Weak current College】 【sound engineering analysis of common problems.

1. signal distribution problems: there are several sound farm group speakers, often use an equalizer will signal to multiple amplifier driving speakers-but also may be a different brand model of amplifier and speaker mixed use, so that it distribute the signal, the impedance mismatch, a reasonable balance between the level distribution is, the set of speakers that power is normal, as well as a balance is difficult to adjust the sound field and sound frequency characteristics.
2. graphic equalizer frequency adjustment issues: common with swallow-peaks-wave three spectral wave-shaped, above waveform is a tuner to imagine graphics, in fact, is not a sound field of the real needs of the wave, we know the ideal sound field frequency characteristic curve should be relatively flat, if human imagination to adjust the sound field frequency characteristic curve, we can imagine the result is counterproductive.
3. press for adjustment: common device only display does not function and role of excessive counterproductive. the former can be used, the latter will have serious impact sound system for dynamic, performance-sound won't come out, clearly illustrated is stronger the vocal accompaniment sound naturally weakened the singer was at a loss.
4. sound system-level problems: first, the power amplifier sensitivity control switch open enough, then the system does not do zero-level adjustments. sometimes a mixer channel push a little bit of output is very large, this can affect the system's dynamic and distortion.
5. bass signal processing: first do electronic crossover with full spectrum signal directly to the power amplifier driving speakers; the second did not know from where to extract the bass signal systems do not handle the. If e-n full-spectrum signal directly to the power amplifier driven speaker while the speaker sound wouldn't burn unit, but its low unit from full-frequency sound you can imagine; but if the system does not obtain the proper location to signal will also be on-the-spot control unnecessary trouble.
6, effects loop processing: should take the faders of the signal, to avoid the effect is not managed by microphone screech, returns conditional uses one channel, so that debugging is generally more convenient.
7, line connection process: common system AC interference loud is line connection technology and grounding did not do well, there is a balance transfer system is not balanced and unbalanced go balance of must follow standard connections-in addition to not use poor quality connectors.
8, control problems: sound mixer is a sound system of control centre, sometimes a mixer on high and low EQ equalization do equally substantial upgrading or attenuation then the system is not good, need to debug the system, not to be unduly adjust the EQ sound mixer.
Not all of the above points is a very complex problem, as long as we are in the process of installing debug, I would like to draw attention to could avoid some mistakes, making our audio engineering to achieve the desired results.