In recent years, JBL of the United States has taken many effective new technical measures in the design and production to continuously improve various performances of the speaker system.
Tweeter:
The patented titanium alloy diaphragm technology that is lighter than thin paper, harder than steel, and has a thickness of only 0.001 inches with three-dimensional diamond * grain blanking. This technology not only makes the treble clearer and brighter, but also can withstand greater impact. force.
The voice coil wire adopts a special square cross-section aluminum alloy wire, together with a specially formulated insulating patent leather, which makes the voice coil light and dense, which improves the power capacity and the sound pressure sensitivity.
The use of magnetic fluid (MAGNETICFLUID) improves the heat dissipation conditions of the voice coil and enhances the ability to resist overload.
The novel KAPTON material is used as a voice coil support. The thermal conductivity of this material is twice that of conventional materials, and it can withstand higher temperatures to ensure that the voice coil can still work normally at high temperatures.
"SONICGUARD" The Bodyguard of Sound "is a breakthrough invention of JBL. It prevents the damage of the tweeter caused by the sudden high-power peak signal or long-term overload. The difference between SONICGUARD and the general limit protection technology, It is because 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 shunt the overload energy and destructive peak signal to a safe level. This process is silent It is carried out automatically in the interest-free state, which achieves the purpose of protecting the speaker unit without sacrificing the sound quality (music and clarity).
Midrange / midrange unit:
In order to cooperate with the new model cylinder, JBL specially developed 2447 and other large-scale compression drivers. The high frequency response is flat to 18KHZ, and the mid-range sound quality is improved, so that the entire mid-high section of the sound is clearer and clearer without harshness. Two-way speaker system, its performance is comparable to three-way system.
Bass unit:
SVG and VGC heat dissipation design 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 energy. The output sound pressure level is reduced, then the sound distortion is increased, and finally the voice coil will be burned. In order to effectively increase the output, the heat dissipation conditions of the voice coil must be improved. JBL's SVG and VGC patented designs have made multiple air slots on the throat of the driver, using the vibration of the diaphragm to form air convection, which can effectively dissipate 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.
Using high-performance magnetic steel material-magnetic steel. Its magnetic field strength is more than 10 times higher than 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
The high-quality high-quality crossover is also a key component that directly affects the timbre. The frequency divider must be accurately matched with the characteristics of the speaker unit to obtain flat characteristics. The correct frequency division point and small nonlinear distortion can obtain good sound quality. JBL successfully improved the original frequency division slope 12DB / octave To 18DB / octave, the sound is clearer, and the mutual interference between the units is minimized. The design, selection and manufacture of the frequency divider used in JBL speakers have made great efforts, using special four-lead resistance, ultra-low resistance inductors and precision low-loss styrene capacitors, etc. Wait.
New concept of high-tech products-EON series active speakers:
The EON series of active speakers adopt a new concept design and advanced production technology, making it the most popular, cheap and versatile portable product.
The EON series speakers use high-performance magnetic material magnetic steel, aluminum instead of steel basin and plastic instead of wood box, and a special and strong integrated box body structure, which greatly reduces the weight and is easy to carry. Easy to install fixedly.
EON's high and low sound units all adopt the above new technical measures, and for the first time also use reverse serial differential dual voice coil technology, so that the impedance of the speaker shows the "pure resistance" nature, so the frequency response is particularly wide and flat , The sound is extremely clear and beautiful.
EON's built-in power amplifier heat dissipation makes good use of the air flow generated by the sound hole of the speaker when the diaphragm vibrates, bringing heat to the outside of the box, so he 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 provisions of the American Electrotechnical Standard AES2-1984, as long as the speaker unit passes the 2-hour full power load test, it will be considered qualified. JBL will automatically increase this test standard to 300 hours, which is JBL's guarantee for user quality.
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