Step 1: Check the line
First of all, according to the drawings, carefully check the line connection to confirm that the sound is no problem in this regard.
Step 2: Set the initial state of the audio device
Set the initial state of the device, set the amplifier input to minimum, and set the input and output knobs of all peripheral devices to 0 dB position or intermediate position. Power on in order from the previous stage to the next stage (without turning on the power amplifier), check that all equipment is powered on, and then power on the amplifier.
Step 3: Preliminary check system status
Properly turn on the gain control of the amplifier, put a familiar music on the CD, and adjust the mixer input level to the basic normal position. Slowly push up a little mixer fader, listen to the sound from the speaker is normal, whether it is distorted, if it is not normal, immediately shut down and check.
Step 4: Phase adjustment
If the combination of ultra-low frequency and full frequency is used at the same time, due to the existence of the frequency division system and the installation position, there may be phase problems caused by cross frequency interference or delay time difference, so phase adjustment is required.
Step 5: Speaker and system polarity detection
After the system is basically normal, turn on all the power supplies, set the power discharge level to the maximum, pull down the mixer output fader, the phaser generator is connected to the mixer input channel, turn on the phase meter power supply to adjust the output gain and the mixer input gain. To the mixer indicator table is 0 decibels.
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