What cable are you using to connect the G10 or G30 receiver to your amp? Shorter is better and something made with mogami or equivalent will be even better, And seriously you are looking at entry level wireless and wondering how much you have to spend? to give you some idea how good the G30 is as a deal, some of the transmitters used on Broadway shows are $3000 - $5000 each (without the receiver). Funny thing is the G30 will likely sound as good or better since it has flatter response and no compander.