These DS-18 tweeters deliver a vast improvement in overall sound quality over the factory tweeters, even when used with the factory front 6x9’s and rear 6.5” speakers in my ‘06 Toyota Tacoma (non JBL). They open up the top end so much that equalizer can dial in much more treble/high end. The resulting vocals and hi-end are much cleaner than the stock tweeters, which allows stronger more treble to be dialed in. This also can be balanced with slightly more mid-range and bass. The overall sound is much better. I plan to replace those remaining stock speakers but am very very pleased with the performance of just these DS-18 tweeters.