There are two different types of audio signal lines in terms of the nature of the transmission signal.
The first is called the interconnect universal type, you can use it to connect a variety of devices.
The signal energy transmitted by interconnecting universal cables is very weak. These signals do not require much energy during transmission, and simple cables can be used to transmit signals from the signal source well. For example, the process from a CD player to a power amplifier can use interconnecting universal signal lines. The equipment uses a small amount of energy to achieve signal transmission. The internal current of interconnecting general-purpose signal lines is extremely weak, generally only a few milliamps.
The second is called the power amplifier type, this type of signal line is used to connect the power amplifier.
The power amplifier type signal line is the opposite, in the cable to bear a large energy signal transmission task. Because all the energy transmitted in this type of signal line will eventually reach the speaker. Therefore, it is usually connected between the power amplifier and the speaker. The speaker we are talking about here is not a CD player, nor a device of more than ten watts, but a device of hundreds or even thousands of watts used in home theaters. Since the signal energy it transmits is quite large, the current inside it is also very amazing, which may reach 10 amperes or more.
