At present, there are more than 280 professional manufacturers of loudspeakers and speakers produced abroad (according to AUDIO data), and there are thousands of products produced. The speaker and speaker system act as the terminal for audio reproduction, and its quality will directly affect the sound quality of the entire audio system. Major companies engaged in the production of loudspeakers abroad have invested a lot of effort to continuously develop new products for speaker development to satisfy the different operating environments and the higher demands of different audio equipment. Over the years, with the development of digital audio skills, the demand for speakers has become more stringent. In order to meet the needs of skills development and satisfy the needs of consumers, the famous speaker companies all over the world are committed to improving the functions of existing speakers, and to develop new materials, new processes and new methods for the development of loudspeakers. The current status, characteristics and common new skills of the speakers and their system skills of the world's Zhiyi company are as follows:
The current status of foreign speakers and speakers
1.1 professional speaker
First and foremost, it refers to speakers and speaker boxes used in films, stage, halls, stadiums, etc. In recent years, with the development of new materials, new skills, new layouts, new processes, the use of stereo skills, digital skills, the prevalence of CDs and VCDs, professional speakers and their systems have also been greatly developed, and new products are constantly emerging. American JBL, EV, BOSE company; British KEF, TONNY company; Japan Panasonic, striker, Mitsubishi, TOA, YAHAMA company, these years have launched a total of professional speaker and speaker system. Their obvious features are that the receiving power is large, both above 200W; the efficiency is high, usually 98-100dB; the directivity is wide.
In order to complete the above characteristics, the world's famous speaker manufacturers are eight immortals across the sea. The first steps to adopt are as follows. At the top of the list, select new magnetic materials and use the new magnetic circuit depiction method. For example, the SFG magnetic circuit selected by JBL includes a new layout setting with flux balance, reduced drive source inductance and heat conduction. The magnetic data used has a magnetic energy product of 3.6 MGsOe or more. This increases the capacity of the speaker receiving power, and the playback is low and weak. Second, the use of new information, such as the tweeter diaphragm using aerospace titanium, because the titanium EP is superior to the data, suitable for the manufacture of high-quality high-pitched diaphragm. With the tweeter of the titanium diaphragm, the high frequency is greatly extended, and the power capacity is also greatly improved. The low-pitched loudspeakers are made of laminated high-density composite paper cones. The voice coil uses a flat line because the flat line has a high duty factor and the magnetic circuit has a high utilization rate, which can achieve higher sensitivity. This skill was created by JBL, and other major companies have followed suit. Thirdly, the use of the new horn, the index horn loudspeaker used for a long time in professional sound reinforcement has been replaced by a new type of directional horn. The key skill of the directional horn is that the horns use side walls of different shapes, because the simple linear and exponential types become cluttered and non-continuous functions to achieve stable directionality. Fourth, the extensive use of computer CAD, CAM and CAT skills, the use of modern skills to explore the potential of traditional speakers, so that professional speaker products are carefully crafted. Representative products, such as JBL's MR professional speaker series, SR professional speaker series.
1.2AV speaker speaker
First of all, it is a speaker speaker for the sound system of the family high-fidelity audio system, karaoke karaoke, ballroom and home theater. AV speakers have been greatly developed in recent years, and new products are constantly emerging. The world's major speaker companies have introduced various forms of AV speaker speakers. They not only have leading skill capabilities, but also feature features such as useful form factor, improved sensitivity, extended dynamic size, widened replay band and outstanding transient response. A common two-way crossover speaker: use an 8-inch rain or 6.5-inch mid-low sound unit plus a dome tweeter. Since the middle and low frequencies share a single speaker, the speaker unit is required to have a wide piston oscillation scale without exhibiting an incision oscillation to ensure the directional and phase characteristics of the ambition. According to the needs of enthusiasts seeking low-pitched sound, the company has successively developed dumbbell-type speaker speakers, and used a double-pitched tweeter between two 8-inch or 6.5-inch low-pitched units to enhance low-pitched sound. Three-way crossover speaker: Add one midrange unit on the basis of two-way crossover. The advantage is to fully utilize the piston oscillation frequency band of each unit to reduce distortion and improve power bearing ability. Another obvious feature of the AV speaker is that it has a good magnetic leakage prevention function, and the magnetic circuit must have a magnetic shielding depiction to ensure that the video picture is not affected.
Nowadays, the prevailing multi-dimensional stereo and home theater system refers to the display of the theater's audio-visual function in the ordinary family. The coiled sound is a bit more and more important. The coiling sounds that are popular in the market today are roughly divided into two types, one is the Dolby directional logic coiled by the early "four-channel" evolution; the other is the DSP coiling sound originally developed by YAHAMA. DSP coiling sound is a digital processing skill to simulate the sound effects of different spaces (such as a film theater, concert hall, etc.). This requires the front, center, and rear indicator speakers to be balanced, and the directionality is ambition.
The engineers in the electro-acoustic industry have made unremitting efforts to improve the functional goals of the AV speakers. Through systematic depiction, experimentation and imitation, they constantly explore the subtleties of the AV speaker world. On the basis of ensuring the sense of hearing, the objective parameters of the speakers are guaranteed. Take possession of important and necessary orientations. Representative products, such as JBL's home theater speaker system, including front main channel, center channel, coiled channel and ultra-low sound a total of 7 speakers. The front main channel uses two 200mm low sound units, two 127mm midrange units, one titanium dome tweeter and a horn tweeter. The form of the film uses a horn tweeter. In the form of a film, a horn tweeter is used, and a titanium diaphragm dome is used to appreciate music. Replay sound quality is very comprehensive, using multi-channel sound equalizer and 7-channel sound quality equalizer, using digital skills to build powerful cinema sound in a small family space.
1.3 low voice speaker
In the past, in order to reach the real low and low sound output, the painter can use the large cone. Such as KLIPSCH's 27-inch ultra-low-sounding speaker; EV's 30-inch tapered ultra-low-sounding speaker. In recent years, the booming of home theater audio malls has promoted the development of large-amplitude ultra-low-sound loudspeakers. Representative products are: 18-inch ultra-low acoustic speakers from the AURASOUND radial é’• magnetic system. A large linear motion scale is achieved by manipulating the thickness of the top plate and applying a 0.5 inch voice coil in a 2 inch long magnetic gap. PINEER's ultra-low-sounding speakers have a common feat. From the outside, everyone can think that it has no overhang. In fact, it pastes the layout of similar hanging edges behind the diaphragm, allowing the diaphragm to be in a cylindrical layout. Make a longer piston movement. The ultra-low-sounding speaker's cone can move up and down up to 2cm, 6-inch low-pitched speakers, up to 100dB sound pressure level at 50Hz, which is difficult to reach with traditional low-pitched speakers. Representative products, such as KEF's AV1 automatic active ultra-low sound box.
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