speaker refoam

[K-5BLAZER]

I am getting ready to have a pair of woofers refoamed the dust caps are smashed. I have all the parts I know that you do not all ways have to remove the dust cap to do the job. my question is dose it matter what order you do the job in. change the dust caps first or the other way around

 

[mlucitt]

Can you tell us the speakers you are refoaming. Some brands are different in the steps.

 

[K-5BLAZER]

it is a set of CVs re-38s 15''

 

[mlucitt]

Does the RE-38 speaker system use the 152WR 15" woofer?

 

[K-5BLAZER]

no it dose not it uses the 152wr it uses the rew15 part # it is a flatattach type not an angle attach
this is the foam kit I have
https://www.simplyspeakers.com/cerwin-vega-speaker-foam-edge-repair-kit-fsk-15fr.html

these are the replacement dust caps I ordered
https://www.ebay.com/itm/3-3-4-Dust...128756?hash=item43d9c13cf4:g:BNcAAOSw7aBVE1r3

 

[mlucitt]

Those 15s are easy to refoam. For the dustcaps, I try to stick the tip of a pin in the cap sideways and try to pull the dent out. Can't do that with the aluminum dust caps. The felt dust caps on the CV have no effect on cone alignment, so it will not matter which you do first. I would try and fix the original dust caps, replacing them will never be as good as the originals. But if you choose to replace them, you have to cut them out and re-glue the slightly larger replacement dustcaps over the old glue line. I just don't like that look.
The foam is more critical in alignment. Cut off the cardboard gasket by slicing it away from the frame, keep it for re-use. Once you get all the old foam cut away from the speaker cone with a new razor blade, get the rest off of the speaker frame. Apply the glue to the top edge of the speaker cone and center the few foam using the old foam edge as a guide. Let that dry.
The foam should be resting slightly above the speaker frame. Then apply the glue to the speaker frame. Lift the cone up from the bottom and make sure the voice coil is not rubbing, lift it up and down a few times to make sure it is centered then pull it down into position. The glue will grab but not permanently. Push on the face of the cone to make sure it is not rubbing, if it is re-position and try again. If its good, tap it down all the way around. Add some more glue and attach the gasket. make sure the holes align and then turn the speaker over and set it on the bench until the glue dries.

 

[K-5BLAZER]

Those 15s are easy to refoam. For the dustcaps, I try to stick the tip of a pin in the cap sideways and try to pull the dent out. Can't do that with the aluminum dust caps. The felt dust caps on the CV have no effect on cone alignment, so it will not matter which you do first. I would try and fix the original dust caps, replacing them will never be as good as the originals. But if you choose to replace them, you have to cut them out and re-glue the slightly larger replacement dustcaps over the old glue line. I just don't like that look.
The foam is more critical in alignment. Cut off the cardboard gasket by slicing it away from the frame, keep it for re-use. Once you get all the old foam cut away from the speaker cone with a new razor blade, get the rest off of the speaker frame. Apply the glue to the top edge of the speaker cone and center the few foam using the old foam edge as a guide. Let that dry.
The foam should be resting slightly above the speaker frame. Then apply the glue to the speaker frame. Lift the cone up from the bottom and make sure the voice coil is not rubbing, lift it up and down a few times to make sure it is centered then pull it down into position. The glue will grab but not permanently. Push on the face of the cone to make sure it is not rubbing, if it is re-position and try again. If its good, tap it down all the way around. Add some more glue and attach the gasket. make sure the holes align and then turn the speaker over and set it on the bench until the glue dries.

thanks
I all ready tryd to pull them back out but they are pushed all the way in. I agree I would rather not change the dust caps I am going to rry your idea and also a shop-vac if it dose not work they will have to be changed

 

[mlucitt]

I bet is was a kid that pushed those dust caps in...

 

[K-5BLAZER]

I think you are right I got them from the 2nd owner who had them for most of there life. I am also going to have the crossovers recaped

 

[MarkWComer]

I did a set of 12” CV speakers. Used shims to center the voice coils.

 

[mlucitt]

If you replace the felt dust caps you can do that. But some of us have refoamed or replaced the surround on so many Vega's and JBL's, we just have the "touch". The 18" Vega's are the easiest to do because that huge cone and suspension are so stiff.

 

[laatsch55]

I* miss my D9's.....

 

[laatsch55]

I miss the D9's sitting in front of the K's with a pair of Heresy's on top of each K....

 

[K-5BLAZER]

I did a set of 12” CV speakers. Used shims to center the voice coils.

I have seen your video before some times depending on the glue you need to shim the coil if it is slow if it is fast or medium you do not all ways need to shim the coil. also if you still have those run them on 700 when it is finished.

 

[K-5BLAZER]

If you replace the felt dust caps you can do that. But some of us have refoamed or replaced the surround on so many Vega's and JBL's, we just have the "touch". The 18" Vega's are the easiest to do because that huge cone and suspension are so stiff.

+1 on this

 

[K-5BLAZER]

I hope they will play nice with my 800 csl

 

[MarkWComer]

I have seen your video before some times depending on the glue you need to shim the coil if it is slow if it is fast or medium you do not all ways need to shim the coil. also if you still have those run them on 700 when it is finished.

Since I’ve never refoamed a woofer before I thought it best to follow the provided instructions. A freind of mine saw this vid and bought the kit for an 8” 2-way system for refoaming- for this pair, I didn’t shim or replace the cap- and they worked just fine.

For my own sense of mechanical precision, I’d rather do the shims and dust cap, and know for certain that they’re mechanically correct. I’m more than just a bit OCD about stuff like this, even if it may be a bit “overkill.”

 

[K-5BLAZER]

Since I’ve never refoamed a woofer before I thought it best to follow the provided instructions. A freind of mine saw this vid and bought the kit for an 8” 2-way system for refoaming- for this pair, I didn’t shim or replace the cap- and they worked just fine.

For my own sense of mechanical precision, I’d rather do the shims and dust cap, and know for certain that they’re mechanically correct. I’m more than just a bit OCD about stuff like this, even if it may be a bit “overkill.”

nothing wrong with that
I think this is also a good idea

 

[Fast Forward]

If you have a shop vac you can try sucking the dust caps out, but if you are refoaming tou have to make sure the voice coils are centered other wise you may get a case of speaker buzz

 

[K-5BLAZER]

I had a friend refoam them went well no coil rub. was unable to get the dust caps to pop back out and look good so they were changed.
also put some of this https://www.simplyspeakers.com/speaker-repair-cone-edge-sealer-mi-1291fg.html on the new surrounds so they should last a very long time.
just need new screws for the mids