The TDX68 is a 5" x 7" (6" x 8") coaxial speaker pair that can handle up to 60W RMS power. The TDX, Thunder Dome-Axial, Series speakers are designed to compliment any installation while delivering a full range sound experience for all types of music. In order to get the most out of your music and hear it as the artist that recorded it intended you to. The TDX682 also includes a 15 degree rotating tweeter to assist in obtaining the best imaging based on install location. The TDX Series offers the best full range sound reproduction of any speaker in their class with particular focus on low frequency reproduction where TDX speakers play much lower than other models allowing you to listen to great bass even if you do not want to install a subwoofer.