[Home Theater Network HDAV.com.cn] What is the echo wall speaker (sound bar)
Sound bar is the Chinese translation abbreviation of English soundbar, also known as whispering wall and other terms. Its definition is that the bar-type multi-functional integrated playback device is mainly used for matching ultra-thin video devices such as LCD TVs. Here again, the origin of the echo wall, the wall in Beijing Tiantan Huangyuyu is called the echo wall, the wall is made of bricks, the arc of the wall is very regular, the wall is extremely smooth and tidy, the sound waves The reflection is also very regular. As long as two people stand behind the east and west, and stand against the wall, one person speaks to the north by the wall, and the sound waves will continue to refract along the wall and pass to the other end of the first and second hundred meters, no matter how small the voice is. It can also make the other party hear clearly, and the sound is long and interesting, which creates a mysterious atmosphere of "human beings". So it is called the "echo wall." The sound bar also has a similar function. The unique dual cavity design ensures good isolation and separation. It also reduces the sense of direction of the bass, enhances the bass atmosphere, and reduces the airflow generated by the powerful transient response. More pure and clear, the bass fills the entire space, so it is also called the echo wall by the peers. (For more information on the whispering wall speaker, please see "The soundbar (sound bar, echo wall) full-scale analysis of home theater speakers" http://)
Echo wall features
The whispering wall is mainly used with ultra-thin video such as LCD TV, PC equipment to improve audio and improve fidelity. The power amplifier adopts imported IC bridge, the output power is strong, the low frequency dive deep, the unique double cavity design ensures good isolation and separation, and also reduces the sense of direction of the bass, enhances the sense of bass, and reduces the transient response of the powerful. The resulting airflow sound makes the sound quality more pure and clear, allowing the bass to fill the entire space. 2.1CH sound path, high, medium and low three-way crossover speaker unit. The overall speaker does not interfere with the pronunciation unit under the effect of the on-site environment. With the perfect cabinet ratio, the standing wave noise is avoided in the box body, the treble is clear, the midrange is bright, the bass is full and powerful.
To put it another way, traditional speakers are generally divided into active speakers and passive speakers. Active speakers are said to have a set of circuits inside the speakers, which have the function of amplifiers, such as speakers used on computers, most of which are active speakers. In other words, it can be used directly on the sound card of the computer, without the need for a dedicated amplifier. Passive speakers are speakers that do not have a built-in power amplifier circuit and require an external power amplifier. The whispering walls are all active speakers, and passive is not called the echo wall.
After several years of development, there are many models of the whispering wall on the market, and even the top international brands have come together (I am gratified that only the consumer brands are involved, the fever brand is not seen).
At present, the whispering wall sound can't find any speakers in the market, what kind of amplifier circuit is used, what frequency divider is used, and what kind of power supply is used. Then we have to theoretically deduce the level that each box can achieve, so as not to be fooled by false advertisements.
The only information that can be found now is the shape, size, material, speaker size, number of channels supported, what input interface, and so on.
You should know that in the above information, in addition to the input interface (what interface is used in this level of products, it can be neglected), other factors have a great impact on the sound effect. Now let’s talk about the various factors. Affect the sound effect.
Echo wall speakers are either rectangular, cubic, spherical, triangular and other irregular. At present, the echo wall has not seen the sphere and the triangle, so it is not discussed; the most visible are the rectangular and irregular shapes, most of the whispering walls, the slender strip structure can basically be included in the irregular shape; the cuboid is usually used Come as a subwoofer.
Size: A speaker to get the hand, the first thing is to consider the volume, the larger the volume, the easier the bass is to dive more, of course, the volume is also worthy of the size of the speaker, not endless big. In addition to the volume, it is also necessary to consider the length, width and height of the box, and the appropriate ratio can make the sound wave rebound in the box to produce a good resonance, and the inappropriate proportion will produce an unpleasant resonance.
The larger the volume of the speaker, the easier it is for the speaker to make a good sound. The smaller the volume, the more difficult the design. Small speakers are hard to make a sound.
Unfortunately, the volume of the whispering wall is generally small and irregular in shape. For some whispering wall products, you can only use his box as a horn, and don't want to get good sound reflection from the box. Of course, small speakers also have a special case of good sound, a very famous speaker, has been held on the altar by the fans, discontinued production for many years, there are people holding a lot of banknotes waiting for purchase, imitation products have been fired to more than 7,000 prices . But don't expect such a special case to come to the Echo Wall product. After all, this product is defined as a consumer electronics product, not a fever product.
Material: The existing echo wall is made of plastic, aluminum alloy or wood.
The plastic is easy to form, can make a pleasing shape, the surface is good and beautiful, easy to mass production, low cost and high yield. However, when the plastic is made into a box, it is easy to generate harmonics that are not good. If you drive too loudly, or the bass effect is too strong, it will produce ugly resonance, which is why there are so many subwoofers on the market. So I don't know if the manufacturer is really generous.
