JBL 2406 & 2407 Aftermarket Diaphragm pecs: Outside Diameter: 2.75" (69.85mm) Voice Coil Diameter: 1.5" (38mm) Nominal Impedance: 8 ohms DCR: 4.5 ohms Dome Material: Titanium Voice Coil: Aluminum Wire Here is a list of the driver part #'s: 2406, 2406H, 2406H-1, 2407, 2407H and more. Here is the list of some of the cabinet model #'s: MP412, MP415, Control 322C-CT, AM4215 and more.