Audio (DVD, power amplifier, etc. ) can be placed next to the sofa for easy operation. Many people say so. But it is not good from the point of view of environmental protection and health preservation: 1, the human body is too close to the electromagnetic field. 2, the loudness of the sound exceeds 90 decibels, and the hearing organs are damaged. 3. Even if the sound doesn't work, the magnetic field of the speaker is too close to the human body, and the long-term impact on the human body can not be ignored, and people will have sub-health symptoms.