Most people may not have the ability to analyze various components of JBL sound, but there are many opportunities for speakers and power amplifiers. So what is the content related to the setting of power amplifier and speaker in JBL sound supporting system?
Power matching: Generally speaking, the power of JBL audio power amplifier is greater than that of speaker. In general, the power of the power amplifier is more than 30% higher than that of the speaker. If a small power amplifier is used to push a high-power horn, the amplifier is easy to overload and produce a current harmful to the horn. At this time, the horn unit is easy to be damaged.
Impedance matching: at present, the power amplifiers used in professional sound systems are generally constant resistance. Most general power amplifiers work at 4 Ω - 8 Ω. Some sound engineers like to push more than two speakers with one amplifier. At this time, pay attention to the speaker. If the impedance is lower than 2 Ω, it is easy to damage the power amplifier. This short-circuit working mode should not be used.
There are sometimes many switches behind JBL audio power amplifier, such as mono working mode, stereo working mode and bridge working mode; There are also level adjustment switches and signal frequency switching switches. We must pay attention to these switches when using them and adjust the power amplifier to the correct or ideal working state, otherwise unpredictable faults may be caused.
The line connection between the power amplifier and the speaker: the signal line of the power amplifier shall use the balance line as much as possible. If there are multiple power amplifiers in the system, it is better to use the signal amplification distributor to separate enough signal lines without attenuation and supply power to each signal line. Using a power amplifier alone can reduce system noise, reduce hidden dangers and improve signal-to-noise ratio. At the same time, pay attention to the quality and connection of speaker cable. Try using a thicker and shorter speaker cable. When connecting, be sure to distinguish the positive and negative poles to avoid short circuit, especially for professional four core or more horn plugs. The terminal is very small, so be careful when wiring.
In terms of technology, the following points should be paid attention to in the matching of power amplifier and speaker: power matching, power reserve matching, impedance matching, damping coefficient matching and so on. On the one hand, several speaker systems should be installed in the listening room. A simple power amplifier has only 1-2 power outputs, and a simple dual channel stereo system can be configured; Complex power amplifiers should be configured with 4-6 power outputs. The high output power of the power amplifier and the high bearing power of the speaker must be well matched to prevent the speaker from being accidentally burned.
The power configuration of power amplifier and speaker also has a certain relationship with the target loudness. Under a certain target loudness, the dynamics of the music signal should be fully guaranteed on each equipment. If the power amplifier power is too large and its gain setting is very small, the loudness has met the requirements, but at this time, the gain of the power amplifier limits the dynamic range of the signal. Therefore, the power amplifier power should not be too large; Otherwise, it will not only waste expenses, but also bring the trouble that loudness and music dynamics cannot be balanced, and the speaker is overloaded.
That's all for the setting of power amplifier and speaker in JBL audio supporting system. If you need audio equipment, please come to our website at www.wenguangzhining.com Com bar, professional production for many years, with strength.