I recently replaced drivers in my SC-IVa's. They are Vifa's and are available at either http://www.madisound.com/
or
http://www.partsexpress.com/
I purchased them from Madisound, which has a chart for the replacements. They are the exact drivers in your speakers and are easy to replace. A few screws and two plugs. They are not expensive, either. Just be sure you get the correct model number, which is tagged on your tweeters.
--Neil
or
http://www.partsexpress.com/
I purchased them from Madisound, which has a chart for the replacements. They are the exact drivers in your speakers and are easy to replace. A few screws and two plugs. They are not expensive, either. Just be sure you get the correct model number, which is tagged on your tweeters.
--Neil