The problem of matching the efficiency of the speaker and the output power of the amplifier is related to the design orientation of the speaker and the amplifier.
Let's talk about the reason why the design of the speaker will make a pair of speakers with high efficiency, but it is incomparable. In modern speakers, the combination of speaker units is more than two channels, and some even use the flagship combination of dozens of units. Due to the large number of units used, the design of the crossover is more complicated. In order to accommodate the operating characteristics, efficiency and correction of the phase of each unit during operation, the crossover uses a lot of capacitors, resistors and coils. These parts will consume a lot of power. Although the sensitivity and efficiency of the unit are very high, it can be propelled with very little power. However, when many units work together, the required propulsion current is large, such as the current output of the power amplifier. If it is insufficient, it will cause distortion. If the volume is forcibly increased, and the amplifier itself is not designed for overload protection, it will burn the amplifier or even burn out the speaker unit.
Enthusiasts often have a misconception that power amplifiers with large wattages must be powerful. In fact, the size of the wattage is only one of the indicators of the power amplifier. The most important thing is that the amount of current it outputs is the key. Have you seen that the portable travel audio sets with only a few kilograms on the market have a power of several hundred watts? Will you believe that a power amplifier that uses only a few large batteries is able to withstand it? As long as you think about it, a few The rice cooker with a power of one hundred watts can be used for cooking. Can you try it with a few batteries? These manufacturers even blushed when they saw the numbers. The current is sufficient, the power amplifier must have a strong power supply, and it can be achieved with a strong output stage. When the current can meet the needs of many units of the speaker, the effect of beautiful sound can be achieved. This is the modern flagship class or those high-end ones. The power amplifier has an output of only three hundred watts, and the reason for its amazing weight.
The principle of cooperation between the speaker and the power amplifier not only depends on the efficiency of the speaker, but also on its current requirements. Just looking at its efficiency and allocating power amplifiers often makes mistakes in the examples I have mentioned before.
Speaking of this, you may think, do I have a large wattage and strong current level, which can be used with any speaker in the world, which is unfavorable? You are wrong! Many people have tried to use some Large current amplifiers are used to push some high-efficiency speakers, but the effect is not as good as some fine wattage and fine current amplifiers. What is the reason? This involves the design of speaker units, especially those designed before the 70s, and Those horn speakers. At that time, the power amplifiers produced by general manufacturers were only a few watts to tens of watts. The design of the speaker unit at that time was very sensitive and efficient, and the current required was very small. Only a few watts of power amplifier can be pushed to the sky, and many manufacturers still produce such speakers today, including JBL, KLipsh, Lowther, Altec, TAD and other brands. Under the continuous improvement of these products, some can not only have high efficiency characteristics, but also can withstand a lot of power, but some products can only use low-power amplifiers to make the sound, such as Lowther products, if you use some Amplifiers with slightly higher power (for example, more than 10 watts) will completely lose their unique charm and aesthetics. Klipsh speakers are only suitable for low-wattage and beautiful-tone amplifiers to promote beautiful sound. If you use some The strong current and high wattage power amplifier pushes it, and the sound only appears hard, and the croaking completely loses its own tone and temperament.
In addition to the above phenomenon, what is more interesting is that some low-efficiency speakers use some fine-power amplifiers to push it, and they are pushed to the top. How can this be explained? In addition, some people use a 100-watt machine to go It was pushed to a power amplifier with only a few tens of watts, and even the power was lost. What is the reason? In addition, a amp with a few watts sounds like its power is less than a few tens of watts The performance of the stone machine is not much worse, what is the reason? Why is a tens of watts of power amplifier will burn out the speaker unit and a few hundred watts of power at the same volume will not burn the unit? I Believe that this is where the audiophiles are confused.
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