Replacement Diaphragm For Technical Pro ROX-10 ROX-12 ROX-15  

Overall Diaphragm Diameter: 2.56" (65mm) 

Voice Coil Diameter: 1.35" (34.4mm) 

Nominal Impedance: 8 ohms 

DCR is about 6.5 ohms.

Also Fits for Technical Pro MAX1001, MAX1201, MAX1501, POWER1001, POWER1201, POWER1501, POWER12USB, POWER15USB, ROX-10, ROX-12, ROX-15 speakers and many more.