Power RMS / max.100 / 200 Watts Frequency response45 Hz – 25,000 Hz Impedance4 Ω Efficiency 1 W / 1 m90 dB Cone materialTW: Coated silk dome M: W: Basalt-fiber-paper compund Crossover6/12 dB with bandstop filter, tweeter protection and tweeter level adjustment Outer diameterTW: 51 mm / 2.0″ M: – W: 165 mm / 6.50″ Installation diameterTW: 45 mm / 1.77″ M: – W: 143 mm / 5.63″ Installation depthTW: 14 mm / 0.55″ M: – W: 65 mm / 2.56″ Dimensions crossover112 x 77.5 x 27 mm / 4.41 x 3.05 x 1.06″ Scope of delivery: 2 x Tweeter HELIX S 1T incl. mounting material 2 x Woofer HELIX S 6B 2 x Flex-Crossover 4 x Foam sheet 1 x Mounting material 1 x Instruction manual 1 x Mounting pattern.