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large search – modified car audio
Modified models: Audi
Modification requirements: to achieve the perfect sound field effects, crystal clear treble, tenor pure full, powerful bass, dive penetration.
Conversion costs: 40,000 yuan
Modification Location: Kunming, automotive supplies company JUVENIA
Conversion program: host using Sony\\ s new machine, the power of 52W × 4, which is to strengthen the speaker\\ s signal strength and sound reduction benefits are great, but the new machine uses several new technologies: DRIVE-S, BBE MP, S-MOSFET amplifier, dynamic Xiang panels, greatly improved sound clarity and quality. Audio part with Sony 10-disc DVD video system, the first sound field used by the U.S. to Fu X Series 6 sets speaker, to the enhanced sound field over the same period sound effects, in the back door panel fitted up fu X Series 6 sets speaker, so that the whole drive space full round sound quality, rich clear. Then, after the Audi car trunk, according to the professional audio design requirements, with a professional subwoofer accurate calculation formula the length, width, height and cubic volume, tailored to the blessing of the P series two bass cabinet, next to the blessing on the United States to install the 301X and the United States with excellent power amplifier power amplifier of a Thunder B2.4004, respectively speakers and two bass drive. The middle and two amplifier configuration modifications required of a professional car audio capacitor American Thunder LB10Y 1. The overall configuration of the bass part of the main highlights to the blessing of strong bass, so a good seal from the Alto car out of the trunk through the bass will be vigorous, strong, powerful. In addition, the conversion process to add the United States Thunder LBIC-5 5-meter signal line 3, the professional power cord, a number of professional speaker wire, insurance, switches and so on.
Modification effect: the conversion took 9 hours, the most critical is the tuning. Full installation, commissioning is completed, the entire sound of the flowing out of the notes and the power to shock people through the Qingche effect, to modify the desired effect.
Introduction to electrostatic speakers..
With digital technology for audio equipment (distortion ≤ 0.02% of CD, LD, etc.) and the emergence of high-fidelity amplifier, the current widespread use of electric speakers as naturally inherent in the (distorted ≥ 2 ~ 3%), has been difficult to keep up with audio technology, and audio playback system has become the bottleneck, so the audio industry is eager to develop a new type of high-performance speakers. On the one hand, many companies are still spare no effort to improve the traditional dynamic speakers, although put a lot of money, but in lower distortion, the future remains uncertain, on the other hand, the scientific community is focused on the development of new speakers. Progress rapidly with ion-type speakers with speakers and electrostatic speakers.
Among them, the best performance ion type (Frequency 10 ~ 25000Hz, distortion ≤ 0.002%), but because of its high costs, especially because of its harmful ionizing gas, universal access is unlikely; with speakers due to the complex structure low efficiency, only at high frequencies (1500Hz and above) have better performance, its use has been greatly limited; therefore, electro-acoustic technology and the industry s attention began to focus on relatively simple structure, excellent performance (frequency response 20 ~ 30000Hz, distortion ≤ 0.05%) of the electrostatic speaker.
selective developing electrostatic loudspeaker.
As the cost and a variety of factors, the industry chose the electromagnetic speaker, in the 30 to 50 years, electromagnetic speakers has been quite widely used.
Total production of 50 million or more. 50 years later, with the LPs and the emergence of audio tape, the speaker once again developed the climax, to the rapid development of dynamic speakers, and its total production has been more than 5 billion.
To the early 1960s, the advent of digital audio, electro-acoustic business only to find, no a speaker can truly reproduce the sound of digital audio signals. So off the third speaker developed climax. At the same time, technology made a belt, Haier type, ion type, fire type, electrostatic and other programs. In 1963, the British acoustic manufacturing company (now Quad Sound Power Company) developed a full range of ESL-63 electrostatic loudspeaker. ESL-63 speakers since human beings have provided the best sound quality, Hi-Fi area to pass the new information. However, ESL-63 up to $ 6,000 price (current price is still close to $ 4,000) does a lot of enthusiasts also elusive. In the same year, Rolfrennwald copper plate made of epoxy resin instead of metal fixed electrode plate electrodes, 1964 Port proposed to replace plastic film coated with a graphite diaphragm made of metal, both in order to reduce manufacturing costs electrostatic speaker program.
the initial development of electrostatic speakers.
March 1927, Lee first obtain the electrostatic speaker of the U.S. patent, 1928, Toulon had a round open two-round aluminum diaphragm and fixed electrode electrostatic speaker; 1929, Danman in the “on the speaker and its development” paper, electrostatic loudspeaker began an academic discussion; the same year, “Radio and Radio Review,” The structure of an analysis of electrostatic loudspeaker;
1930, Hanna proposed theoretical model of electrostatic speakers, that: As the stability of the electrostatic field, electrostatic speaker diaphragm In each unit suffered under voltage electrostatic capacitance of the capacitor and the negative similarity functions; 1931, Vogt presents a production of aluminum manganese alloy electrostatic speaker diaphragm structure; the same time, Meyer was reported in the resonance conditions The measurement results: the efficiency of electromagnetic loudspeaker 7 to 8%, the efficiency of electric speaker l%, the efficiency of electrostatic speakers 2%; Gesell analysis of electrostatic speakers and other speakers of the production costs.