1. Tuning method of the host + coaxial speaker: turn up the volume, test whether there is early distortion sound, balance left and right at high speed, and check whether there is a 180° phase difference.
2. Find a cassette or CD with monotonous vocals and musical instruments, put the LOUND OFF BASS button and TREMBLE button of the main unit in the middle, and test whether each speaker has the same performance on vocals. If there is a spectrum tester, test the treble and bass ratio, if not, you have to listen to it by ear.
3. Host + Amplifier + Speaker: Set the sensitivity of the amplifier, set the amplifier to the minimum, and then turn the volume of the host to 80%.
4. Increase the sensitivity of the amplifier until the speaker has a distorted sound, and then reduce it a little. This point can get the best signal-to-noise ratio. The others are the same as combination