The high-quality multi-channel system, the real sound image in the center, and the sky channel effectively restore the sound source and reflected sound in three-dimensional space. The actual effect is not comparable to a stereo system. Although the stereo system can achieve the sound image close to the real sound image through recording and speaker placement, the problems such as sound image drift, sound image positioning changes, and sound image focus caused by human head dynamic factors are the inherent defects of the stereo speaker system. Or it is difficult to make up. The center speaker can effectively and better restore the human voice and image, with accurate positioning and no drift in sound.
1. High cost of sound source production. Complex multi-channel transmission means more data volume. Usually the data is larger than stereo music, which also requires high data transmission for music production. This also indirectly leads to a handful of multi-channel music sources. Of course, there are some relatively efficient multi-channel audio coding formats, but their respective ecology has further led to their failure to popularize.
2. The cost of the playback system is high. If you ensure that each channel has the same sound quality as the stereo, it means that you need speakers and amplifiers that are several times the cost. Many enthusiasts think that the sound quality of a home theater system in a multi-channel system is not as good as HiFi. In many cases, it is because you use two sets of HiFi speaker systems at the same price to compare with a home theater system. In layman's terms, if you compare a pair of HiFi speakers with a pair of $1,000 and a set of multi-channel speakers with a set of $10,000 to 10,000, I think you will not have the idea that the sound quality of a multi-channel system is not HiFi. More vividly, if you spend a few thousand to buy a JBS home theater, you may feel that the sound quality is not as good as the JBL 4367 that you also spent a few thousand to buy. But if you use 7 4367s to make a set of 7 in 7.2.4 of the home theater (not considering other factors such as power amplifier sound source), then you will not think that the sound quality of these 7 4367s is not as good as your original two 4367s, because they All 4367 are exactly the same. . . But the price is that you have to spend 3.5 times the price (I have prepared lines for Kong Jing, 4367 does not sell a single one!). . .
3. Larger space requirements. The placement of multiple speakers may have greater requirements for the room size. A small room may also have a pair of HiFi speakers, but a 7.2.4 may be too stretched. In short, multi-channel music and its playback system cannot be popularized not because of poor performance, but because it is expensive. Expensive things are always unpopular. . .