BV2600 still sounding bad after recap

28 replies

I'm afraid not, its quite a difficult job if the magnet has slipped. Have they been re-foamed recently? Perhaps the surrounds weren't put on correctly.

Cut the dust cap as in pic and check for the gap all around, if the magnet has slipped one side is totally closed and the other side totally open, If you can get an acetate strip of 0.10 mm in all around, add 1 acetate strip and check all around, the acetate strips must go in freely until the bottom (end) if there are differences in the gap, check the spider for damages or deforming, if the spider looks OK you  may have to change  the surrounds. If the surrounds has been changed that may be your problem.

The dust cap can be glued back with a small amount of glue all around. I use Aleene's Tacky glue

Location: Mexico city

Retired
Printing machine technician
Restored various 1960-70 items
Rock and Roll music
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Restored Jukebox Wurlitzer 1050

No, they are still all original. Would there be any experts who can do this or is it just not worth it?

Søren Mexico wrote:

Cut the dust cap as in pic and check for the gap all around, if the magnet has slipped one side is totally closed and the other side totally open, If you can get an acetate strip of 0.10 mm in all around, add 1 acetate strip and check all around, the acetate strips must go in freely until the bottom (end) if there are differences in the gap, check the spider for damages or deforming, if the spider looks OK you  may have to change  the surrounds. If the surrounds has been changed that may be your problem.

The dust cap can be glued back with a small amount of glue all around. I use Aleene's Tacky glue

Okay, seems worth trying since they're useless like this as well! Thanks!

 

Edit: Extra question, if just the magnet has slipped, can I just place it back? Sorry if it's a stupid question, this is my first audio DIY 😕

Forgot to mention do not use the speakers until you find the failure, you may destroy the voice coil.

Location: Mexico city

Retired
Printing machine technician
Restored various 1960-70 items
Rock and Roll music
Collecting Vinyl
Restored Jukebox Wurlitzer 1050

/forum/nordic/lite-info-om-hdr-2-med-comhem-kabel-tv#post-1747200

I've opened the dustcap, and I don't think the magnet is really moved to one side. It is a bit more to one side but i don't think that's really it.

How can I get the magnet out the speaker because it seems glued or something?

And what I noticed as wel, if I push the cone forward a bit, almost all of the rattling is gone... Also, pushing it inward at a certain spot stops it, on the other side does not help so it might as well be the magnet? How can I get it out?

 

If the magnet has become unglued the center would be totally to one side and the cone very difficult to move in and out. You will probably have to change the surrounds if the spider is OK, Do not try to loosen the magnet. Cut some acetate strips about 10 x 80 x 0.1 mm and try the gap, it is essential that the cone with voice coil is centered and parallel to the magnet.

Location: Mexico city

Retired
Printing machine technician
Restored various 1960-70 items
Rock and Roll music
Collecting Vinyl
Restored Jukebox Wurlitzer 1050

Did you or someone else change the foam surrounds ?

Location: Mexico city

Retired
Printing machine technician
Restored various 1960-70 items
Rock and Roll music
Collecting Vinyl
Restored Jukebox Wurlitzer 1050

As far as I know nobody changed the surrounds (which are rubber instead of foam I believe). It is indeed the cone which is not centered properly but the spider seems OK. The magnet is still glued so that's OK as well. There is just a bit more space on one side of the magnet but with a bit of pushing I can get a .10mm strip in at all sides. Should refoaming help?

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