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Determining the correct specifications of my subwoofer? Answered

I have purchased a local brand sub-woofer which does not comes with any specifications except the following:
Impedance: 4 Ohms
Output RMS:20 Watts
Frequency Response: 40Hz~170Hz
Effective Cone Diameter(D): 4"
However i wanted to know the following
Equivalent Volume(Vas)
Free Air Resonance (Fs)
Total Q (Qts)
Actual System Q (Qtc)
Resonance Frequency (Fb)
Is there is any way to determine these
Thanks in Advance....


Not without the proper equipment to measure those characteristics.

Like a sound proof chamber and proper audio testing equipment. Which would cost big bucks. It would be cheaper to get a nice set of speakers that already have that information on the box for you.