First, about the connection of the horn line. The gold wire is connected to the positive plate of the speaker, that is, the red wire clamp, and the silver wire is connected to the negative plate of the speaker, that is, the black wire clamp. If the positive and negative poles of the main and auxiliary speakers are reversed, the sound quality will be seriously deteriorated. The positive and negative poles of the main and auxiliary speakers are not reversed, the color is reversed, and the sound quality is not good. The "nerve line" may be such a nerve.
Second, the machine can improve the sound quality. Electronic products need aging, speakers including mechanical parts need running-in, and ramblers have special software for cooking machines, which can be downloaded from the Internet.
Third, the back of the speaker is more than 30 cm away from the wall, and there will be no bass turbidity. If the distance is not enough, move the table to the front.
Fourthly, the bass 0 gain of R 1900T3 is not in the middle position. After completing the above three steps, you can try to turn the bass gain counterclockwise to the end and amplify the bass by 2. 1 better.
5. Sony's earplugs in JD.COM have 3 screens, and the price on the fold is 39- 149288, which belongs to the middle and upper earplugs. I can hear the difference very well. Maybe the active speaker can't get into your ear.