Replacement Driver Help


Hello All,

Have an elderly pair of Mirage M-1s that are definitely showing their age. Recently, one of the 5" mid-range drivers has been giving off a very audible scratchy quality during some portions of a variety of music. I removed the driver this morning and discovered that the surround is also disintegrating. I expect this is not the cause of the failure and would like to replace the diver entirely. I am aware of several sites that retail replacement drivers, but am wondering what parameter in addition to proper size should I be looking for. The speakers are rated at 6 Ohms nom and 4 Ohms min. How much should I worry about this? IOWs, will an 8 Ohm replacement driver do the trick?

Thanks,

IAN
isgau8
Excellent. Speaker Exchange will likely come in handy in the future as, like me, these old guys are reflecting the years. Like the speakers a great deal and wish to keep them going for as long as I can.
If you don't get it figured out and have a good working driver, I would be willing to spec the driver and help find a replacement for you.  
Seems I have fixed the problem via a repair of the surround. Thanks all for the help as always.

IAN