How do these specs sound?

[KenC210]

Re = 3.6101 ohms

Fs = 50.23 Hz

Zmax = 67.0586 ohms

Qes = 0.56

Qms = 9.6195

Qts = .525

Le = 3.03 mH (at 1 kHz)

Diam = 161.9250 mm ( 6.3750 in )

Sd =20592.9093 mm^2( 31.9191 in^2)

Vas = 0.174 ft^3)

BL = 15.95 TM

Mms = 121.1156 g

Cms = 58.6146 uM/N

Kms =17060.6094 N/M

Rms = 3.9806 R mechanical

Efficiency = 0.1388 %

Sensitivity= 82.37 dB @1W/1m

It is an 8" woofer i plan on getting 4 of these if the specs seem any good. I just cant understand much of the specs... i tried read this post>>> http://www.stevemeadedesigns.com/board/topic/83029-everything-you-need-to-know-about-car-audio/

[Lbox88]

Link to woofer?