The surface treatment of aluminum alloy looks very fashionable and very high-grade. Nowadays, many fashion electronic products are made of aluminum alloy, and the color matching is also very good. But the aluminum alloy is not so friendly to the sound, the texture is hard, all the sound waves will bounce back untouched, although the sound-absorbing cotton can absorb the part, but it is not enough. The current echo wall basically uses a switching power supply. The sound quality is inherently hard. It can't be improved in the aluminum speaker, but it amplifies the weakness of the digital sound.
Wood is the best material for making speakers. The texture is soft and hard, it can absorb the excess harmonics and bounce out the good harmonics. However, the wood can't make a beautiful shape, the shape is more traditional, and the appearance process is single, so it is not pleasing on the outside.
Speaker size: The speaker size affects the frequency response range, which is commonly known as treble, midrange, and bass. The speaker size is usually expressed in inches and 1 inch is equal to 25.4 millimeters (mm). Many manufacturers are not willing to post the size information of the speakers, or use mm to indicate, rather than in inches, which is tricky to think about it.
Why should we emphasize the bass? Because in the current technical level, the middle and high notes are easy to do with the bass, and the speaker is more difficult to do the bass. It is the bottleneck indicator of the overall performance of the speaker, for the volume, shape and size. There are strict requirements on the ratio, etc. For active speakers, the power supply, the control of the power amplifier and the woofer should be considered. Therefore, manufacturers usually like to use this indicator to advertise their products. The movie blockbuster often uses the bass to set off the atmosphere, so the bass index is also important in the home theater system.
Echo wall speaker selection
Having said so much theoretical knowledge, let's talk about how to choose. Before you start to choose, you have to figure out what you need.
Brand followers: If you are a hardcore fan of a certain brand, or feel that you have a high-end brand to have a face, then first define the brand, and then select the specific model within the brand;
More attention to beauty: the work of several high-end brands is very good, especially aluminum, the details can be done very well.
More attention to sound effects: Due to physical conditions, the difference between these high-end brands and domestic brands in sound effects is not as great as in the traditional audio field. Domestic brands are more focused on sound effects than foreign brands in terms of sound and aesthetics. They are more conservative in terms of selection and material selection, which lays the foundation for good sound quality.
More attention to cleanliness: Echo Wall This product is rooted in the pursuit of cleanliness, and hopes that only one speaker can meet the needs of sound. To implement the root cause of neatness, it is necessary to consider whether it is necessary to connect an external subwoofer to the main speaker.
Of course, the most ideal state is that the main speaker integrates the bass function, and indeed several bass effects have been used. However, there are still a lot of echo wall volumes that are too small, the speakers are too small and the bass is not enough.
This is to find the answer from your usage habits, whether you often watch movies and play games. If you are looking for an audible wall that incorporates a bass function, or with an independent subwoofer.
When using an independent subwoofer, pay attention to three problems, one is the cable pull problem; the other is that the subwoofer can't be too far away from the main box, otherwise it will make the ear hear two sources with strong sense of distance when it is actually used, so It is not natural in listening. The third is to avoid placing the subwoofer on the table or other items, preferably on the ground, because it may resonate on the table.
The difference between whispering wall and traditional home theater
Traditional home theaters need to be equipped with speakers, subwoofers, amplifiers, TV sets or projector screens, etc. Traditional 5.0 channel and above speakers have more realistic stereo surround effects, better scene effects, and the perfect integration of high, medium and low frequency bands. It creates a qualitative leap in the sense of atmosphere and space. The best sense of space positioning creates the most realistic experience of the spot, which will take you into the three-dimensional space and experience the most powerful home theater set, let you Do not leave the house, enjoy the realistic and realistic of the theater. Its shortcomings are also very annoying: the equipment occupies more space and the wiring is complicated; it requires professional installation and debugging to achieve good results.
The advantages of the whispering wall speaker: It occupies a small space, which is very suitable for the living room with small space; the operation is simple, the connection is convenient, and even the electronic white is very easy to use. The 5.1-channel audible wall sound is better for watching movies, and it has the functions of Bluetooth, USB, etc. It is more convenient to listen to music. Thanks to the proprietary AMBIsoundTM echo surround technology, five independent loudspeakers combine array sound, precise drive positioning and subjective sound processing to create a surround sound effect by integrating a single speaker. To put it bluntly, through digital audio, you will need to convert all kinds of sound effects from physical speakers into analog multi-directional positioning. Understand that it is actually a fake surround. For the average user, the effect is still satisfactory, but for professional users and enthusiasts, the sound is completely unable to achieve the effect of the real surround box! (PS 7.1 channel, it is purely speculation concept, no actual use)
(For more information on the whispering wall speaker, please see "The soundbar (sound bar, echo wall) full-scale analysis of home theater speakers" http://)
More fresh and fun home theater information, please pay attention to home theater network http:// (WeChat: cnhifi), the country's most influential home theater audio player interactive media website.
Tsv Tunnel Spraying Vehicle,Multi-Functional Washing Vehicle,Custom Tunnel Cleaning Car,Automatic Tunnel Spraying Vehicle
CRRC SHANDONG CO., LTD. , https://www.crrcsd.com