Overall Diaphragm Diameter:  3"

Voice Coil Diameter:  1.75" with titanium dome.

Impedance:  8 ohms

Here is a list of the driver part #'s:
2418, 2418-1, 2418-8, 2418H, 2418-H, 2418H-8, 2418H-1

Here is the list of some of the cabinet model #'s:
EON Series:  EON 15, EON POWER15, EON POWER15-G2, EON15P-1/230 
MR Series:    MR902, MR905, MR922, MR925, MR926, MR935, MR938