That's right, it's a usb speaker, that is, the digital audio signal is directly input into the speaker from the USB port on the motherboard, and then the signal is processed and then output through the built-in D/A conversion circuit of the speaker.

The USB speaker, through the USB interface, processes audio digital signals at the PC end and drives the speaker or earphone to make sound. In 20 12, the main products on the market were integrated chips (newly created 3S 1603 1623, Hua Xun CM 108 120, etc. ).

These integrated circuits are just a sound card integrated circuit. After the USB port is plugged in, the USB speaker will automatically call the original sound card driver of the system and change it to its own (USB sound card).

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Usb speakers, also known as mini speakers, have the following functions:

1, compact, easy to carry, personalized color matching, fresh and natural. The largest is no more than a football, and the smallest is as big as an egg.

2. It integrates power amplifier, battery and dual speakers, and pioneered the patented technology "telescopic expansion resonator", which solved the problem of narrow resonator of mini speakers, broke the external specifications of speakers for decades and compressed to the limit.

3. Mini speakers can play music only by connecting with laptops, mobile phones and other devices without power supply.

Some speakers are equipped with large-capacity lithium batteries, and the products can play music for 3-5 hours. When the battery of the speaker is dead, you can connect the computer through USB port to charge the battery.