt cause the voice coil to rub. I would reglue it but make sure the voice coil doesnt rub in the position you glue it. Speakers are made from the other way, the magnet is fixed first then shims are put in to center the magnet. Then the voice coil is entered into the magnet. __________________ http://www.murtonpikesystems.co.uk PCBCAD50 pcb design software.

24th February 2012, 10:44 PM	#4
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	They use super high strength epoxy. See youtube video: [How It's Made] Building a Speaker - YouTube __________________ http://www.murtonpikesystems.co.uk PCBCAD50 pcb design software.

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24th February 2012, 10:39 PM	#3
user68 diyAudio Member Join Date: Jul 2010	Thanks Nigel, do you know if epoxy can do the job or is there a particular type of adhesive required?

24th February 2012, 10:47 PM	#5
user68 diyAudio Member Join Date: Jul 2010	Thanks

24th February 2012, 10:53 PM	#6
cyclecamper diyAudio Member Join Date: May 2010 Location: was Chicago IL, now Long Beach CA	It's all up to you. Pro shops woudl not attempt it without also reconing. LIke Nigel said, they are assembled the opposite way. There is no cone yet, and they assemble the magnet and pole piece. Then the cone/voice coil assembly (without dust cap) is shimmed in place in the magnetic gap (thru where the dust cap would be), and the surround and suspension are both glued. Then when dry the shims are removed and the dust cap glued in place.

24th February 2012, 11:02 PM	#7
user68 diyAudio Member Join Date: Jul 2010	It all makes sense now having watched the youtube video. Looks best to send it to a pro shop so that it gets centred accurately and get it reconed at the same time for a proper job. Thanks