Feature One-piece 1? (25 mm) tweeter with German made pure titanium dome, embedded in the highly damped plastic housing Rugged metal basket woofer with polypropylene cone Compact-sized, chassis-mounted crossovers Specifications Diameter T/W: 1? (25 mm) / 6?8? Power Handling: 50 W RMS / 150 W Max. Frequency Response: 36 ? 28.000 Hz Impedance: 4 ê Crossover Frequency: 4.500 Hz Sensitivity: 91 dB (1W/1m)