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Fred_reun View Drop Down
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    Posted: 19 June 2024 at 6:24pm
Hi ! 

I’m starting to repair my own speakers, and I got some issues with the replacement of the voice coil.

I got 3 ref different and no indications of the height of the cooper around the magnet, if you guys got this info somewhere Cry

I got 2 wharfedale D-161, 1 B&C 18ps76 and 1 B&C 18ps100

Thanks you !
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Points: 585 		Post Options Post Options   Thanks (0) Thanks(0)   Quote VECTORDJ Quote  Post ReplyReply Direct Link To This Post Posted: 19 June 2024 at 10:46pm
It is clear You should not be Reconing...I suggest taking the Speakers to a Local Pro Reconer....Sorry to be Mean but the Truth can Hurt.
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BrainlessTekno View Drop Down
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Points: 381 		Post Options Post Options   Thanks (0) Thanks(0)   Quote BrainlessTekno Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2024 at 7:02am
somewhere here there is detailed step to step guide for reconing
BarSick / barsik soundsystem
Dont want to toot my own horn but toot toot
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Fred_reun View Drop Down
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Points: 15 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Fred_reun Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2024 at 7:13am
The thing is : there is a specific height to glue back the new coil but I didn’t get the instructions with the coil that’s why I’m asking, I do not ask for your opinion about my reckoning skills, everyone start something by trying and learning. Pleas be kind and have a good day
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BrainlessTekno View Drop Down
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Points: 381 		Post Options Post Options   Thanks (0) Thanks(0)   Quote BrainlessTekno Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2024 at 8:01am
Sure make the recone yourself, worse that can happen is that you lose a recone kit so deffinitly you try to do it yourself

Here is the guide in case that you missed it https://forum.speakerplans.com/a-recone-guide_topic29715.html
BarSick / barsik soundsystem
Dont want to toot my own horn but toot toot
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Fred_reun View Drop Down
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Thanks for your reply,

As I understand for long coil the height I need to get btwin the bottom of the magnet hole and the bottom of the coil is Xmax in mm?
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BrainlessTekno View Drop Down
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Points: 381 		Post Options Post Options   Thanks (0) Thanks(0)   Quote BrainlessTekno Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2024 at 8:36am
Look you need to put the voice coil that way that the coil never leaves the magnetic gap, yes you can basicaly say that if the xmax is 10mm you need the VC at least 10mm from the magnet, however i would add an extra 2mm on top of it, not sure if that is the standard procedure
BarSick / barsik soundsystem
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Fred_reun View Drop Down
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Points: 15 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Fred_reun Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2024 at 8:39am
I just tried, I’ll let you know if it sounds better or if I still get this shitty noise at loud level
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BrainlessTekno View Drop Down
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Voice Coil Overhang: (Hcoil - Hgap) / 2
Position from Bottom of Gap: Xmax + (Hgap / 2) - (Hcoil / 2)

Let's assume: 
Xmax = 5 mm Height of the magnetic gap 
(Hgap) = 10 mm Height of the voice coil (Hcoil) = 20 mm 
The bottom of the coil should be positioned: 
Overhang = (Hcoil - Hgap) / 2 = (20 mm - 10 mm) / 2 = 5 mm 
Position from Bottom of Gap = Xmax + (Hgap / 2) - (Hcoil / 2) = 5 mm + (10 mm / 2) - (20 mm / 2) = 5 mm + 5 mm - 10 mm = 0 mm 
This means the bottom of the coil should be flush with the bottom of the magnetic gap in this specific example, allowing for equal movement up and down corresponding to the Xmax.
BarSick / barsik soundsystem
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Fred_reun View Drop Down
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So how do you got the Hgap in this exemple ? Because I got Xmax (8mm) coil height (23mm) but no indication of hgap
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BrainlessTekno View Drop Down
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you can sometimes find it in specification, but it seems to be rare... I found an app online but i actualy never used it so try to double check the results or get the advice from someone with more knowledge

the app -> https://www.kjmagnetics.com/gap.calculator.asp
BarSick / barsik soundsystem
Dont want to toot my own horn but toot toot
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Fred_reun View Drop Down
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Points: 15 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Fred_reun Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2024 at 10:25am
I did not get result in mm or inch on your site :/ is it possible maybe to measure it with specific tools?
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