The main differences between Bluetooth audio and WiFi audio are as follows:

1. Transmission distance: Bluetooth is generally no more than 10 meters (only within the visual distance), WiFi is generally more than 50 meters (through walls).

2. Transmission speed: Bluetooth is less than 2Mbps, WiFi is generally up to 150Mbps. In terms of audio high fidelity, WiFi audio has more obvious advantages.

3. Transmission quality: Bluetooth is not stable, and WiFi transmission is stable.

4. Networking function: Bluetooth speakers cannot directly connect to the Internet, and need to be connected to a computer or mobile phone that can connect to the Internet and equipped with Bluetooth. The WiFi speaker connects to the Internet directly through the router.

5. Device matching: The Bluetooth speaker needs to search, pair, and connect when connecting with other Bluetooth devices. WiFi speakers only need to be connected to WiFi hotspots, which is more convenient than Bluetooth.

6. Content selection: Bluetooth audio cannot directly listen to online music library, radio, etc., but WiFi audio can.

Speaker refers to a device that can convert audio signals into sound. In layman's terms, it means that the main speaker cabinet or the subwoofer cabinet has its own power amplifier. After amplifying the audio signal, the speaker itself will play back the sound to make the sound louder.

The speaker is the terminal of the entire sound system, and its function is to convert audio energy into corresponding sound energy and radiate it to the space. It is an extremely important part of the sound system and is responsible for the task of converting electrical signals into acoustic signals for direct listening by human ears.