PHASE (positive, negative) in audio means phase. Multiple speakers must emit sound in the same phase so as not to cancel each other out. Changes in the stereo phase will also affect the positioning and quality of the sound. For example, when two speaker diaphragms vibrate in a waveform, they move forward at the same time, which means they are in the same phase, one in front of the other and one behind. (Positive and negative connections are reversed) is the reverse phase. At this time, the sound is offset and the volume is smaller.

Analysis on the correct connection of PHASE (positive and negative) in speakers:

The - on the speakers is the phase of the audio. In the audio system, the phase connections of all speakers are best to be consistent. . Because the connection method of different phases affects the listening.

Although it will ring when connected forward and reverse, it will not damage the equipment. Audio is an AC signal. Different phase connection methods will cause the audio phase to shift by 180°. For example, speaker A is connected to - to -, speaker B is connected to -, -. When the two speakers play music, there will be a difference of 180 degrees. °, that is, when the drum beat of this speaker is rushing outward, the drum beat of that speaker has not yet started (the time interval here is very short, and it is basically inaudible to the human ear. It can be clearly seen with an oscilloscope)

The speaker is the terminal of the entire sound system. Its function is to convert audio electrical energy into corresponding sound energy and radiate it into the space. It is an extremely important part of the sound system, because it is responsible for the key task of converting electrical signals into acoustic signals for human ears to listen directly. It has to directly deal with human hearing, and human hearing is very sensitive. And it has a strong ability to distinguish the timbre of complex sounds. Since the human ear's subjective perception of sound is the most important criterion for evaluating the sound quality of a sound system, it can be considered that the performance of the sound plays a key role in the playback quality of a sound system.

Audio generally includes power amplifiers, peripheral equipment (including compressors, effects, equalizers, VCDs, DVDs, etc.), speakers (speakers, speakers), mixers, microphones, display equipment, etc. added together set. Among them, speakers are sound output devices, speakers, subwoofers, etc. A speaker box includes three types of speakers: high, low and medium. Three but not necessarily three.

The development history of technology can be divided into four stages: electron tubes, transistors, integrated circuits, and field effect transistors.