tswei Posted January 2, 2016 Share Posted January 2, 2016 I am experiencing some really bad congestion/sibilance/resonance in my early 80s La Scalas with K-55-V mid horns. Does this mean I've got blown diaphragms?? It's clearly the mid horn as I do not hear this on my other systems and it's quite pronounced when I put my ear near that driver as these tracks are playing. It's a raspy sort of distortion. Any advice would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
mungkiman Posted January 2, 2016 Share Posted January 2, 2016 Try tightening the driver onto the horn first. 1 Quote Link to comment Share on other sites More sharing options...
djk Posted January 4, 2016 Share Posted January 4, 2016 Try removing the elliptical filter. Quote Link to comment Share on other sites More sharing options...
Bossman Posted January 4, 2016 Share Posted January 4, 2016 You can measure the ohms of the midrange driver with a multimeter since it is easily accessible. Quote Link to comment Share on other sites More sharing options...
Matthews Posted January 4, 2016 Share Posted January 4, 2016 I have a spare K55V driver if you find you may need it... 1 Quote Link to comment Share on other sites More sharing options...
Frzninvt Posted January 6, 2016 Share Posted January 6, 2016 There are no replacement diaphragm's for the K-55M last that I heard, you would have to modify a K-55V diaphragm to work in the M. Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted January 6, 2016 Share Posted January 6, 2016 OP said he had K55V's not M 1 Quote Link to comment Share on other sites More sharing options...
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