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  • Model: Overview of audio system debugging method
  • Time: 2017-2-4 9:48:57
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1. line inspection: in accordance with the drawings, carefully check the line connection, to confirm no problem.
2. set the initial state of the device, the amplifier input is set to a minimum, the input and output of all peripherals to set the knob to 0 dB position or intermediate position. According to the level of order power level to the former (after first without PA), check all equipment powered, for power amplifier. Professional audio。
3. preliminary check the status of the system: open the appropriate amplifier gain control, into a familiar CD in music, adjust the mixer input level to the normal position. Slowly push point mixer faders, listen to the sound of the speaker can be normal, can not assume normal distortion, immediately shutdown inspection.
4.The  speaker system and polarity detection system: basic normal, open all the power supply equipment, power level setting at the maximum, pull down the console output faders, phase meter attack is connected into the mixer input channels, open phase meter power to adjust the output gain and gain mixer input to the mixer indicator is 0 db. Slowly push the fader console output, etc. a sound box "bang" sound reached enough loudness (assuming the loudness, the test results are sometimes inaccurate), with a phase meter detector to check each speaker can describe differences with the speaker instructions or phase. Detection of the best off the other speakers, to prevent interference, one by one more accurate detection. Professional audio。 If there is not normal, check whether the speaker cable can be connected to the system or whether the connection can be reversed. Turn or change after detection.
5. phase adjustment: the assumption that while the use of ultra low frequency and frequency combination, because frequency system and cause the fixed position, there may be cross frequency interference or delay time caused by the different phase, so the demand for suspension phase adjustment. The pink noise (PINKNOISE) generator receives the mixer input channel, adjusts the level to the normal position, the phase meter test microphone is placed in the middle of the field, and the sound box is in the position of the regular triangle. Push the fader console output, check the screen in the whole frequency spectrum analyzer and subwoofer frequency near the band did not show the valley point. Professional audio。 If so, the corresponding frequency band of the equalizer, assuming that the upgrade is not up, there is a phase problem. The phase problem will directly affect the sound quality, but also with the equalizer is nothing more than disposal. In order to deal with the phase problem, it is necessary to adjust the phase angle of the divider or the delay time between the speakers. Adjustment, pay attention to see the spectrum show low frequency divider first conditioning phase angle, to see if there is no improvement, assumptions have improved, definitely a best numerical conditioning after the delay time, the delay time adjustment depends on the site, assuming subwoofer distance at near, delay conditioning demand on bass, also look at the screen to adjust the delay time of the spectrum analyzer, as a flat curve. Minimize phase interference.
6 .frequency equalization: after the completion of the conditioning, the frequency response curve. Take a position to test the microphone spectrum analyzer on the seating area, playing the pink noise, watching the spectrum appear, the defect center, application of modified equalizer. Then the test receiver at different places, in turn adjusting balance, change position, repeated adjustment and balance the frequency response curve in each region are as straight as possible, even if the roughly tuned equalizer. Professional audio。
7. dynamic control equipment: general dynamic conditioning conditioning equipment is pressure limiter, pressure limiter is connected in series between the chain hypothesis in the system, ordinary as maintenance system used, so is the main limiting function of the application of pressure limiter. I set this common limiter operation: the pressure limit device is set to pass through (BYPASS), input and output gain is set to 0 dB, the compression ratio is set to "large amount", and then send the mixer with pink noise, gradually push, observe the input level power indicator light, when the clipping indicator (CLIP) after the light. Access voltage limiter, adjust the start level knob, so that the power amplifier input cut off. Then the mixer output to enhance the 6 dB or let the output level indicator light + + 6 dB, then adjust the starting level, so that the power amplifier has just started flashing lights.

Enping City Keith Electroacoustic Equipment Factory

Enping City Keith Electroacoustic Equipment Factory

Enping City Keith Electroacoustic Equipment Factory

Enping City Keith Electroacoustic Equipment Factory Enping City Keith Electroacoustic Equipment Factory Enping City Keith Electroacoustic Equipment Factory Enping City Keith Electroacoustic Equipment Factory