I am currently looking at a couple of pairs of UHF tweeters to add to my S7R's. One is a pair of O77 8 OHM glass tweeters and the other is a pair of 2405 Slot 16 OHM tweeters. I have been told and I have read differing opinions on this issue, 16 vs. 8 OHM UHF tweeters. I need to know if it is going to present a problem if I use the 077's in the existing system where the drivers are 8 OHM, or if I need to stay with 16 OHM tweeters. I have read and been told that all the tweeters, whether 16 or 8 OHM, test out the same and mixing them would not be a problem. Does anyone know categorically whether this is true or not? Any help would be greatly appreciated.