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Dunlavy SC IV A harsh high frequency

I have owned my SC IVA for many years. I replace the blown tweeters at least once a year. I know the original set were carefully matched at the factory but I can not duplicate the tecniques which John used in his shop to optimize response. The speakers sound glassy and I wonder if this is as a result of tweeters I have installed but would have been rejected by John. I have done a lot of work with room treatment,changing source, components, etc...
Are there any recommendations for fixing this issue?
Replace the Vifa tweeters with more expensive ones?
Thanks
128x128shumi

Showing 1 response by pbnaudio

pbnaudio's avatar
pbnaudio
1,610 posts
 
Swampwalker makes a very good observation :-) especially with a first order crossover design like the Dunlavy where the crossover offers very little protection for the tweeter as far a power handling goes.

Dweller, I don't think Dunlavy used Electrolytic capacitors in at least the tweeter section of the crossover, I would assume that he used polypropylene capacitors which have a much longer lifespan than the 10 years you mention. Below is a link to a informative description on a XO modification the the speaker

Dunlavy X0 Modification

Best of Luck

Peter
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