JBL company
The characteristics of the speaker are: high power, 200-300 w；; High sensitivity, maximum sound pressure level110dB; Good frequency response, flat frequency response and excellent transient characteristics.
Unique new technology:
(1) The magnetic pole core of the low-frequency speaker for sound box is quite thick, and it is hollow, and it is embedded with the insert formed by wire cutting. This specially designed magnetic pole core can reduce the weight of the speaker, which is beneficial to heat dissipation and aims to improve the power tolerance.
(2) As an advanced technology, flat wire voice coil was invented by JBL Company. Originally used for woofers, later tweeters were also widely used, with both aluminum wires and copper wires. Flexible flat cable has high duty cycle and high magnetic gap utilization, aiming at improving sensitivity. According to the test, under the same magnetic circuit, the flat wire voice coil can improve the sensitivity by about 1dB compared with the round wire voice coil.
(3) The spherical top unit of titanium diaphragm is also the first success of JBL Company. Young's modulus of titanium material is better than that of aluminum material,
The use of titanium film in high-frequency speakers can greatly broaden the upper limit of high frequency and greatly improve the power capacity. (4)SFG symmetrical magnetic field magnetic circuit titanium diaphragm is a patented technology of JBL company. This patented technology ensures that the FB value distribution on the magnetic gap is symmetrical and equal to the upper and lower positions of the voice coil, including the structural arrangement of magnetic flux balance, which reduces the inductance and heat conduction of the driving source. Effectively suppress low-frequency distortion and improve power carrying capacity and damping characteristics.
Bose company
The characteristics of the company's speakers are: actively using the reflected sound of the listening environment to improve and modify the radiation characteristics of the speakers, and developing world-famous sound field speakers.
Bose's new technology:
(1) Direct/Reflective Speaker Technology. Bose company's speakers use direct/reflection technology to restore the mixed sound reflected from walls, ceilings and floors to the audience, and use direct/reflection theory to show the level and positioning of the sound vividly.
Representative products are 90 1, 70 1 and 50 1 series speakers. (2) Sound airflow bass technology. This technology uses the airflow generated by the "a-logistic mass" structure to couple three independent sound chambers to work, which can reduce the resonance and distortion of the bass unit diaphragm and provide a large dynamic range.
(3) Audio waveguide technology. This technology is a scientific research achievement obtained by bose company after 14 years of research, and has applied for a patent. It is characterized by installing a long curved waveguide in a very small main box structure, thus increasing the low-frequency sense and creating a huge sense of stage space that breaks through the volume limit of the small box.
(4)HOROFINE thin film technology. This membrane technology is made of bamboo pulp and wood pulp, which has perfect balance of plasticity and rigidity. It can meet the three main indexes of converting electrical signals into high-quality sound waves: low density, high Young's modulus and large attenuation index, and can reproduce bright, clear and very natural sounds in middle and high frequency bands.
AR company
The company is famous for creating an air cushion speaker, which uses acoustic suspension technology. It supports the bass unit through air like a spring in a closed box, thus obtaining a deep and powerful bass. This kind of speaker has appeared since 1950s and has been used for a long time.
France focus group company
The company is famous for creating advanced speaker units, and also produces various styles of speakers, which sell well all over the world. Some group companies have advanced loudspeaker manufacturing technology, and they have four internationally renowned important inventions.
(1) has invented a new design called "MVF" (eliminating mechanical vibration) system. Using this system can overcome the shortcomings of mechanical oscillation of traditional cone-basin speakers, reduce the vibration intensity of cone-basin segmentation and ensure high-fidelity playback.
(2) In terms of diaphragm design, Polkevlar cone with registered patent is light in weight and strong in rigidity, which completely solves the problem of sound dyeing.
The frequency response is accurate. (3) Polyglass (polyethylene glass) was invented to treat the diaphragm, so that the diaphragm has high rigidity and excellent internal damping characteristics, and the sound of the unit is smooth and natural, and the music playback is meticulous and accurate.
(4) The newly developed diamond diaphragm in 1990s can reproduce gorgeous timbre.
The speaker of this company is characterized by high sensitivity, and most of its products are above 90dB. The alto and treble units are coaxially installed on the center line of the panel, which can produce accurate audio and video.
Danish Dali company
The company attaches great importance to the speaker audiometry project, and never takes the objective test results as the final basis. The company has an audiometric jury composed of people with rich practical experience and professional music literacy, which makes subjective evaluation on the sound quality of each new Dali product to ensure the unique style of Dali products.
The most striking features of powerful speakers are: the front panel is as narrow as possible to control the sound diffusion angle; The box is very hard, and has a surface absorption layer device, which can effectively eliminate resonance, make the sound field stable, and have a very accurate sense of sound positioning. The units used in the loudspeaker are all tested and matched by the computer.
The characteristics of the British
Tianlang's coaxial speakers are well-known all over the world, and the problem of phase distortion has been successfully solved. KEF company invented "UNI-Q" coaxial technology, which realized the ideal of coaxial sound of treble and bass and made the sound image of body history accurate. QUAD specializes in electrostatic speakers and spares no effort to improve and develop them; Celestion and Rogers' small speakers have a 2dB bump on the test curve at 2000Hz. Some people think that this subtle difference will definitely affect the timbre, but the products of these two companies are representative products of British small boxes, which may be the secret of the timbre of Voice of England.
New flat speaker
1996, British verity Company and NCT Company successively announced the successful development of new ultra-thin flat-panel speakers, which is indeed a major breakthrough in speaker manufacturing technology.
The thinnest thickness of this flat speaker is 3mm, and the thickest thickness is less than 25 mm. The effective radiation area can be determined according to the design, ranging from 25cm2 to1100m2. Verity NXT speakers use electromagnetic drivers, and NCT uses piezoelectric ceramic drivers. The vibrating plate is made of carbon fiber and paper, and the weight of the speaker is very light. The frequency response range of the speaker is very wide, which shows that the sound quality is good. This kind of flat speaker does not need a box, and can be hung on the wall or installed on the ceiling like a picture. Experts predict that this ultra-thin flat speaker has bright application prospects and will become a new generation speaker in 2 1 century.
Make the human body calendar sound and image accurate; QUAD specializes in electrostatic speakers and spares no effort to improve and develop them; Celestion and Rogers' small speakers have a 2dB bump on the test curve at 2000Hz. Some people think that this subtle difference will definitely affect the timbre, but the products of these two companies are representative products of British small boxes, which may be the secret of the timbre of Voice of England. New flat speaker
1996, British verity Company and NCT Company successively announced the successful development of new ultra-thin flat-panel speakers, which is indeed a major breakthrough in speaker manufacturing technology.
The thinnest thickness of this flat speaker is 3mm, and the thickest thickness is less than 25 mm. The effective radiation area can be determined according to the design, ranging from 25cm2 to1100m2. Verity NXT speakers use electromagnetic drivers, and NCT uses piezoelectric ceramic drivers. The vibrating plate is made of carbon fiber and paper, and the weight of the speaker is very light. The frequency response range of the speaker is very wide, which shows that the sound quality is good. This kind of flat speaker does not need a box, and can be hung on the wall or installed on the ceiling like a picture. Experts predict that this ultra-thin flat speaker has bright application prospects and will become a new generation speaker in 2 1 century.