In recent years, JBL Corporation of the United States has taken many effective new technical measures in design and production to continuously improve the performance of speaker systems.
Treble unit:
It is a patented technology of titanium alloy diaphragm that is lighter than thin paper and harder than steel and has a thickness of only 0.001 inch. It not only makes the treble clearer and brighter, but also can withstand more impact. force.
The voice coil wire is made of special square-section aluminum alloy wire, and specially formulated insulating patent leather makes the voice coil light and dense, which improves the power capacity and improves the sound pressure sensitivity.
The use of magnetic fluid (MAGNETICFLUID) improves the sound coil cooling conditions and enhances the overload resistance.
Using the novel KAPTON material as the voice coil holder, this material has a thermal conductivity twice that of conventional materials and can withstand higher temperatures, ensuring that the voice coil will still work at high temperatures.
"SONICGUARD" sound bodyguard" is a breakthrough invention of JBL, which prevents sudden high-power peak signal or high-frequency damage caused by long-time overload. The difference between SONICGUARD and general limiting protection technology, It is that it can pass many signals in the music that are very dynamic and whose energy is not enough to burn the voice coil; it will automatically attenuate the overload energy and the destructive peak signal to a safe level. This process is silent. Automatically carried out in a state of no interest, achieving the goal of both protecting the speaker unit without sacrificing sound quality (music and clarity).
Midrange / Middle Treble Unit:
In order to cooperate with the new model tube, JBL specially developed a large-scale compression driver such as 2447, the high-frequency response is flat to 18KHZ, and the mid-range sound quality is improved, so that the sound of the whole middle and high section is clearer and brighter and not harsh, and is composed of such a unit. The two-way speaker system is comparable in performance to the three-way system.
Woof unit:
SVG and VGC heat-dissipating transducers. The woofer unit often has to withstand a lot of power continuously. Only a small part of the film energy is converted into sound energy, and most of it becomes harmful heat. After the voice coil is heated, at the beginning The output sound pressure level is reduced, then the sound distortion is increased, and the voice coil is finally burned. In order to effectively increase the output, it is necessary to improve the heat dissipation condition of the voice coil. JBL's SVG and VGC patents have been designed with multiple air slots on the throat of the drive, which use the vibration of the diaphragm to create air convection, which effectively dissipates heat.
The extra large 4-inch voice coil and large diaphragm not only increase the power capacity, but also extend the frequency response and improve the distortion.
High-performance magnetic steel material - magnetic steel. Its magnetic field strength is more than 10 times higher than that of traditional magnetic materials. High-efficiency magnetic steel improves the sound pressure sensitivity of the speaker, improves the dynamic range, and reduces the weight.
High-power, low-loss, high-quality crossover
High-power, high-quality crossovers are also key components that directly affect the sound. The frequency divider must match the characteristics of the speaker unit accurately to obtain flat characteristics, correct crossover point and small nonlinear distortion to achieve good sound quality. JBL successfully improved the original crossover slope of 12DB/octave. By 18DB/octave, the sound is clearer and the mutual interference between the units is minimized. The design of the crossover for the JBL speaker, the selection of materials and the preparation of the work have been a great effort, using a special four-lead resistor, ultra-low resistance inductor and precision low-loss styrene capacitors, etc. Wait.
A new concept of high-tech products - EON series of active speakers:
EON (Yi'an) series of active speakers adopt new concept design and advanced production technology, making it the most affordable and versatile portable product.
EON series speakers adopt high-performance magnetic material magnetic steel, aluminum-made steel basin frame and plastic-made wood box, special and sturdy integrated box body plate structure, which greatly reduces the weight and is easy to carry. Easy to install.
EON's high and low-range units all adopt the above-mentioned new technical measures. For the first time, the reverse-series differential dual voice coil technology is adopted, which makes the impedance of the speaker appear "pure resistance", so the frequency response is particularly broad and flat. The tone is extremely clear and beautiful.
EON's built-in amplifier coolly utilizes the air flow generated by the speaker's echo hole when the diaphragm vibrates, bringing heat to the outside of the box, so it can be used continuously for a long time in a harsh outdoor environment. The test of 300 hours full power load---JBL guarantees your quality.
According to the American electrician's standard AES2-1984, the speaker unit is qualified only after passing the test of full power load for 2 hours. JBL automatically raises the test standard to 300 hours. This is JBL's guarantee of user quality.
An anti-theft system is any device or method used to prevent or deter the unauthorized appropriation of items considered valuable. Theft is one of the most common and oldest criminal behaviors specially happened popularly at Telecom base site and power station from ASEAN, Africa and Asia, etc. Our anti-theft systems via GPS tracking management technology have been evolved to match the introduction of new inventions to stationary batteries and the resulting thief been caught as soon as stealing the batteries.
At present, there are huge number of Telecom base stations all over the world, the vast majority of sites are located in remote areas with any unattended which are stolen seriously. Theft violently destroy the infrastructure of the base station and steal batteries, resulting in serious losses such as communication breaking and stations maintenance. The conventional protective measures, such as iron guardrail, external positioning alarm device, and anti-theft screw, not only are unable to achieve your desired effect, but also have the disadvantages of higher cost, lower battery life and weaker concealment.
Our battery anti-theft solution and Monitoring Tracing system is comprised of GPS module and software operation platform. This equipment includes GPS satellite positioning system and network positioning system, that is GPS+LBS dual intelligent positioning mode. It has the function of satellite positioning, base station locating, remote reset, remote upgrade, fence alarm, tracking replay, battery low voltage alarm, vibration alarm,etc.
The utility model aims at resolving the problem that an Uninterrupted Power Supply (UPS) storage battery of a field station can not guard against a thief effectively and providing a global position system (GPS) and anti-theft monitoring tracing system for a storage battery. A terminal module is connected with a management platform and mobile phone signals through a mobile communication network. The terminal module comprise a GPS module, a central processing unit (CPU) module connected with a mobile communication network module and a vibration transducer connected with the CPU module.
Battery GPS Anti-Theft System,Battery GPS Tracker,Car Truck GPS,Battery Anti Theft Controller
Shenzhen Daceen Technology Co., Ltd. , https://www.daceen-sz.com