2. The working principle and multimedia function of1audio

2: 1 The sound system consists of a woofer (commonly known as a subwoofer) and a pair of full-range speakers (commonly known as satellite speakers). In this paper, the working principle and multimedia function of 2: 1 sound will be discussed in depth to help readers better understand the sound.

Subwoofer power amplifier circuit

2. 1 speaker has two independent power amplifier circuits, one is responsible for stereo sound of the left and right passive speakers, and the other is responsible for subwoofer. The general 2. 1 audio amplifier circuits are all in the subwoofer, which is what you said.

Working principle of subwoofer

The subwoofer separates the low frequency part of the audio signal through the frequency divider (two relatively small speakers are responsible for the medium and high tones), and then drives the speakers after being amplified by the power amplifier circuit. The diameter of the horn of the bass unit determines the bass effect, so the bass speaker is bigger than the high pitch, and then there is the rich bass effect you can hear with the sound of the subwoofer box.

Multimedia capability

The multimedia function you are talking about is to add a USB interface to your subwoofer box, which makes it easier to play music directly on mobile phones or USB flash drives without going through a computer.

Explanation of connection port

Let me explain to you that the four connectors should be two red and two black. The connection mode is that the left speaker is connected with one red and one black, and the upper red and lower black are connected with one group. The other one, red and black, is a set of speakers connected to the right, and only four of them are used.