Introducing some of the more famous songs: the drum sound in the intro of the Eagles’ Hotel California is used to identify the bass, Tsai Chin’s Ferry and other songs are used to identify the alto, and Vitas’ Opera 2 is used to identify the high notes. , as well as the Radsky March, The Girl with Eight Eyes from Osaka Castle is a good sound source for stereo positioning, as well as double bass, violin music, Ruiqiang's songs known as the male subwoofer area, and Shen Dan's songs are all listened to A good subject for music.

The difference between good and bad speakers mainly depends on the expressiveness of the low, medium and high frequencies of the test speakers, as well as the sound positioning of the stereo sound of the player. It is best to use audition discs. Each audition disc contains more than a dozen pieces of music and songs, which can comprehensively compare the quality of the sound. For example, the more famous HiVi audition discs, test machine No. 1 to test machine No. 4, etc. .

In audio technology, it includes three aspects: volume, pitch and timbre. The volume of the sound (volume), that is, the intensity and amplitude of the audio; the pitch of the sound, also known as pitch (pitch), is the frequency of the audio or the number of changes per second; the timbre of the sound (timbre), which is the overtone or harmonic of the audio wave components.

To talk about the sound quality of a certain speaker, it is mainly to measure whether the above three aspects of the sound have reached a certain level, that is, whether the pitch has a certain intensity relative to a certain frequency or frequency band, and whether it is within the required range. Within the frequency range and at the same volume, whether the amplitude of each frequency point is uniform, balanced, and full, whether the frequency response curve is straight, and whether the pitch of the sound is accurate. It not only faithfully presents the original appearance of the sound source frequency or components, but also the frequency distortion and The phase shift meets the requirements again.