Passive speakers are also called "passive speakers". Passive speakers are ordinary speakers that we usually use without power amplifier circuits. 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.
Features of passive speakers:
1. The rated output power is large, and the power amplifier can be matched freely.
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 sound quality phase, and an external power amplifier is required to work.
The difference between passive active speakers
Active speakers require external power, so they can provide high power. Passive speakers are not needed, so the volume is low. For example, headphones are passive speakers.
Active speaker means that there is a set of circuits inside the speaker, which has the function of power amplifier. For example, most of the N.1 speakers used on computers are active speakers. In other words, it can be used directly by connecting it to the sound card of the computer. There is no need to go through a special power amplifier. The disadvantage of course is that the circuit inside may cause some resonance, electromagnetic interference and the like.
Passive speakers can be regarded as "a wooden box plus a speaker". The advantage of this is that the sound can reach the best state without interference. Because VCD, DVD, and computer sound cards do not have power amplifiers, they only output sound analog signals. Need to connect a dedicated power amplifier (power amplifier).