The 10-inch midrange speaker is coated with a 50mm dome-top midrange diaphragm with natural fiber braided special damping for natural and accurate sound. High-power aluminum skeleton voice coil with copper-clad aluminum winding, increased power output, guided phase resonant structure, reducing the Q value of the unit resonance peak, reducing distortion, and widening the low-frequency response range.
The unique dual-magnet full-symmetric magnetic circuit system, low distortion phase-conducting resonant structure, high sensitivity, further reducing distortion. The low-distortion phase-conducting resonant structure has a venting hole behind the 10-inch mid-range loudspeaker diaphragm, and at the exit of the aperture is a large-volume, strong-absorbing, non-resonant closed back cavity. The vibration system includes a diaphragm, a voice coil, and a small amount of air volume behind the diaphragm. The vent hole and the enclosure cover form an inverted acoustic resonance system. The air volume inside the vent hole determines the tuning frequency of the vent hole near the midpoint of the impedance curve peak. Reduce the amplitude of the 10-inch midrange speaker in this frequency band to improve the distortion. The energy below the tuned frequency band is absorbed by the cavity, so the sound pressure output can be smoothly attenuated in the low frequency range, and is equivalent to an acoustic Qualcomm close to 24db/oct. The filter, because the main distortion of the 10-inch midrange speaker occurs in the resonant frequency range, through this low-distortion phase-conducting resonant structure, the distortion of this frequency band can be depressed, so that the speaker will be in a low-distortion working state at the entire working frequency. In addition, even if the low-frequency segment of the filter is not cleaned, the speaker can't emit these sounds due to the low-distortion phase-conduction resonant structure acoustic filtering.
In the spectrum analysis of various program signals, most of the instruments and human voices are distributed in the middle audio segment below 4000 Hz, so the information density of the entire middle audio segment is quite high. In the field of electroacoustic technology, people usually use the 1 kHz signal commonly used in testing as the center, and the frequency range between one octave below 1 kHz and two octaves above 1 kHz is 500~4000 Hz as the intermediate frequency range. Usually we want the 10-inch midrange speaker unit to have a flat frequency characteristic in the above frequency range, and hope that it can function as a bridge well, and the low frequency unit and the high frequency unit are very sensitive in terms of sensitivity and tone. Well connected, so we say that the replay characteristics of the IF unit will have a significant impact on the overall performance of the entire speaker. For this reason, the choice of a 10-inch midrange speaker unit is in the most important position in the selection of all speaker units.
In fact, it is quite difficult to make a 10-inch midrange speaker that meets the above requirements. It is not an easy task to choose an intermediate frequency unit that can meet these requirements. From the technical parameters of the 10-inch midrange speaker, the effective frequency range of many 10-inch midrange speakers on the market can meet the above-mentioned frequency response requirements, but the problem lies in the word "effective". As we mentioned earlier, the effective frequency range of the speaker unit is usually based on a 10dB drop in the average sound pressure level of the speaker unit. Some 10-inch midrange speaker units, although indicating their frequency range, are not It is indicated that its frequency range is measured under the condition of how many decibels the error is, which is easy for many users to misunderstand. A good-performing 10-inch mid-range speaker unit tends to have the same frequency range as a poor-performing 10-inch mid-range speaker unit, and sometimes its frequency range looks even narrower than a poorly performing 10-inch midrange speaker, but good The IF unit has a flat frequency response in its frequency range, and the poorly performing IF unit tends to exhibit various significant nonlinear distortions. If there are two different types of intermediate frequency units, the frequency ranges of the two intermediate frequency units are very close, and one intermediate frequency unit has no obvious peak-to-valley points in the whole frequency range, which indicates that its sound pressure is relatively uniform and the nonlinear distortion is small; Another IF unit has many distinct peaks and valleys over the entire frequency range. Although its effective frequency range is also satisfactory, it is obvious that the use of this IF unit does not meet the minimum requirements for Hi-Fi speakers.
In recent years, many speaker manufacturers at home and abroad sometimes directly use some small-caliber low-frequency speakers as the intermediate frequency unit of the speaker. Since the resonant frequencies of these low frequency speakers are generally below 100 Hz, the lower limit of the reproduction frequency of the intermediate frequency unit can be greatly reduced, and the intermediate frequency reproduction characteristics of the speaker can be improved. However, there is one point that must be noted. In order to reduce its resonant frequency, the woofer has a flower opening on its basin. When we use the woofer as an intermediate frequency unit, we must place one on the back of the woofer. Seal the back cavity with a certain volume and fill the appropriate amount of sound absorbing material. This can prevent the sound waves radiated from the back side of the cone from interfering with the sound waves radiated from the rear side of the low-frequency unit cone in the speaker, and also can prevent the resonance frequency of the original woofer from rising too much after the rear chamber is installed.
