Why is it I get such a range of input levels into our desk? If you take each PFL to balance before it reachs red on our desk - our mics and guitar line in allow for plenty of scope on the slider, but our fiddle input (either plugged staight in or slightly better with pre-amp) and radio mic have nearly maxium gain and full on the slider to compete. In total contast the line in from our ipod needs only min gain and min power on the slider and still nearly blows the roof off! Not very well articulated for those of a technical perspective but am trying to find out why some inputs have loads of power and others have very little