Power RMS / max. 70 / 140 Watts Frequency response 75 Hz – 25,000 Hz Impedance 4 Ω Sensitivity 1 W / 1 m 89 dB Cone material TW: Coated silk dome M: W: Basalt-fiber-paper compund Crossover 12/12 dB with bandstop filter, tweeter protection and tweeter level adjustment Outer diameter TW: 51 mm / 2.0″ M: – W: 102 mm / 4.01″ Installation diameter TW: 45 mm / 1.77″ M: – W: 92.3 mm / 3.63″ Installation depth TW: 14 mm / 0.55″ M: – W: 46.5 mm / 1.83″ Dimensions crossover 112 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 4B 2 x Flex-Crossover 4 x Foam sheet 1 x Mounting material 1 x Instruction manual 1 x Mounting pattern