Mid-woofer with sturdy aluminum diecast basket Large coupling volumes for tweeter low crossover frequency Mid-woofer cone with ultra light stiff carbon cone with low resonance CNC milled full Aluminium Tweeter house Lowest manufacturing tolerances and exclusive use of selected materials Frequency crossover with ultra-high Quality components Technical data Power RMS / max. 90 / 180 Watts Installation depth TW: 19 mm M: 38 mm W: 73 mm Frequency response 39 Hz – 20,000 Hz Impedance 4 Ω Efficiency 1 W / 1 m 90 dB Cone material TW: Silk dome M:Carbon W: Carbon Crossover 6/6/6 dB Outer diameter TW: 56 mm M: 90 mm W: 166 mm Installation diameter TW: 45 mm M: 73 mm W: 145 m