AV功放泛指多声道功率放大器。但多声道功放必需支持多的输入或多声道的解码输出才能叫AV功放。即最基本 也要支持杜比AC-3功放和DTS输出，这才能叫现代家庭影院播放系统组成部分中的AV功放。大部分中低价AV功放也带有杜比AC-3解码和DTS解码，也就是俗称的双解码。当然还有更高级的THX功放等。
AV power amplifier generally refers to multichannel power amplifier. But multichannel power amplifier must support multiple input or multi-channel decoding output to be called AV power amplifier. That is to say, the most basic support Dolby AC-3 power amplifier and DTS output, which can be called the AV power amplifier in the modern home theater playing system. Most AV power amplifiers have Dolby AC-3 decoding and DTS decoding, also known as dual decoding. Of course, there are more advanced thx power amplifiers.
音箱系统
speaker system
家庭影院播放系统的最后一个组成部分为音箱系统。也是播放系统中所占价格比例最大的一部分。在20000元以下，音视频播放机/AV功放/音箱系统可以按1/1/2的价格下去选购，而因为AV功放在系统中起着承前启后的重要作用，在某些时候我们可以按1/1.5/2的价格选购。最基本的音箱系统为5.1声道，一对主音箱左右声道、一对环绕音箱左右声道、和 一只中置音箱聚氨酯软管 PVC软管 隔离墩模具 u型槽模具 护坡模具 pvc输送带 尼龙输送带 天津除甲醛 北京除甲醛 组成，另有发烧级家庭影院7.1声道，多增加一对侧环绕音箱，效果更佳。
The last component of home theater broadcasting system is speaker system. It is also the largest part of the price in the playback system. Under 20000 yuan, audio and video player / AV power amplifier / speaker system can be purchased at 1 / 1 / 2 price. Because AV power amplifier plays an important role in the system, we can buy it at 1 / 1.5/2 price in some cases. The most basic speaker system is 5.1 channel, which consists of a pair of left and right channels of the main speaker, a pair of left and right channels of surround speakers, and a central speaker. In addition, there is a 7.1 channel of fever grade home theater. An additional pair of side surround speakers will be more effective.