[Home Theater Network HDAV.com.cn] The status of the wall speaker
In the past, most of the in-wall speakers were used in hotels, theaters, public address systems, etc. They were mainly used to play background music. In general, these in-wall speakers have a certain gap with traditional home speakers in terms of production process and performance indicators. Therefore, the performance of sound quality cannot be compared with traditional home speakers. However, as consumers have been improving the quality of interior design in the past year and more and more professional speaker manufacturers have used their own technology to join the ranks of the wall-mounted speakers, the production level and sound quality of the wall speakers are constantly Raise so that they gradually move towards the home market.
The wall-mounted speakers currently on the market are roughly divided into two types. The first type is In-Wall Speakef. This type of speaker can be installed on the front, rear, left and right walls, and the number of speakers used is also relatively large. Only above, so the volume has also increased, the price is relatively expensive, and is currently one of the most used products in the home theater system. Brands such as M&K, B&W, KEF, Atlantic Technolony (Atlanta), Snell AcOLISitcS (Poetry), JMlab Focal (Jinlang), Genelec (Trueli), Trlad have similar products. The other is the In-Ceiling Speaker, also known as the ceiling speaker. This kind of speaker is different from the former in that it is mainly installed on the ceiling, which is very suitable for playing background music in a small space such as a study room or a bedroom. In terms of the shape of the horn, the front baffle of our common ceiling horn is generally round. Since the number of horn units used is relatively small compared to the former, it is generally two units or less, so the volume is greatly reduced. The price is also cheaper than the former. The market price of these in-wall speakers is usually calculated on a single basis, and consumers can purchase the number of speakers according to their actual needs.
What are the advantages of the wall speaker?
Why are so many speaker manufacturers now launching their own wall-mounted speakers? At the same time, what are the advantages of wall-mounted speakers compared to traditional home speakers? On this issue, from the perspective of interior design In fact, the appearance of the wall-mounted speaker will cleverly install the speaker in the wall, which not only reduces the excessive use of the traditional speaker in the room, but also integrates the home audio and the interior design to make the interior layout more clean and comfortable. And beautiful, this is one of its biggest advantages. But if we technically analyze the in-wall speakers, we will find that the in-wall speakers can easily solve the problem of sound insulation that traditional home speakers need to solve with a solid wall.
Solve the sound diffraction: What is the culprit of the sound diffraction? It is the speaker box itself. Since the unit's sounding method is not only the energy in front, but also the energy that expands in all directions, the corners next to the box are likely to cause the middle and high sounds to be diffracted. When the diffraction phenomenon is severe, interference may occur, which affects the high-frequency energy sensation and reduces the sound image formation. As for how to reduce the sound diffraction, this is one of the most headaches for many speaker manufacturers, they also tried everything. The easiest way is to buy a thin piece of foam or flannel, cut into small pieces, and then attached to the tweeter to improve. The more exaggerated approach is to embed the entire speaker in the center of a large foam like WesflakeAudio (West Lake). Although this method is absolutely immediate for the improvement of sound, its visual effect is extremely poor. The most ideal method is to expand the front baffle as much as possible to reduce the sound diffraction, and the in-wall horn is to use the large wall as the front baffle to solve the problem of sound diffraction.
Solve the vibration of the box: The vibration of the box is the biggest enemy of the speaker. This is because the vibration of the box will make the speaker produce the sound and dye, which will affect the faithful restoration of the sound. How to make the cabinet more sturdy and free from vibration? The traditional method of household speakers is to use various reinforcement measures in the box. For example, the skeleton support of the wood, plus the internal partitions, etc., are all good ways to make the rigidity of the box more enhanced. Some advanced speakers use metal as the box, and hope to use the weight of the metal to suppress the vibration of the box. Brands such as YG Acoustics and Wilson Audio are representative of metal cases. For a wall-mounted speaker, the wall is equivalent to its front panel and its cabinet. Therefore, as long as the wall in your home has sufficient strength and thickness, in theory, this can easily solve the vibration problem of the "box", so that the wall speaker emits a more realistic and accurate sound.
