Blvdre Posted October 2, 2021 Share Posted October 2, 2021 I searched forum, and didn't find anything specific mentioned. I also searched the web, and there are all kinds of opinions about what should be used, for paper surrounds in general. I'd like to know what is specifically recommended for the K-33-E woofer surrounds. Why? Well, I pulled the woofers from my La Scalas recently, and found a build up of dusty debris on the bottom-facing side of each woofer. This debris has pulled a lot of the doping from that portion of the surrounds, for a length of about 3". It looks dry to the eye. I'd like to replenish the doping in those areas (if possible), so am wondering if anyone has recommendations. I'm particularly interested in what @Chief bonehead might have to say about this, should he see this post. My interest is in refurbishing the surrounds correctly, so as not to affect the driver parameters. Any help is appreciated. Quote Link to comment Share on other sites More sharing options...
Curious_George Posted October 2, 2021 Share Posted October 2, 2021 It is probably polyvinyl acetate or some cousin of it. You can buy it from Simply Speakers. Quote Link to comment Share on other sites More sharing options...
Curious_George Posted October 2, 2021 Share Posted October 2, 2021 When I reconed some JBL D130's, I used a kit from Simply Speakers and in the kit was a small bottle of polyvinyl acetate and it was used to seal (dope) the outer surround. Worked perfect and sealed the surround. 1 Quote Link to comment Share on other sites More sharing options...
Madman1 Posted October 2, 2021 Share Posted October 2, 2021 I have a weak spot in the paper cone of a k-33, and I safely use something on the back to reinforce? Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted October 2, 2021 Share Posted October 2, 2021 53 minutes ago, Madman1 said: I have a weak spot in the paper cone of a k-33, and I safely use something on the back to reinforce? Depending on the size of the spot, you can likely use some newspaper and some flexible fabric glue. 2 Quote Link to comment Share on other sites More sharing options...
Blvdre Posted October 2, 2021 Author Share Posted October 2, 2021 2 hours ago, Madman1 said: I have a weak spot in the paper cone of a k-33, and I safely use something on the back to reinforce? Madman1, please start a post for your issue. Hope this doesn't sound rude (that is not my intention), but I want to keep this post focused. Quote Link to comment Share on other sites More sharing options...
Racer X Posted October 2, 2021 Share Posted October 2, 2021 So only Chief Bonehead should reply here ? Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted October 2, 2021 Share Posted October 2, 2021 44 minutes ago, Racer X said: So only Chief Bonehead should reply here ? I don't think he said that. Quote Link to comment Share on other sites More sharing options...
Curious_George Posted October 2, 2021 Share Posted October 2, 2021 https://www.simplyspeakers.com/speaker-repair-adhesive-mi-1291.html After you get 50 different answers, this will still be THE answer. Quote Link to comment Share on other sites More sharing options...
Blvdre Posted October 2, 2021 Author Share Posted October 2, 2021 17 minutes ago, Curious_George said: https://www.simplyspeakers.com/speaker-repair-adhesive-mi-1291.html After you get 50 different answers, this will still be THE answer. Yeah, judging by my searches, it's between Latex and PVA adhesives. Quote Link to comment Share on other sites More sharing options...
Blvdre Posted October 2, 2021 Author Share Posted October 2, 2021 2 hours ago, Racer X said: So only Chief Bonehead should reply here ? No, Madman1 brought up a different issue in regards to cone integrity. Comments about doping of the K-33 surrounds are welcome. Any suggestions? Quote Link to comment Share on other sites More sharing options...
Klipsch Employees Chief bonehead Posted October 3, 2021 Klipsch Employees Share Posted October 3, 2021 Pva’s is what is used on cloth surrounds. 1 1 Quote Link to comment Share on other sites More sharing options...
Madman1 Posted October 3, 2021 Share Posted October 3, 2021 4 hours ago, Blvdre said: Madman1, please start a post for your issue. Hope this doesn't sound rude (that is not my intention), but I want to keep this post focused. Yep, no worries. My apologies, I thought your question had been answered already. 1 Quote Link to comment Share on other sites More sharing options...
OO1 Posted October 3, 2021 Share Posted October 3, 2021 8 hours ago, Blvdre said: This debris has pulled a lot of the doping from that portion of the surrounds, for a length of about 3". It looks dry to the eye. I'd like to replenish the doping in those areas (if possible), the black cement glue that is used to glue dustcaps should do the job Quote Link to comment Share on other sites More sharing options...
Blvdre Posted October 3, 2021 Author Share Posted October 3, 2021 PVAs it is. Thanks to @Curious_George and @Chief bonehead for your replies. 1 Quote Link to comment Share on other sites More sharing options...
Blvdre Posted October 10, 2021 Author Share Posted October 10, 2021 Just to wrap this up, I’ve finished treating the dry areas of the surrounds using Simply Speakers’ PVA. I preferred adding a bit of water, to help it flow a bit better. After ~3 light applications, I couldn’t tell where the dry sections started/ended. Nice and flexible, worked like a charm. Time to get them back in the La Scalas. 1 Quote Link to comment Share on other sites More sharing options...
Marvel Posted October 10, 2021 Share Posted October 10, 2021 Awesome... I've always used Weldbond, an easily obtainable PVA glue recommended by djk years ago. I always did as you, thinning it a little and using multiple coats. I've successfully repaired cracked rubber surrounds, by using a piece of cigarette paper (or similar) on the back side just like you would do laying up fiberglass. Works on tears in a paper cone as well. 1 Quote Link to comment Share on other sites More sharing options...
dirtmudd Posted November 21, 2021 Share Posted November 21, 2021 On 10/10/2021 at 12:49 PM, Marvel said: piece of cigarette paper 1 Quote Link to comment Share on other sites More sharing options...
Blvdre Posted November 21, 2021 Author Share Posted November 21, 2021 1 hour ago, dirtmudd said: Ah, the memories, lol Quote Link to comment Share on other sites More sharing options...
Curious_George Posted November 21, 2021 Share Posted November 21, 2021 Roll your own with Zig-Zag, to take off the rough edges (zig zags). Quote Link to comment Share on other sites More sharing options...
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