Audax’ Data (we think):

Fs = 35.00 Hz
Qms = 2.7700 
Qes = 0.2952
Qts = 0.2668
Vas = 25.32 Liters
Cms =  2.2763E-3M/N
Re = 6.60 Ohms
BL = 6.68 N/A
Sd = 0.0089 Sq. Meters
Mms = 0.00908 Kg
Ref Efficiency = 0.354 %
Predicted Output = 87.68 dB/1W/1M
Predicted Sensitivity =  88.52 dB/2.83v/1M
Xmax = 6.35 mm