What should I pay attention to when buying a wall speaker?
As there are many types of wall-mounted speakers on the market, there may be some doubts for the average consumer. How should I choose? What should I pay attention to when choosing? Here, we will summarize the following points for consumers who want to purchase wall speakers.
1. Frequency response (Hz): I believe this indicator is no stranger to most readers. Because it is one of the important indicators to measure the pros and cons of the speaker. In theory, the wider the frequency response of the speaker, the more sound signals can be reproduced. The sound that can be heard by the human ear ranges from 20 Hz to 20 kHz. But in fact, the current products are rarely able to achieve this indicator, especially in the lower limit of the low frequency, it is quite difficult to reproduce the low frequency of 20Hz. For a general wall-mounted speaker, the low-frequency lower limit can reach 50Hz, which is quite good, and the reproduction of the frequency below 50Hz is basically done by adding a subwoofer.
2. Sensitivity (dB): The sensitivity of the speaker is the sound pressure value measured at a specific frequency by inputting 1W (2.83V or 1V) to the speaker and then measuring the position of the positive axis of the speaker. This value is equivalent to the efficiency of the speaker. In the case of the same input power, the higher the sensitivity of the speaker, the higher the sound pressure output. In other words, the higher the sensitivity of the speaker, the less power it needs at the same sound pressure. In fact, in today's pursuit of high efficiency, the sensitivity of the speakers produced by most manufacturers is maintained at a high value. Therefore, consumers do not have to worry about the choice of amplifier.
3. Power carrying capacity (W): Now almost all manufacturers will give the power carrying capacity of the product or the recommended reference power of the recommended amplifier power. Therefore, consumers can choose the matching product based on the amplifier they use and combine this reference value. For example, the manufacturer's recommended amplifier power is 30W ~ 150W, then you can choose an amplifier with an output power of 150W to match. In fact, the actual power carrying capacity of the speaker is higher than the reference value. Even using an amplifier with a higher nominal power does not have a large impact on the speaker.
4. Movable tweeter design: At present, some tweeters of wall-mounted speakers are movable. This design can fine-tune the pointing angle of tweeters according to the actual needs of consumers to get better. Sound effects.
5. High and low bass adjustment function: This function can make appropriate fine adjustment according to the listening preferences of different consumers and the acoustic characteristics of the listening space. For example, when you listen to the pop music with strong rhythm, you can enhance the bass to get more low frequency. When you listen to the rhythm music, you can increase the high frequency. However, not all products currently available on the market have this feature. Therefore, you can choose an amplifier with high and low-pitched adjustments to achieve the same effect. More fresh and fun home theater information, please pay attention to home theater network (WeChat: cnhifi) http://, the country's most influential home theater audio player interactive media website.
Floating Board To Board Connector
FLOATING Board to Board Connector
FLOATING Board-to-board (BTB) connectors as the name indicates is used for connecting circuits board together. This kind of connectors are suitable for stacking circuits boards one over another. Flat flexible cables can be avoided using these kinds of connectors; moreover it makes the entire unit more compact. The commonly used BTB connectors are SMT connectors and Berg Strip. We will discuss about them in detail in the following section.
SMT CONNECTOR
Surface Mount Technology (SMT) connector is a commonly found board-to-board connector in advanced circuit boards. As the name indicates this connector is available only in surface mount model. It is carefully mounted on to the solder pads on the surface of the PCB.
SMT connectors are ideal candidate for miniaturization due to their small area of occupancy and stacking height. They are suitable for double layered or multilayered PCBs. They are designed for high performance and reliability.
They commonly found in advanced circuit boards in networking equipment, telephones, mobile phones, computers and other consumer electronics.
Floating Board to Board Connector
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