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Refoaming woofers

DSChamber

DSChamber

Well-Known Member
Well.. some of you have seen my "Quest for Bass" thread and now know it has gone from "Quest for Bass" to "Quest for Refoam surrounds"... lol... I am glad I was able to put a smile on some faces...

Anyway... I did a search and came across a post by luvvinvinyl who said there was a place in BC that sold surrounds... Main Electronics..

I checked them out and they do sell refoam surrounds. Very fair price... from what I can tell it will cost me $4.50 for each surround, plus $8.85 for the black fast drying glue, or $3.95 for the white, slow drying glue.

Here's the link...

http://www.mainelectronics.com/surround.htm

I measured my driver and from one side to the other it measures 9 5/8" (9.63")... this is measured from the inside edge to inside edge where the surround sat on the basket.

So I think I need this one..

9.63" X 7.13" FOAM SURROUND ANGLE

From their site's instructions they don't make any mention of removing the original dust cap.... but I understand why one would do that, the cone needs to move in and out without the voice coil rubbing... so getting the surround on the cone has to be perfect.

So I figure I will try my hand at this... I mean it's a logical step when dealing with vintage speakers... might as well give it a shot since these Optimus T120's are in such nice condition.

Couple of questions before I place an order...

1. What does the 7.13" measurement refer to?

2. What glue should I go with? The fast drying or the slow drying?

3. I measured my cone itself (without any surround) and it's exactly 8" in diameter...does that mean it's an 8" driver or 10"??

Thanks guys!
 
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I should have added here.. that there was no sensible way for me to remove the cardboard gasket off the basket when I removed it, it was glued to the basket for "all of eternity"... it came apart in pieces.

Will I need another gasket to put back there? What could I use to replace this cardboard gasket?
 
refoaming

DSChamber said:
Well.. some of you have seen my "Quest for Bass" thread and now know it has gone from "Quest for Bass" to "Quest for Refoam surrounds"... lol... I am glad I was able to put a smile on some faces...

Anyway... I did a search and came across a post by luvvinvinyl who said there was a place in BC that sold surrounds... Main Electronics..

I checked them out and they do sell refoam surrounds. Very fair price... from what I can tell it will cost me $4.50 for each surround, plus $8.85 for the black fast drying glue, or $3.95 for the white, slow drying glue.

Here's the link...

http://www.mainelectronics.com/surround.htm

I measured my driver and from one side to the other it measures 9 5/8" (9.63")... this is measured from the inside edge to inside edge where the surround sat on the basket.

So I think I need this one..

9.63" X 7.13" FOAM SURROUND ANGLE

From their site's instructions they don't make any mention of removing the original dust cap.... but I understand why one would do that, the cone needs to move in and out without the voice coil rubbing... so getting the surround on the cone has to be perfect.

So I figure I will try my hand at this... I mean it's a logical step when dealing with vintage speakers... might as well give it a shot since these Optimus T120's are in such nice condition.

Couple of questions before I place an order...

1. What does the 7.13" measurement refer to?

2. What glue should I go with? The fast drying or the slow drying?

3. I measured my cone itself (without any surround) and it's exactly 8" in diameter...does that mean it's an 8" driver or 10"??

Thanks guys!
Click to expand...


1. Cone diameter I believe?

2. Its a polyacrylic glue. (Looks like elmers, BUT ITS NOT) http://www.parts-express.com/pe/showdetl.cfm?partnumber=340-076

3. Sounds like a 10", what is the woofer out of?
 
A dental pick is an extremely handy tool for many hifi repair chores... including teasing off a gasket if you really want to try to save it. Otherwise, MAT Electronics, at least, sells replacement gaskets if you actually need the gasket (most sealed box speakers don't use it since the speakers are mounted from the front).
 
I am thinking I probably don't need the gasket...I think the gasket on my woofers were only there to make a tidy appearance....the surround gets glued to the basket rim, then the cardboard gasket gets glued on top of the surround...unless someone can tell me otherwise??

IMG_3254.jpg


I am still trying to figure out what that second 7.13" dimension is in this part description...

9.63" X 7.13" FOAM SURROUND ANGLE
 
Ok, after looking at the Simply Speakers webpage I think I know what the 7.13" dimension refers to... according to the webpage it is the Inside Diameter...

