The factors that determine the quality of audio mainly include the following aspects:

1. * * Frequency response**

Frequency response refers to the frequency range that an audio system can reproduce, typically between 20Hz and 20kHz. The ideal frequency response should be flat to ensure sound balance across all frequency bands.

2. * * Distortion**

Distortion refers to the difference between the output signal and the input signal of a sound system. The lower the distortion, the closer the sound quality is to the original sound. Common types of distortion include harmonic distortion and intermodulation distortion.

3. Signal to Noise Ratio (SNR)**

The signal-to-noise ratio is the ratio of signal to noise. The higher the signal-to-noise ratio, the smaller the background noise and the clearer the sound quality.

4. * * Dynamic Range**

Dynamic range refers to the difference between the maximum and minimum signals that a sound system can handle. The larger the range, the more delicate the sound quality performance.

5. * * Transient response**

Transient response reflects the ability of sound to reproduce rapidly changing signals, and the faster the response, the more accurate the sound quality.

6. * * Sound field positioning**

Sound field positioning refers to the ability of a sound system to reproduce the location of the sound source. The more accurate the positioning, the better the stereo effect.

7. * * Speaker quality**

The material, design, and craftsmanship of speakers directly affect sound quality, and high-quality speakers can better reproduce sound details.

8. * * Amplifier quality**

The performance of amplifiers affects the power output and sound quality of audio systems, and high-quality amplifiers can provide purer signals.

9. * * Sound source quality**

The quality of the audio source (such as CD, MP3, lossless format, etc.) directly affects the sound quality, and high-quality audio sources can provide better sound details.

10. * * Listening environment**

The acoustic characteristics of the listening environment (such as room size, shape, sound-absorbing materials, etc.) can also affect sound quality, and a good acoustic environment can enhance the sound effect.

11. * * Connection line and interface quality**

High quality cables and interfaces can reduce signal loss and interference, and improve sound quality.

12. * * Tuning and Balancing**

Appropriate tuning and equalization settings can optimize the sound quality performance of the audio system.

These factors collectively determine the overall sound quality performance of the audio system.