If it is the 1997 version, X10-4, here are the specs:

FS = 26.17hertz
Qms = 7.729
Vas = 4.838 cu.ft
Mms = 1.564 oz
Xmax = 0.293 in
Sd = 52.7 sq.in
Qes = 0.458
Re = 3.11 ohms
Le = 0.241 mH
Z = 4 ohms
BL = 1.581 lb/A
Pe = 300 watts
Qts = 0.432
1-W SPL = 89.58 dB

Little bit different from the ones above^^^^