– 6,5″ competition midwoofer Diameter 165 mm / 6.5″ Power handling (RMS/max.) 100 / 250 Watts Impedance 4 Ohms Frequency Response 50 Hz – 10 kHz Voice coil 38 mm / 1.5″ CCA Mounting Ø 145 mm / 5.71″ Resonance frequency (Fs) 56.8 Hz