So 9.63" OD x 7.13" ID

Where do you measure the inside diameter?? I measured the cone of my woofer and it's 8"...????? Help!!
 
does this help, the inner diameter of the foam will be smaller than the cone
 

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I guess will have to keep looking... it seems that I will need a surround that is

9.63" x 7.75" ...

I measured the outside diameter and it is 9 5/8"...

The inside diameter is 8" (ie: the diameter of the cone) and they say to take off 1/4" of that diameter to get your inside diameter that you need.

I measured the woofer that is still good and from what I can see the surround does have a OD of 9 5/8" and an ID of 7.75"

According to the Speakrex webpage ...

http://speakerex.com/refoam_kits.html

All the webpages I have come across don't carry this size of replacement surround... anybody have any suggestions?
 
I have purchased from a local place that has an online site, but the site doesn't list sizes. Try 1-800-new-foam and describe what you need to them. A full kit with aleene's tacky glue (2oz) surrounds, dust caps, and shims was about $30US for me, but I did not need shipping. Kit without dust caps and shims is about $5 less. I have no affiliation with them.

good luck
 
DSChamber said:
Ok, after looking at the Simply Speakers webpage I think I know what the 7.13" dimension refers to... according to the webpage it is the Inside Diameter...

So 9.63" OD x 7.13" ID

Where do you measure the inside diameter?? I measured the cone of my woofer and it's 8"...????? Help!!
Click to expand...

If you are confused, send an email to Simply Speakers.

I have used Simply Speakers and MyAudioAddiction off eBay with no problem. They are both about the same cost when you add item and shipping together.

They are good at responding to questions. They have helped me out with my Advents, Kenwood, Cannon speakers when giving them my dimensions. I give service to whoever responds first.

The critical measurement for me is the cone diameter. You want to make sure the cone fits on the inner flap.

Simply Speakers packages in a cardboard box and supplys a clear glue that dries faster than the white glue provided by MyAudioAddiction which is like Aileen's (available at Fred Meyer $2.99)
 
DS, are you in Vancouver? If so, just bring the driver into Main, and you can match one up -- the guys there are great. They sell the glue, as well; $3, I think.
 
Hey titan.... no, unfortunately I am on the opposite end of Canada , located in Newfoundland..

After doing some searching and reading here is what I believe to be my dimensions needed...

I copied this diagram from an eBay auction and modified it, I apologize if this belongs to someone here...

wooferdimensions.jpg
 
terra1 said:
If you are confused, send an email to Simply Speakers.

I have used Simply Speakers and MyAudioAddiction off eBay with no problem. They are both about the same cost when you add item and shipping together.

They are good at responding to questions. They have helped me out with my Advents, Kenwood, Cannon speakers when giving them my dimensions. I give service to whoever responds first.

The critical measurement for me is the cone diameter. You want to make sure the cone fits on the inner flap.

Simply Speakers packages in a cardboard box and supplys a clear glue that dries faster than the white glue provided by MyAudioAddiction which is like Aileen's (available at Fred Meyer $2.99)
Click to expand...


Thanks Terra.... I just sent an email to info@simplyspeakers.com... hope they come back with something....
 
Or you can check with member ReEdger. I've never dealt with him, but always see his name in the Feedback forum.
 
DSChamber said:
Couple of questions before I place an order...

1. What does the 7.13" measurement refer to?

2. What glue should I go with? The fast drying or the slow drying?

3. I measured my cone itself (without any surround) and it's exactly 8" in diameter...does that mean it's an 8" driver or 10"??

Thanks guys!
Click to expand...

1. 7.13" as mentioned is the Inside Diameter 7.25 = 7 1/4" so 7.13 is about 7 1/8"

2. The slow drying gives you a longer time frame to make adjustments. But by being slow takes longer to set up. You may have to continually press down on the flaps to make sure they don't curl up during drying.

3. The TS-120 would be considered to have a 10" driver/woofer. My Kenwood and Cannon have 12" drivers but they have 9 1/2" cones.

I was confused with all the different measurements when I started out too.
So I found it easier just to give them my measurements and verify if what they offered would fit.

You do not need .01" precision. The surround foam will be flexible so a difference of .01 will be meaningless.

The main concern is the 8" cone rests inside the inner roll like your pic so you want an inner roll diameter about 8" and the inner flap should allow enough overlap to glue onto the cone. And that the Outside diameter sufficiently overlaps the frame for gluing.
 
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