Re(ohms) 4.80 Fs(hz)38.52
Le(mh) 1.10 Mms(g)92.80
Qm 8.82 Cms(mm/N).1840
Qe .470 Rms(Ns/m)2.5464
QT .450 Vas(L) 189.55
Xmax(mm) 4.80 Sd(cm^2)856.34
BL(Tm) 13.59 EBP 82.00
EEF(%) 2.22 SPL(db)95.50

jbl 12" subwoofer, neoprene surround, 2" kapton 4 layer voice coil, 40 oz ceramic magnet. price $40 CDN ea.

Re(ohms)5.30 Fs(hz)24.80
Le(mh) 3.44 Mms(g)97.81
Qm 8.14 Cms(mm/n)418.47
Qe 0.331 Rms(Ns/m)1.88
QT 0.318 Vas(L)164.30
Xmax(mm)4.20 Sd(cm^2)0.053
BL(Tm) 15.18 EBP 75.00
EFF(%) 1.92 SPL(db) 91.00

cheers,

george