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In step #4 on the previous page, we recommended that you begin with both knobs at their midway“5”setting, but the two Pre-Amp knobs can in fact be set to any blend you like. However, you will usually want to avoid setting both to their maximum “10” position since this setting will almost always result in undesirable distortion. 8. When you have settled on a Pre-Amp balance, the next step is to adjust the two Contour (bass and treble equalizer) controls to taste. For more information, see the “Ab