We played a pub last night with the crappiest PA I've ever heard. Sounds like it cost them about $50 from Walmart. Two 1-12 monitors on poles and a small mixer. Cant remember the brand, and uh.. really don't want to. This is our second time playing this place. The second time out I figured I'd bring an eq pedal and see if I could do *something* to enhance the vocals. So I haul out my trusty Boss bass eq pedal and give it a drastic smiley face. It definitely improved the sound considerably. However, during the middle of the second set all hell broke loose. We began to hear a low feedback sound. Make adjustments still not gone. Then it starts really get loud with a low howl. We have to stop in the middle of the song and figure this out. Shut off all the microphones. Still going and getting louder. Unplug one of the monitors. Still going. Finally the drummer reached over and unplugged the other monitor and it stopped. That was the worst *technical* fiasco we've ever experienced in the last 50 gigs. Little bit embarrasing but what can you do I guess. So I took the eq pedal out of the signal chain and again the vocals sounded like someone was singing thru a mic'd telephone. Ugh. At least I didn't blow it up though.