Can I Still Use Wireless Mic System With New Mics?
Hello,
at my job we use a portable wireless mic system for presentations and such. We run it through a fender passport speaker system. It’s about 3 years old now and originally came with 2 wireless mics. Both of mics are now kaput, but the receiver unit is still good. Is it possible to replace the wireless microphones with new ones? How will I know if they are compatible with the receiver? I can provide the model number and specifics and all that if need be. Help!

get them from the same manufacturer as the original
i have some bad news though, many of the wireless systems were illegal and the FCC has come down on manufacturers to stop non-licensed sales. a number of the channels were in the old UHF television band that has been reclaimed for other use because of the DTV transition.
if you are caught in this mess, it might be better to just start over making sure you have legal new equipment.