HW175 Ciare speaker 16cm bass

HW175 Ciare 16 cm bass driver with paper cone. The cone is equipped with a phase plug.
    power  (continuous/programme) = 120/240 W
    resonance frequency fs = 51,6 Hz
    impedance R = 8 Ohm
    sound pressure level SPL = 91,5 dB (2,83V; 1m)
    DC resistance Re = 6,87 Ohm
    force factor BL = 8,33 N/A
    voice coil inductance L = 0,3 mH
    effective piston radiating area Sd = 138,554 cm2
    effective mechanical mass incl. air load mms = 10,9 g
    equivalent volume of compliance Vas = 21 l
    total Q factor Qts = 0,32 (Qms=4,21, Qes=0,35)
    voice coil diameter = 38 mm
    maximum peak linear excursion vibration xlin = +/- 4 mm
    mounting diameter d = 146 mm
    overall diameter d = 180 mm
    mounting depth (not countersunk) t = 93 mm
    mass m = 2,6 kg