There's no way it was 142 dB. There are sound limit ordances in most towns and they won't allow the venues to go over whatever that limit is (and more aren't more than 125 dB). That said, I think you're running into the same problem I've run into with the QTC-1 mics. They are just WAY too sensitive and require some serious attenuation prior to going into the pre-amp. For the QTC-1 mics I run the Wendt X4 with the -20 dB pads on and in addition to that I run the AT 8202 inline attenuators at -20 dB. If I don't do this, nothing but distortion at rock shows. I've been able to get away with just the -20 dB setting on the X4 for bluegrass shows, but that's acoustic only. If you can round up an external attenuation, try that and see what happens. My guess is that you will find it works fine at that point.
Wayne