With respect towards everyone's views, my conclusion is that if you are an audiophile these Subaru tweeters probably aren't worth your money or your time. Kinda sounds like if you are like me, an average ear Joe, they may be a significant improvement . No doubt going to the 3.5" woofer/tweeter will render better sound. However, the trade-off is more work is required for the installation. I could handle the installation , but if I upgrade at all makes more sense to me to just drop in the "plug and play" Subaru tweeters.