3.Open the power amplifier, set the maximum level. 

After determining the system and hardware are normal, connect the device power, turn the power amplifier on,and set the level to the maximum.The tone input gain to the tone indicator table is 0 decibels, slowly push the tone output pusher, according to the size of the sound in the speaker,to achieve the best sound volume.In order to ensure the best debugging effect, it is recommended to use the phase meter detector to check whether each speaker is in the same phase. 

4.Avoid the conference room sound system howling. 

Push the channel lever of the mixer to 0 decibels, put the microphone on the position of the conference podium, open the listening output, find the frequency band that the microphone causes howling, and adjust the equalizer setting to eliminate it.The microphone should be avoided to the speaker, if necessary to adjust the position of the meeting podium.Operation amplitude must be small, let the scream appear can remain in a stable level and then adjust, can be more accurate. 

Conclusion: The most important sound system in the conference room is the early debugging.The sound system debugging in the conference room may be a little complicated, and sometimes it is difficult to achieve good results after preparation for a long time.Everything needs patience and care, and the conference room system sound debugging is no exception, which requires the operator to practice repeatedly, and accumulate experience in the practical operation.