Overall, a really nice set of components for the price. Quality seems great. Mid to highs are very clear and precise, but as other reviewers mentioned, the highs (S's especially) can be a little harsh at times, even with the -6db mute button pressed on the crossover. The tweeter body's and mounting cups are rather large, which may or may not limit your mounting locations. It forced me to put mine in the door panel, which could explain some of the harshness due to poor angle. They are listed as 2 ohm impedance, but like one reviewer mentioned mine are ~3.2ohms at the speaker, and a little more when measured through the speaker wire. The crossovers are really nice... count on losing that tiny hex key though. These things shine with a little juice... it would be a great injustice to power these by the headunit or a poor quality cheap amp.