Overall Diaphragm Diameter: 2.75"
Voice Coil Diameter: 1.75" with titanium dome.
Impedance: 8 ohms.
DCR is 6.5 ohms.
Here is the list of some of the model #'s:
Berhinger: 44P60A-8
Mackie: DC10/1701-8, SRM-450 version 1, C300Z, 0008093, 0025666, SA-1521 (will not fit the SA-1521Z), SR-1522, SR-1522Z, S-215, S-225, S408
P-Audio: BMD-440, BMD-450