1. Signal distribution problems: 2. The frequency adjustment problem of the graphic equalizer: 3. Pressure limiter adjustment problem: 4. System level problem: 5. Bass signal processing: 6. Effect loop processing: 7. Line connection process:
OEM is "original equipment manufacturer" which means the battery is identical to what was originally supplied with the phone. Non-OEM is a battery made by a different company that reverse-engineered the original battery and started producing functionally-equivalent copies for sale into the same application.
There is no hard and fast rule, but generally people perceive OEM to be higher quality and more reliable than non-OEM, as a result pricing will often be higher for OEM batteries. Batteries are difficult to manufacture consistently because minor variations in water content (parts per million) and minor mis-matching of the anode and cathode capacities (produced by micron thickness variations in coating processes) cause substantial cycle life reduction in the final battery. It could be the difference between getting 100 cycles out of a battery (not to hard) versus 500 (more challenging). OEM's might have a higher reject rate of marginal batteries, which leads to higher costs on the ones that do pass.
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In the case of several sets of speakers in the sound field, an equalizer is often used to distribute the signals to multiple amplifiers to drive the speakers. But at the same time, it may be that different brands of amplifiers and speakers are used together, so the distribution signal brings many problems, whether the impedance is matched, whether the level distribution is balanced, whether the power obtained by the speaker is normal, and it is difficult to adjust with a balance. The frequency characteristics of the sound field and the speaker.
There are three kinds of spectral wave patterns of swallow-type mountain-type wave type. The above waveforms are all imagined by the tuner. In fact, it is not the waveform actually needed by the sound field. We know that the ideal sound field frequency characteristic curve should be relatively flat. If one artificially adjusts the sound field frequency characteristic curve by imagination, it can be imagined that the result is counterproductive.
It is common to make the furnishings do not work at all and the effects are excessively counterproductive. The former can be used, the latter will bring serious impact on the dynamics of the system, the performance is that the sound can not be emitted, the obvious performance is that the stronger the accompaniment, the natural weakening of the voice makes the singer feel at a loss.
The first is that the power amplifier sensitivity control switch is not open enough, and the second system does not make zero level adjustment. Sometimes the mixer channel pushes a little bit of output, which can affect the dynamics and distortion of the system.
The first type does not do the electronic crossover with the full-range signal directly to the amplifier to push the speaker; the second does not know where to extract the bass signal from the system for processing. If you don't do the electronic crossover, use the full-range signal to directly push the speaker to the speaker. Although the speaker has sound and it won't burn out the unit, you can imagine the low-frequency sound of the low-frequency unit. But if you get the signal from the inappropriate position in the system. It will also bring unnecessary trouble to the on-site control.
The post signal of the fader should be taken to avoid the uncontrollable effect causing the microphone to whistle, and returning to conditionally occupy one channel, so that debugging is more convenient.
Common system AC interference sound is the result of the line connection process is not done well, and there are balance shift unbalance and unbalanced balance connection in the system must be connected according to the standard. Also don't use inferior connectors.
8. Control problem: The mixer is the control center of the system. Sometimes the high, medium and low EQ balance on the mixer is equally enhanced or attenuated, indicating that the system is not adjusted. You need to re-tune the system and do not adjust the tuning too much. Taiwan's EQ.