When we buy a home theater, the speakers are essential equipment. When choosing a speaker, the salesperson will ask me if I need a passive speaker or an active speaker. So what are passive speakers and active speakers? What is the difference between these two speakers? Today, the author will come to introduce you to what are passive and active speakers, and to analyze the difference between the two speakers.
What is a passive speaker?
Passive speakers are also known as "passive speakers." That is the speaker we usually see. There is no power amplifier circuit inside the speaker, and an external power amplifier is required. Passive speakers do not have amplifiers, but often have a crossover network and impedance compensation circuits. At the same time, we can also regard it as "wooden box + speaker", so the advantage is that the sound can reach the best state, and will not be disturbed by the external environment. Since the sound card of the playback device does not have a power amplifier and only outputs a sound analog signal, a dedicated power amplifier is required when using the speaker.
What is an active speaker?
The active speaker has a built-in power amplifier circuit that can be operated by turning on the power and signal input. There is a set of circuits inside the active finger, which has the function of power amplification. For example, most of the speakers used on computers are active speakers, that is, they can be directly connected to the sound card of the computer. There is no need to pass a dedicated power amplifier. Such speakers are usually labeled with parameters such as the output power of the built-in amplifier, input impedance, and input signal level.
The difference between passive speakers and active speakers
The difference one: in terms of power amplification (the difference between passive speakers and active speakers)
Passive speakers do not have a built-in power amplifier circuit and must be connected to an external power amplifier to operate. The active speaker is externally connected with a power supply built-in power amplifier circuit, which has sufficient power, can be operated by turning on the power and signal input, and does not need a power square amplifier.
Difference 2: in terms of output sound effects
The integrated sound card has nothing to talk about on the output for the average user. The integrated sound card mainly relies on the software debugging of the driver to output the sound effect, and the independent sound card is required to purchase the special sound effect, or the higher end. With hardware level debugging capabilities. Therefore, the integrated sound card can also meet the requirements of most users. If you don't have special requirements, don't buy an independent sound card and waste money.
Difference three: in terms of box sound
The middle and low-end speakers have box sounds. If you put out the good speakers, you can't feel the speakers. Passive speakers have more or less sound-absorbing cotton. The active speakers are not cost-sensitive, or very few. Another reason is that the sound-absorbing cotton is put more, and the power components in the box are dissipated as a problem. In addition, there is an amplifying circuit in the speaker, so the volume of the left and right speakers will be different, and the sound will be different.
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