Hi guys, I read here last time that you can set the filters with a multimeter to the -3dB point, but find that no longer. Procedure was the following: – give sinus tone to the level with desired separation frequency – completely turn the filters back, measure the voltage at the LS terminals and remember – turn the filters in the direction of separation frequency until the measured voltage exactly halved Kind of lights up…you say double power brings +3dB, vice versa should Is that so correct? Is that because slowly everything for active operation together…Soft, cable, level, Domis By the way, has become a protovision reality who cares. Greeting to all Rafael