Aurum Cantus AC-165   Technical data Nominal power (P)：60W Sensitivity(SPL)：89dB Rated impedance(Z)：8Ω Frequency range：32-8000Hz Resonance frequency(Fo)：32Hz DC resistance(Re)：7Ω Mechanical quality factor(Qms)：3.356 Electrical quality factor(Qes)：0.356 Total quality factor(Qts)：0.322 Equivalent volume of air(Vas)：55.3L Moving mass(Mms)：10g Effective piston area(S)：133cm2 Suspension compliance(Cms)：2.202mm/N BL product(BL)：6.6N/A Flux density(B)：1.1T Voice coil diameter(φ)：25mm Voice coil height(h)：13mm Voice coil inductance(Lbm)：0.35mH Linear excursion(Xmax)：±5mm Magnet diameter(φ)：100mm Magnet height(h)：20mm Former material：Aluminum Weight of driver(M)：1350g Outer dimensions：163x163/178 mm Cutout dimensions：147mm Frontplate thickness：5mm Overall depth：78mm