Dunlavy SC4 Speakers

Dunlavy replaced the tweeters 3 different times because there were improvements to the dome and suspension from Vifa. There was no model call out on this that I was in formed about. I know this because I worked for a dealer in the early 90's and each time I replaced the old with the new. There was a slight improvement in sound. The Dunlavy's had mediocre parts selection at best. I had done extensive mods. The biggest difference was the replacement of the 3 cent resistors for Vishay resistor bridges. Now a days I would use the Duelund's which may be nearly as good in this application and would not have to be custom constructed.This up grade is staggering. John Dunlavy himself told me the resistors would make no difference. Tom

SC stood for signature collection. The original SC-IV's had Morel 10 inch woofers. There was a switch to a version with 10 inch Vifa woofers which is what I owned and was the version most reviewed. I was told by Dunlavy the switch was done because the Morel's had to much variability in sample to sample response. The Vifa mids were improved also..I was supplied those mids as well as improved Vifa tweets along the way. With all those additional changes the speaker was still the IV. The IVa designation came about when the switch was made from Vifa 10's to the Scanspeak drivers. Tom