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The difference between passive speakers and active speakers

Release time: 2021-06-20    Viewers: 79

Passive speakers are also called "passive speakers". Passive speakers are ordinary speakers that we usually use without power amplifier circuit inside. Although passive speakers do not have amplifiers, they often have crossover networks and impedance compensation circuits. Active speakers are usually marked with parameters such as the output power, input impedance, and input signal level of the built-in amplifier.

Passive speakers can be regarded as "wood box plus speakers". The advantage of this is that the sound can reach the best state without interference. Since VCD, DVD, and computer sound cards do not have power amplifiers and only output sound analog signals, a dedicated power amplifier (power amplifier) needs to be connected. It is often used in large-scale sound reinforcement, such as larger venues, conference rooms, movies, theaters and home theaters, etc. It needs greater power to promote, and the sound quality is good.

In the past, active was an amateur, passive is professional, but now some special professional speakers also use active. Its main features are:

1. The rated output power is large, and the power amplifier can be matched freely.


The difference between passive speakers and active speakers


2. The choice of space is relatively large, you can choose a power amplifier with discrete components, or it can be matched with a tube power amplifier.

3. There is no power amplifier circuit inside the speaker, and an external power amplifier is required to work.

the difference

Active speaker: Built-in power amplifier circuit, it can work when power supply and signal input are connected.


The difference between passive speakers and active speakers


Passive speakers: There is no power amplifier circuit inside, and an external power amplifier is required to work. For example, headphones are also equipped with a power amplifier, but because the output power is small, they can be integrated into a small volume.

Active speakers means that there is a set of circuits with power amplifiers inside the speakers. For example, most of the N.1 speakers used on computers are active speakers. It can be used directly by connecting it to the sound card of the computer, without the need for a special power amplifier. Disadvantages, the sound quality is limited by the sound signal source, and its power is also small, which is limited to home and personal use. Of course, the circuit inside may cause some resonance, electromagnetic interference and the like.
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