I installed these in the sound bar of my '98 Jeep Wrangler. Right now they're just running off the head unit, but I will be adding an amp soon. So far they sound awesome even without an amp. The woofers have really decent bass response and the tweeters are crystal clear without being too harsh. They'll distort if I turn up the volume on the head unit too much (about 2/3 of the max volume), but they're loud enough before that ever happens. Obviously, they'll sound better once I add the amp because right now they're being severely underpowered from the head unit, but I'm thoroughly impressed with these speakers, especially for the price.Note: I made sure I sealed the woofers really well by using rope caulk under the spacers. I also added poly-fil behind the woofers, which seemed to tighten up the bass response a lot.