Tag Archives: outdoorspeaker
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.
What is the true surround sound
What is the true surround sound
Usually in the auditorium surround sound system with surround back speakers are set up, but not audio-visual room with rear mounted two speaker surround sound even if the. If only from the front two speakers and then to the back of a pair of speakers in parallel,super tweeter then the sound of the latter is identical with the former, no surround-sound decoding process, and can not really known as the surround sound system. So, in the end surround sound decoding section is like? DVD or home video tape of the two current major software, with only the sound part of the left and right channel signal space, usually the most simple Dolby matrix encoding requires the left and right, center and surround four groups of signals, how can “plug” into the space of only two-channel software in the game? The answer is that the two signals into the central and surround left and right channel signals in the original. Center channel signal is about two channels have a message,car audio surround sound is the difference between the two. In other words, about two-channel phase is the center channel signal, the signal is reversed surround channels. In this way, the original four-channel signal to squeeze into the two channels, while the surround sound decoder, which is to be mixed with the central and surround left and right channel signal separation (decode) them, and then by the sound channel amplifiers with a power amplifier,marine speaker to promote the speaker. So, surround speakers, center channel and two in the front left and right speakers the sound is not the same, do not think, simply draw a line behind a group of speakers, the front left and right speaker signals sent in parallel on You can get surround sound effects.
the latest achievements in developing electrostatic loudspeaker.
Query information from the Internet to see, electrostatic speakers nearly 10 years of scientific research, over the previous 60 years combined. Among them, Japanese companies SONY Corporation and China SHT even more prominent. More important are:
Dutch Philips optical coupler impedance matching circuit “to solve the static and low-impedance output amplifier speaker matching.
Germany EWD s use of “strip of piezoelectric polymer diaphragm,” the film in use, take along the spiral wound on the cylinder surface, can constitute a sound wave or sound transmission line.
SONY Corporation of Japan, the “composite laminated electrostatic loudspeaker sound pressure” to “fixed electrode – the diaphragm – a fixed electrode – diaphragm …” technical solutions to address the shortcomings of larger electrostatic speaker. “Aniline, thiophene monomer synthetic polymer materials such as high-impedance surface of the diaphragm,” mainly to solve the moisture problem.
China SHT s “Ring-diaphragm” is surrounded by low resistance, high resistance of the new middle diaphragm; pressure exceeding 10KV of “plastic-mounted electrode”; substantial increase in sound pressure level of the “network connection point fixed electrode “; thickness of 2 ~ 12μm, the” polyester – alloy – aniline “form constitutes a” composite diaphragm “; and efficient non-metal of” plastic electrostatic speakers “and so on.
the working principle of electrostatic speakers.
The typical structure shown in Figure 1 electrostatic speakers: As the two fixed electrodes and diaphragm, respectively, constitute a (double) capacitor structure, so the electrostatic speaker (English name: Electrostatic Loudspeaker, referred to as ESL), also known as capacitive speaker (English name: Condenser Loudspeaker .)
With the widespread use of electric current speaker compared the structure of electrostatic speakers is much simpler, it is no magnet, but to use the audio signal source and the DC polarization power of synergy to promote the diaphragm (movable electrode) surface accumulation of certain charge density, as well as the direction of the diaphragm by alternating electric field, accompanied by the audio signal source and the vibrating sound of the speaker.