Bass unit 2 x 125 mm (5.0 in) Treble unit 1 x 25 mm (0.9 in) Frequency response(-6dB) 67 Hz – 30 kHz. Nominal impedance 6 Ω Minimum impedance 3.7 Ω Sensitivity (2.83V @ 1kHz)90 dB/w/m. Recommended amplifier power 25-150 W. Crossover frequency 2.1 kHz