Specs Design : Two-way bass reflex Drive units : 5.25" aluminium , Uni-Q 1" vented aluminium dome HF Frequency response : 3dB , 49 Hz - 40 kHz Crossover Frequencies : 2.5 kHz Amplifier requirements : 10 - 100 W Sensitivity (2.83 V / 1 m) : 86 dB Maximum output (SPL) : 107 dB Impedance : 8 Ohm Weight : 5.9 kg Dimensions (H x W x D) : 300 x 180 x 272 mm