Output sensitivity of car speakers

Most of the main units of car speakers have 1 set of RCA outputs, which can output low-voltage signals, so that they can be directly transmitted from the main unit to the external power amplifier. The main unit usually has 1-3 pairs of RCA outputs, of course, the more the better , so that the frequency division will be more detailed. The output sensitivity is actually the output voltage of the RCA: generally between 0.2V-4V. Choose a host with high voltage output, such as 6V, which will greatly help the output power of the audio system.