Focal Utopia Be No.7 6.5-Inch 3-Way Component Speaker Kit with Crossblock TBe pure Beryllium inverted dome tweeter W composite sandwich cone delivers extreme linearity over a wide frequency range without any low frequency distortion Crossblock stereo filter offers 4,480 combinations of electrical adjustments to uniquely harmonize the system for any specific installation Aluminum alloy basket provides strength as well as optimal heat transfer and good vibration damping High power neodymium magnet