Disadvantages: limited by the amplifier,

Disadvantages: limited by the amplifier, sound quality is relatively poor, can not be independent of each point source selection. . Denon Home Theater-level amplifier . 3. with weak wiring box In recent years, with the real estate industry, home multimedia cabling box is widely used. configuration audio module, the wiring box there is a (multi) audio inputs and multiple audio output. It was through the wiring box of the audio interface to achieve the background music. Specifically, as : ; the DVD's audio output to connect to the audio input terminal wiring boxes, and then the audio output to connect to a different room, built-in Herve Leger mplifier audio switch, audio switch the power amplifier directly connected to ceiling speakers.
This is the background to achieve stereo Music . as DVD audio output through long distance without amplification on (usually more than 20 m) to a power amplifier (the signal is amplified through the direct transfer is a taboo Sound Design), after the signal amplification through short distance (few meters) to a speaker. there is no amplification of the signal power is small, 220V power is a strong source of interference, through the long haul after the interference signal will be superimposed, and then amplified through the amplifier, will produce a strong white noise.