In Public Address, the cabling between the amplifier and the loudspeakers must comply with certain conditions or it may cause a failure or malfunction!
Connect the cable to the "COM" and "100V" terminals of the amplifier
Connect the cable to the "COM" and "20W" terminals or other power of the speaker(s)
(The 4 Ω or 8 Ω terminals are reserved for low impedance use only)
However, Rondson offers several types of amplifiers that require different wiring for each of them, namely :