Model Car specific 2-way speakers Diameter 200 mm / 7.87″ Power Handling (RMS/max.) 80 / 140 Watts Impedance 4 Ohms Efficiency 89 dB Frequency Response 40 Hz – 20 kHz Tweeter 28 mm / 1.1″ silk dome Midwoofer Carbon fiber cone Crossover 18 dB/oct high pass filter (Tweeter) / 6 dB/oct low pass filter (Woofer).