The power amplifier of the public address system is 40W, and it needs to be connected to 2, and ther

Is there 4 interfaces that refer to the amplifier? If so, according to what you give (100V output, common ground terminal, 4-16 ohm output), it means that the power amplifier has a constant voltage 100V output, and there is also a horn 4-16 ohm output, which depends on whether the speaker you want to connect has a transformer, with a transformer and is a 100V input, it is connected to the power amplifier constant voltage 100V output terminal, and the 2 speakers need to be connected in parallel; If the horn does not have a transformer, it will be connected to the 4-16 ohm output of the power amplifier, but the wire must ensure the cross-sectional area, that is, it must be thick enough.

If you want to use an interline transformer, use a general 15W interline transformer, and the output can be connected according to the impedance of the horn when the corresponding input voltage is connected. (The two horns can be connected in series or in series, depending on the impedance).

It is connected to 100V constant voltage output. As long as the speaker power is not greater than the power of the amplifier, it will be fine.

The woofer is more turbulent and must be more than twenty-five watts.

The power of the speaker is not greater than the power of the amplifier: the output of the 4-16 ohms of the power amplifier is connected.