The speaker with amplifier is a passive speaker, no power supply, directly driven by the amplifier. This speaker is mainly a combination of HIFI speakers and home theater speakers. This speaker is characterized by the overall functionality, good sound quality, and can be paired with different amplifiers to obtain different sound styles.
Passive speaker: There is no internal power amplifier circuit, the need for external power amplifier to work. For example, headphones are also with amplifiers, but because the output power is very small, it can be integrated into a very small volume.
Active Speaker: Built-in power amplifier circuit, turn on the power and signal input can work.
No amplifier speakers belong to active speakers, with power and amplifier, but the amplifier for their own speakers. An active speaker means that there is a set of circuits with power amplifiers inside the speaker. For example, the N.1 speakers used on computers, most of them are source speakers. Directly connected to the computer’s sound card, you can use, without the need for a special amplifier. Disadvantages, the sound quality is limited by the sound signal source, and its power is also small, limited to home and personal use. Of course, the circuit inside may cause some resonance, electromagnetic interference and the like.

FX series active version with amplifier board

4 channels big power amplifier