It's good if you can use the channel-by-channel amplification circuit when connecting speakers. But most often this is not possible, and in nine out of ten cases during the installation of an audio system, there is a need to connect, for example, four speakers to a two-channel device or eight to a four-channel device. Actually, there is nothing wrong with that. You just need to use one of the well-known speaker connection schemes, for example, the parallel connection method.
Instructions
Step 1
Connect the wire from the positive output of the amplifier to the positive outputs of speaker A and B. First connect the output of the amplifier to the positive terminal of speaker A, then run the wire to speaker B.
Step 2
Connect the negative output wire of the amplifier to the negative output terminals of speakers A and B. Follow the example of connecting the positive output terminals. The same can be done with more speakers.
Step 3
In this case, a serial-parallel connection will be used, in which you must first connect the positive and negative outputs of the speaker connectors to each other, and then, according to the above diagram, connect the terminals of the last speaker to the output connectors of the amplifier.
Step 4
Calculate the equivalent load impedance of the amplifier channel when connected in parallel. Formula to calculate: Zt = (Za x Zb) / (Za + Zb), where Za and Zb are speaker impedances. The Zt value will be the equivalent load resistance. With proper connection and calculation, you will be able to increase the speaker power. The fact is that due to the parallel connection, the load resistance decreases in direct proportion to the number of speakers connected. The output power will increase accordingly. The number of loudspeakers is limited by the amplifier's ability to operate at light loads and the power limits of the loudspeakers themselves, which are connected in parallel. Almost always, amplifiers can cope with a load of 2 ohms, less often - 1 ohm. It is very rare to find amplifiers operating at 0.5 ohms. In modern loudspeakers, the spread of power parameters can range from ten to several hundred watts.
