音响技术人员必备手册(Sound technical staff handbook) Basic professional audio technicians necessary manual At present, there arest Make sure that the equipment is correctly connected and then check whether the rod, turn and twist of the equipment are in the correct position. Then electrify to see whether the power supply of each device is electrified; turn off the power amplifier output volume potentiometer, playing a familiar music signal (slightly adjust parameter equilibrium with the console in the mixer output (total) will return to output to the OdB vertebral sub), Shiko pushed to the OdB signal channel, adjust the gain, the mixer output level indicator is OdB (the best signal output state). Check the mixer, the surrounding, power amplifier signal, whether the normal display; Turn on the volume potentiometer of the power amplifier slowly (repeat the power amplifier) and check if the corresponding speakers are properly extended (check that the units are normal); pull down the mixer output (return to output) the volume of vertebral, all power amplifier volume potentiometer open to the maximum, then the mixer total output volume and return to the volume of vertebral vertebral sub slowly pushed to the OdB, in the audience area (with the central inspection stage) Pa is balanced (phase is normal). At the same time to determine the signal pressure in the audience area (music and stag
