Features and advantages: The connection between the power amplifier and the horn speaker is achieved by the impedance balance between the output and the input, and the power balance is used to achieve unity. , The output power is unified, so there is no energy loss and frequency distortion caused by adding other conversion equipment.
Disadvantages: The calculation and wiring are complicated, and the energy loss is large when it is used for long-distance feeding.
2. Constant pressure input method
Features and advantages: The power amplifier and the speaker horn are connected through a line-to-line transformer, the power calculation of the speaker can be directly added, and all loads are connected to the power amplifier in parallel. The connection calculation is convenient, it can be fed over a long distance, and the energy loss is relatively small.
Disadvantage: Because the addition of the line-to-line transformer will increase a certain amount of energy loss.
