13Hertz Posted October 9, 2022 Share Posted October 9, 2022 Bored and curious this morning, I removed the 4 screws from one of my K-77 Heresy Tweeters and wanted to see how it came apart - but I think in doing so, I've broken the electrical connections probably - wanting to see if anyone who knows about these drivers can confirm? Right now, I don't want to believe it, but I think I know the answer. If I have in fact broken it, of course the next question is: can it be repaired? Or will I need to purchase a new diaphragm? The wires coming off the diaphragm are smaller than sewing thread....can't see how they can be reconnected (by me). Thanks. Quote Link to comment Share on other sites More sharing options...
13Hertz Posted October 9, 2022 Author Share Posted October 9, 2022 Might as well ask this question as well: The reason I was taking this apart, was to see how the lens connected and how it separates from the magnet and diaphragm. I've been looking at the aftermarket lenses that replace the existing lens and mount flush to the front of the motorboard. How does the lens come off of the K-77? Quote Link to comment Share on other sites More sharing options...
Deang Posted October 9, 2022 Share Posted October 9, 2022 @13HertzYes, you pulled it apart in reverse order. You have to hold the rear of the assembly together and wiggle off the horn. There is a DIY fix that is tricky and very time consuming. It is easier to replace the diaphragms (in both). Use someone that uses the Klipsch part and will use a signal generator to make sure the diaphragms are properly seated after the repair. https://reconingspeakers.com/products-page/klipsch-k77f-127126-diaphragm/ 1 Quote Link to comment Share on other sites More sharing options...
garyrc Posted October 10, 2022 Share Posted October 10, 2022 Reminds me of the veddy, veddy British manual for the SME tone arm in about 1969, in which they cautioned, "Do not take it to pieces." I can't decide whether that is my favorite, or Luxman's use of just the right amount of feedback to "avoid evil effect." 3 2 Quote Link to comment Share on other sites More sharing options...
JohnA Posted October 10, 2022 Share Posted October 10, 2022 Yes, you did. Bummer. But the perfect opportunity to upgrade to the K-77-M diaphragm with a higher power rating. It has ribbon leads. Quote Link to comment Share on other sites More sharing options...
OO1 Posted October 10, 2022 Share Posted October 10, 2022 16 hours ago, 13Hertz said: can it be repaired? the chances are very slim but it's not impossible , it can only be repaired if there is a section leftover of the old leads , and , the tweeter VC windings must not be damaged . you would need a large magnifying glass to check the damage , 1st remove the diaphragm , flip it over , remove the gasket do you see any leads coming out of the voice coil on both polarities ? yes , you can repair it , no , it's toast Quote Link to comment Share on other sites More sharing options...
KT88 Posted October 10, 2022 Share Posted October 10, 2022 Well, it's a very personal decision, but if I were you @13Hertz I would continue to use your Alnico magnets. They are rare these days and tomorrow they will be in high demand. BTW I would leave the repair to a professional. 1 Quote Link to comment Share on other sites More sharing options...
mark1101 Posted October 10, 2022 Share Posted October 10, 2022 I have two of those drivers (no horns) available now in the garage sale. Would fix you up cheap. Quote Link to comment Share on other sites More sharing options...
13Hertz Posted October 10, 2022 Author Share Posted October 10, 2022 You Klipschians are SO AWESOME, I swear to God. Thanks for all the responses and info. Considering purchasing 2 new aftermarket diaphragms from Simply Speakers for about $22 each to replace both. Pretty sure they will do the trick, but can anyone comment as to whether or not the horns will sound the same? Worse? Better? Any other sources for these diaphragms? @ Mark 1101: I'm also going to check out your drivers for sale - thanks for bringing that to my attention. Quote Link to comment Share on other sites More sharing options...
OO1 Posted October 10, 2022 Share Posted October 10, 2022 keep us posted once you try these ...... Quote Link to comment Share on other sites More sharing options...
Deang Posted October 10, 2022 Share Posted October 10, 2022 Those are junk. Stay away. Buy the Klipsch part from the folks below. https://reconingspeakers.com/products-page/klipsch-k77f-127126-diaphragm/ 2 Quote Link to comment Share on other sites More sharing options...
KT88 Posted October 10, 2022 Share Posted October 10, 2022 @13Hertz Yes please, don't buy the cheap diaphragms. I bought them last year thinking they were high quality. But they are the cheapest from China. Follow Dean's advice and buy reasonably good spares from his recommended source. My garage measured my old diaphrgms and they refused to fit my cheap new ones. They were really right. Unlike the Atlas diaphragms after 50 years, the K77 ones are still very good. 1 Quote Link to comment Share on other sites More sharing options...
