did some homework on a good wireless for the buck. i decided on the sennheiser evolution 100. heard nothing but good about them, good construction, good performance, selectable freq's etc. i love the features and construction, but it sounds like TOTAL SHIIIIITTTEEE!!!!!!!!!!!!!!! "oh, have you tried": new battery - YES different frequency - YES adjusting squelch - YES adjusting sensitivity - YES different cord (to amp) - YES different bass - YES different amp - YES different environment (building, outside, inside) - YES adjusting audio out level - YES still sounds the same, like shhiiiiittte!!! i have tried everything and this system just sounds like a bass guitar with a bad connection somewhere (bass with farty gravelly hissy pissy noise going on at the same time) especially through a 4000 watt PA. a friend who works at guitar center, bought it at cost and lost the receipt. what the hey am i supposed to do now????? there is nothing better than going into the crowd and hearing your band while you say hi to friends and family who show up. a wireless allows this. HELP!!!