I purchased these tweeters strictly on the JL Audio brand name alone. I did look at the specs and also considered the Infinity Kappa tweeters since I have 2 pairs of Kappa 6x8s in my doors. The reason I chose these tweeters over the Kappas is that with JL Audio I know the ratings are going to be accurate and the quality is going to be excellent. Also I knew these were going to be surfaced mounted and they are nice and small, the Kappas are 1 inch and are better for flush mounting. Now that I have these hooked up my system really sounds great. Its amazing what these little half inch tweeters are capable of. I have them powered by a 4 channel amp and they really capture the highs nicely. Highly recommended tweeters. One more thing I want to mention I bought these tweeters from sonic electronixs ebay store for only 62 dollars.