Tang BandW4-1749S Coaxial 4″ / 102 mm Nominal diameter 60 Hz Resonance 0.34 Q factor 88 dB Sensitivity ± 0.9 mm Linear excursion 50 W Program Power Impedance Excursion Velocity SPL Phase Group delay Step response Tone Burst Ω°0102030405060101001 00010 000-180-120-60060120180Electrical Impedance...