No idea. Just quite simply I have no idea. I was in a band with guys and they used them and they didn't work anymore. That's all I know. $6 will put them on your front door.
I'm extremely tempted. I don't have many mics and would love to give the MXL's a go. I could probably find a way to get them fixed...so yeah, I'll take them. Now where do we go from here?