Hey, I played a show on Saturday night and noticed that my mic level was quite a bit lower than it should be, especially compared to the 3 other vocal mics in my group. I use an SM-58 and was getting maybe half the volume of the other SM-58s used. Settings on the board were tinkered with, channels changed, etc. Changed mics out to a backup 58 and BAM...twice as loud. What can I look for as far as repairing my existing SM-58?? Is there anything that can be done? I don't have the cash to replace it right now.