Why do speakers in professional audio use bi-amp drivers?Large conference room speakers

　　In the field of professional sound reinforcement, the traditional speaker driving methods are the built-in crossover mode driven by a single power amplifier, which is only suitable for general applications. In modern sound reinforcement systems with high requirements and high power, bi-power amplifiers (bass power amplifiers and mid-high frequency power amplifiers) or three-power amplifier drivers (high, medium and bass speakers are driven respectively) are often used. Compared with the single-power amplifier driver, this matching method can avoid many shortcomings of the single-power amplifier driver, making the sound quality more pleasing to the ear.

　　The damping coefficient reflects the ratio of the speaker impedance to the total impedance of the entire front-of-speaker circuit. The higher the damping coefficient, the more obvious the response of the output signal of the power amplifier to the speaker, that is to say, the higher the control power of the power amplifier on the speaker . The frequency division components used in the built-in frequency divider are all high-impedance components, so the power frequency division will greatly increase the total impedance of the circuit, thereby reducing the control power of the power amplifier and affecting the improvement of sound quality.

　　After using bi-amp or tri-amp drive, there is no built-in frequency divider circuit, so there is no adverse effect on the damping coefficient of the system.

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The matching principle of power amplifier and audio equipment