raburns Posted December 5, 2013 Share Posted December 5, 2013 (edited) I have the Khorn with Type AA networks, I read where these protection circuits compound distortion. I have K-77 round tweeter. Is this true? Should I bypass them? What do you think? Edited December 5, 2013 by abby2011 Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted December 5, 2013 Share Posted December 5, 2013 I have the Khorn with Type AA networks, I read where these protection circuits compound distortion. I have K-77 round tweeter. Is this true? Should I bypass them? What do you think Funny you should ask. When I was at Paul Klipsch's house he had to swap out some RCA connections to play me some of his recordings. You could hear him ***** and swear as you heard buzzing from unplugging and and plugging those stupid RCA connector that disconnect the ground before the positive terminal. This type of activity can fry K-77's so PWK added the Zeners to protect tweeters. They have no effect on the sound. 1 Quote Link to comment Share on other sites More sharing options...
raburns Posted December 5, 2013 Author Share Posted December 5, 2013 Great story, better memories I'm sure. Thank you for the knowledge, I'll never forget that example. Quote Link to comment Share on other sites More sharing options...
tigerwoodKhorns Posted December 5, 2013 Share Posted December 5, 2013 If you don't like them, just add a fuse for the tweeters. Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted December 6, 2013 Share Posted December 6, 2013 If you don't like them, just add a fuse for the tweeters. Murphy's law corollary #49: When struck with a full DC rail "hammerblow" in the above example at PWK's house, the voice will always blow to protect the fuse. Fuses are too slow compared to the speed of those fat zeners. Had mine for 30 years without an issue. Quote Link to comment Share on other sites More sharing options...
Steve R Posted December 6, 2013 Share Posted December 6, 2013 (edited) I was researching crossover builds for my Khorns and ran acroos this old thread , it may help , may not but I found it interesting. https://community.klipsch.com/index.php?/topic/31771-aa-xover-modification/page-3?hl=+lamp%20+tweeter Edited December 6, 2013 by Steve R Quote Link to comment Share on other sites More sharing options...
tigerwoodKhorns Posted December 6, 2013 Share Posted December 6, 2013 If you don't like them, just add a fuse for the tweeters. Murphy's law corollary #49: When struck with a full DC rail "hammerblow" in the above example at PWK's house, the voice will always blow to protect the fuse. Fuses are too slow compared to the speed of those fat zeners. Had mine for 30 years without an issue. Not doubting you, but I built a set of AKL's many years ago and in a dark room one night the fuse went off like a firework. Saved my tweeters. I used the fuse that was recommended in the build. Was I just lucky? Quote Link to comment Share on other sites More sharing options...
babadono Posted December 6, 2013 Share Posted December 6, 2013 I have the Khorn with Type AA networks, I read where these protection circuits compound distortion. I have K-77 round tweeter. Is this true? Should I bypass them? What do you think Funny you should ask. When I was at Paul Klipsch's house he had to swap out some RCA connections to play me some of his recordings. You could hear him ***** and swear as you heard buzzing from unplugging and and plugging those stupid RCA connector that disconnect the ground before the positive terminal. This type of activity can fry K-77's so PWK added the Zeners to protect tweeters. They have no effect on the sound. Was this at a moment of forgetfullness? Never plug or unplug any connector that doesn't make ground connection first with the power on. Or better yet never do it with ANY connector. At the very least turn off your power amp Quote Link to comment Share on other sites More sharing options...
Deang Posted December 6, 2013 Share Posted December 6, 2013 Well, since he had zener diodes in his tweeter circuits, he didn't need to concern himself with proper protocol. Quote Link to comment Share on other sites More sharing options...
mark1101 Posted December 6, 2013 Share Posted December 6, 2013 Honestly, I don't understand how people fail drivers. I have been using Klipsch since I was 18 (35 years). I've had countless pairs, modified networks, etc. I've never broken anything. I NEVER use fuses nor diodes. I removed them in all my speakers, Khorns, etc. Every network I had Dean or ALK build for me I specified with no protection. Most of these I still have. Makes me think people that breaks this kind of stuff don't know what the hell their doing. Quote Link to comment Share on other sites More sharing options...
tigerwoodKhorns Posted December 6, 2013 Share Posted December 6, 2013 My Peach had a bad volume pot. These things happen. Quote Link to comment Share on other sites More sharing options...
Deang Posted December 6, 2013 Share Posted December 6, 2013 (edited) Never mind. Edited December 6, 2013 by DeanG Quote Link to comment Share on other sites More sharing options...
djk Posted December 7, 2013 Share Posted December 7, 2013 A friend of mine had some ADS L810, a Tandberg TCD310, and a Hafler DH500. When you stopped the Tandberg it would put out an almost inaudible 'click'. Of course it was rail-to-rail (180V P-P) into the tweeter. After replacing the tweeters a couple of times I installed Klipsch zener diode protectors. End of tweeter problems. Quote Link to comment Share on other sites More sharing options...
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