13Hertz Posted October 10, 2022 Author Share Posted October 10, 2022 Understood - thanks very much for the sage advice on this - I definitely do NOT want to have my tweeters sounding anything other than exactly as they sounded when they left the assembly line in Hope back in 1977. 1 Quote Link to comment Share on other sites More sharing options...
Islander Posted October 10, 2022 Share Posted October 10, 2022 Heresys, or any other Klipsch Heritage Series speakers, are premium products and should never be repaired with cheap parts. Klipsch parts will maintain their high performance, while 2nd-grade parts will compromise it. Even if the cheaper parts are much cheaper, they're false economy, since they'll downgrade your fine speakers. 1 Quote Link to comment Share on other sites More sharing options...
tigerwoodKhorns Posted October 10, 2022 Share Posted October 10, 2022 20 hours ago, OO1 said: the chances are very slim but it's not impossible , it can only be repaired if there is a section leftover of the old leads , and , the tweeter VC windings must not be damaged . you would need a large magnifying glass to check the damage , 1st remove the diaphragm , flip it over , remove the gasket do you see any leads coming out of the voice coil on both polarities ? yes , you can repair it , no , it's toast You should be able to take a multi strand speaker wire, unwind it and use one or two of the thin wires to repair this is you are very good at soldering. Quote Link to comment Share on other sites More sharing options...
KT88 Posted October 10, 2022 Share Posted October 10, 2022 If this tweeter is to be repaired, the first thing to do is to carefully detach the diaphragm from the wrong side. The diaphragm must be placed with the dome facing forwards on the plastic part where the fine wires must be soldered on.. It sticks to the magnet, wrong side, but before soldering the connections it has to be detached from the magnet and only at the very end of the repair the magnet is carefully guided through the 4 screws to reassemble it. In this way, it is safely immersed in the sensitive voice coil. Quote Link to comment Share on other sites More sharing options...
Deang Posted October 11, 2022 Share Posted October 11, 2022 2 hours ago, tigerwoodKhorns said: You should be able to take a multi strand speaker wire, unwind it and use one or two of the thin wires to repair this is you are very good at soldering. You also have to desolder the old lead. All of this has to be done without melting the plastic housing. Good DIY project for someone with good skills. 1 Quote Link to comment Share on other sites More sharing options...
13Hertz Posted October 11, 2022 Author Share Posted October 11, 2022 12 hours ago, Islander said: Heresys, or any other Klipsch Heritage Series speakers, are premium products and should never be repaired with cheap parts. Klipsch parts will maintain their high performance, while 2nd-grade parts will compromise it. Even if the cheaper parts are much cheaper, they're false economy, since they'll downgrade your fine speakers. 100% agree - and it's only the Cheapskate within me that would lead me to even considering "economy" solutions for my Heresy's. 1 Quote Link to comment Share on other sites More sharing options...
13Hertz Posted October 11, 2022 Author Share Posted October 11, 2022 as OO1 suggested, I looked closely at the diaphragm that I stupidly damaged by disassembling the K-77 the wrong way and I see that there is copper wire still connected to both POS and NEG sides of the unit (about 1/4" of super fine wire). Also, on my K-77, there's no plastic parts - it's all metal. The diaphragm sits down into a metal dish and the diaphragm seems to have a cardboard gasket attached to the back of it (maybe fused to it over time?). Not sure. It can't hurt for me to try and repair this diaphragm using the method suggested by tigerwoodKhorns - sounds......possible.....but, I doubt my chances are very good at success due to my less than expert soldering "skills". I'll let you guys know how it turns out. Also, since there is wire still connected to the diaphragm, I was able to get my meter on it and confirm that it has continuity. That's good news. Quote Link to comment Share on other sites More sharing options...
13Hertz Posted October 11, 2022 Author Share Posted October 11, 2022 12 hours ago, KT88 said: If this tweeter is to be repaired, the first thing to do is to carefully detach the diaphragm from the wrong side. The diaphragm must be placed with the dome facing forwards on the plastic part where the fine wires must be soldered on.. It sticks to the magnet, wrong side, but before soldering the connections it has to be detached from the magnet and only at the very end of the repair the magnet is carefully guided through the 4 screws to reassemble it. In this way, it is safely immersed in the sensitive voice coil. Understood - thank you. Quote Link to comment Share on other sites More sharing options...
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