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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
shumi's avatar
shumi OP
6 posts
 
Thanks for the responses guys. I am indeed concerned about my hearing. I have done a lot of bird hunting and I fear my right ear may have some damage. I need to have it checked for sure. I also listen to concert videos at 80dBs. My right front speaker blows a tweeter more than once a year. I have loved these speakers for many years but it may be time to let them go. My 9.4 system is made up of:
2 SCIVA s front LR
1 HRCC center
4 SCIII rear and LR surrounds
2 SCIs for front wides LR
brauser
525 posts
 
I agree with Rja. Something is definitely not right if you are blowing tweeters at that rate. I have just about every speaker model John ever designed and most of the units have worked perfectly for many years without replacing a thing. I have a special attachment for the SC-IVs. I hope you can find a solution without feeling the need to replace them. I have an HT set up very similar to yours and find the synergy of an all Dunlavy system to be amazing. I am curious about your electronics??
rcprince
3,070 posts
 
Agree with Rja and Brauser about blowing tweeters; I had Duntech Princesses (another Dunlavy design very similar to the SC IVs) for 12 years and never blew any drivers, and I played them plenty loud. I also would like to know what electronics you're using.
shumi's avatar
shumi OP
6 posts
 
All speakers are driven by Theta dreadnaught II amps.2x5 channels.
opus88
530 posts
 
I also owned Dunlavy SC-4s, for 18 years. Never once blew a driver.
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