In recent years, with the development of digital audio technology, the requirements of the speaker is more demanding. In order to meet the requirements of technological development, to meet the needs of consumers, the world famous speaker companies are committed to improving the performance of existing speakers, and research and development of new materials for speakers, new technology and the use of new design methods.

Now the world famous big company speaker and its system technology status, characteristics and unique new technology introduced as follows:

First, the status of foreign speakers and speakers technology

Professional speaker

Mainly refers to the use of movies, stage, hall, sports venues and other occasions, speakers and speakers box. In recent years, with the new materials, new technologies, new structure, the development of new technology, stereo technology, digital technology applications, CD and VCD popular, professional speakers and its system has also made great progress, new products continue to emerge The The United States JBL, EV, BOSE company; the United Kingdom KEF, TONNY company; Japan Matsushita, Pioneer, Mitsubishi, TOA, YAHAMA company, in recent years have launched a variety of professional speakers and speaker system. Their distinctive features are, to withstand power, are more than 200W; high efficiency, generally in the 98-100dB; wide point of view. In order to achieve the above characteristics, the world famous speaker manufacturers Eight Immortals, the supernatural powers.

The main methods taken are the following:

First, the use of new magnetic materials, the use of new magnetic circuit design method. Such as the SFG magnetic circuit design used by JBL, which includes magnetic flux balance, reducing the drive source inductance and heat conduction of the new structure settings. The magnetic energy used in the magnetic material accumulated more than 3.6MGsOe. This allows the speaker to withstand the power of the capacity increases, the reproduction bass strong, there is strength.

Second, the use of new materials, such as tweeter diaphragm using aerospace titanium, because the titanium metal E · P partner material is superior, suitable for the manufacture of high-quality treble diaphragm. The use of titanium diaphragm tweeter, high frequency has been a larger extension, power capacity has greatly improved. The subwoofer uses a laminated high density composite cone. Voice coil with flat wire, due to flat line duty factor, magnetic circuit gap utilization is high, can get a higher sensitivity. The technology invented by the JBL company, other major companies have followed suit.

Third, the use of new horns, in the professional sound reinforcement in the long-term use of the index horn speaker has been replaced by a new type of directional cylinder. The key technique of the directional horn is that the horn uses a different shape of the sidewall, because the past simple linear, exponential into a complex, non-continuous functional formula to achieve a constant directivity.

Fourth, the extensive use of computer CAD, CAM and CAT technology, the use of modern technology to tap the potential of traditional speakers, professional speaker products excellence. Representative products, such as JBL's professional speaker speaker series, SR professional speaker speaker series.

2. AV speaker speakers

Mainly refers to the speaker for the family of high-fidelity sound system, karaoke karaoke, dance halls and home theater sound system speaker speakers. AV speakers have made great progress in recent years, new products continue to emerge. The world's major speaker companies have introduced various forms of AV speaker speakers. They not only have advanced technical performance, but also from the practical modeling, improve the sensitivity, expand the dynamic range, broaden the playback frequency band and good transient response and other technical features.

Common two-way speaker speakers: with an 8-inch rain or 6.5-inch subwoofer with dome tweeter. As a low-frequency public speaker, it requires the speaker unit has a wide range of vibration of the piston without vibration, in order to ensure the desired directivity and phase characteristics. Companies rely on enthusiasts to pursue the requirements of bass, and have developed dumbbell speaker speakers, with two 8-inch or 6.5-inch subwoofer folder between a dome tweeter unit, designed to strengthen the bass. Three-way speaker speakers: in the two-way frequency on the basis of an increase of a midrange unit, the advantage is to make full use of the unit's piston vibration frequency band, reduce distortion, improve power bearing capacity.

AV speaker is another significant feature is a good leak-proof magnetic properties, magnetic circuit must have a magnetic shielding design to ensure that does not affect the video image. Today, the popular multi-dimensional stereo and home theater system refers to the theater's audio-visual effects in the general family show, surround sound is part of, and is a very important part.

Now the popular surround sound on the market is roughly divided into two kinds, one is from the early "four-channel" evolution to Dolby directional logic surround sound; the other is the earliest developed by the YAHAMA DSP surround sound. DSP surround sound is to use digital processing technology to simulate the different space sound effects. This requires the front, center, rear indicator speaker sound to balance, pointing to the ideal. Electro-acoustic engineers to improve the performance of AV speakers to make unremitting efforts, through the system design, experimentation and simulation and other means to continue to explore the mysteries of the AV speaker world, to ensure the sense of hearing on the basis of ensuring the objective parameters of the speaker Occupy an important and necessary position.

Representative products, such as JBL's home theater speaker speaker system, including the front main channel, center channel, surround channel and subwoofer a total of 7 speakers. Front main channel with two 200mm woofer, two 127mm midrange unit, a titanium ball dome unit and trumpet tweeter. Use the horn tweeter when using the movie mode. Movie mode using horn tweeter, enjoy the music when using titanium diaphragm dome. Playback sound quality design is very comprehensive, the use of multi-channel sound equalizer and 7-channel sound quality equalizer, the use of digital technology in the smaller family space to create a magnificent theater sound.

3. Subwoofer

In the past, in order to achieve true bass output, designers use large pots as much as possible. Such as KLIPSCH company 27-inch subwoofer; EV company developed 30-inch cone-shaped subwoofer, and so on. In recent years, the prosperity of the home theater audio market has driven the research and development of large-amplitude subwoofer. Representative products are: AURASOUND company radial neodymium magnetic system 18-inch subwoofer.

By controlling the thickness of the top plate and using a 0.5 inch voice coil in a 2 inch long magnetic gap, a larger linear motion range is obtained.

PINEER's subwoofer has a unique initiative, from the outside, people may think that it is not hanging, in fact, it will be similar to the structure of the suspension after the film in the diaphragm, so that the diaphragm can be in the cylindrical frame Longer piston movement. This subwoofer's pot can be moved up to 50px, 6-inch woofer, up to 100dB sound pressure level at 50Hz, which is difficult to achieve with traditional woofers. Representative products such as KEF's AV1 active active subwoofer.