I had a set of these. Traded on Infinity RS 11B. I used the old dynamo 80 tube amp for tweeter. Sweet sound. I had Phase Linear for muds. I just got tired of midrange panels going out. There are no longer available so be careful. I would not play extremely loud and of course have Good surge protection. At the time they were state of art. Woofer was mushy there was a panel on eBay. That might be good source for parts. Tweeters never gave a problem. There is original set on Audiomart for 4K. Problem nov replacement parts. Good luck. I have the infinity QRS now sound is great. I have never forgotten the midrange and highs on system.