I'm stumped....I mic'd a band using dynamic mic's and a couple of condeser's and all sounded well. Then several weeks later I mic'd the band again, but the condenser mic's no longer worked. Just the condensers?? Everything was running through a yamaha mixer ( with phantom power). I tested the mic's using another power source and they work fine, so i'v established that the mic's themselves are working. So...I thought, it must be a problem with the mixer...but then why would the dynamic mic's work, and not the condensers? I don't get it??? Help...