shaman Posted September 29, 2003 Share Posted September 29, 2003 Can anyone help me in dating my k-horns? Serial nos are lf 8917676/lf8917692. Tweeter is k-77m, squawker k-55m. Crossover is ak-2. Can anyone tell me anything about this crossover at all. Would there be any benefit in changing the crossover?many thanks. Quote Link to comment Share on other sites More sharing options...
Frzninvt Posted September 29, 2003 Share Posted September 29, 2003 Your Klipschorns are from 1989, the AK-2 is one of the least desireable crossovers to have. They are easy to convert to an AK-3 which was the subsequent model produced. Just replace the (2) 70uf capacitors housed on the woofer access door with a single 100uf Solen "Fast Cap" or equivalent. You also need to replace the 4mh coil in the midrange circuit with a 5mh coil. The parts were about $80 and it took me about 30 minutes to do both. If you really want to go crazy you can replace all the components with those of higher quality. I intend to replace the 13uf cap in the midrange circuit with one of a higher quality next. I would love to have a set of Al's crossover but they are a little pricey for me. Quote Link to comment Share on other sites More sharing options...
shaman Posted September 29, 2003 Author Share Posted September 29, 2003 Thanks for the information. What sort of sonic differences will I notice by making the changes you suggest? Quote Link to comment Share on other sites More sharing options...
Frzninvt Posted September 29, 2003 Share Posted September 29, 2003 Tighter sounding bass, and a more articulate midrange response. Klipsch used the old iron core coils, the more modern air core coils are much better. Don't get me wrong those Khorns will sound real good as is, these changes just make them better. Quote Link to comment Share on other sites More sharing options...
JohnA Posted September 29, 2003 Share Posted September 29, 2003 Search Technical or Updating for the schematics. Then you can see what the differences between the two crossovers are. The AK-2 and AK-3 are quite similar and both should sound pretty good if they are working properly. The AK/AL/AB networks are the really bad ones. If you rebuild yours (or just build new ones) using polypropylene film and foil caps and premium air-core inductors, they will sound noticibly better. The cost is why Klipsch did not use those components until the 2002 K-horn (Type AK-4 network). Quote Link to comment Share on other sites More sharing options...
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