Measured using REW, by analyzing the change of impedance-vs-frequency plot when adding a known mass (1.34 g) to the cone.

Thiele-Small parameters
fs 181.7 Hz
Qms 5.902
Qes 0.401
Qts 0.375
Fts 483.8
Mms 1.18 g
Cms 0.651 mm/N
Rms 0.228 kg/s
Vas 0.06 litres
Bl 3.615 Tm
Eta 0.09 %
Lp (1W/1m) 81.67 dB
Dd 3.22 cm
Sd 8.1 cm^2