nominal diameter 100 mm / 4“ midrange & 25 mm / 1“ tweeter compatibility Mercedes-Benz ( look manual ) impedance 4 Ohm / ohms frequency response 70 Hz – 24 kHz cross frequency 5000 Hz power handling (RMS) 70 Watt / Watts power handling (max) 110 Watt / Watts efficiency (SPL) 87 dB resonance frequency 77 Hz (midwoofer) Xmax (p2p) 7 mm / 0.28”