The so-called high-bass split speaker refers to the speaker that plays the high-frequency part of the sound by a tweeter, and the low-frequency part is played by a subwoofer, instead of the task of playing the entire audio band by one speaker. In professional speakers, the tweeter is generally a horn speaker, and the woofer is available in direct and airflow. Regardless of whether it is internal or external, the high and low sound split speakers must adopt a crossover and playback solution. The main reasons are as follows.
TOP 1
Make all kinds of speakers work in the most suitable audio segment
Speakers with different diaphragm sizes and materials have different operating bands. The louder the speaker, the better the low frequency characteristics. Therefore, under the same conditions, the 18-inch bass effect is definitely better than the 15-inch bass effect.
The better the rigidity and brittleness of the diaphragm material, the lighter the quality, and the better the high frequency characteristics of the sound reproduction. Many tweeters use titanium film or indium film as the diaphragm material to improve their high-frequency characteristics. The diaphragm of the woofer generally uses materials such as paper, carbon fiber, bulletproof cloth and rubber (edge) to facilitate bass reproduction.
The frequency divider can be used to send high-frequency signals to the tweeters, and the low-frequency signals are sent to the woofer. The high- and low-frequency signals are used in different ways, and the operating band advantages of the respective speakers are utilized as much as possible to ensure the speakers in different working frequency bands. Give full play to make the playback characteristics of each frequency more balanced.
TOP 2
Overcoming the cutting distortion caused by the vibration amplitude of the diaphragm of different frequency sound speakers
When the speaker is pronounced, its vibrating bass vibration amplitude is large and the high-pitched vibration amplitude is small. Theoretically speaking, the vibration amplitude of the speaker cone is inversely proportional to the square of the reproduction sound frequency, that is, the same speaker diaphragm, the lower the frequency, the larger the amplitude under the action of the signal voltage of the same amplitude, that is, if the frequency is increased 10 times, the amplitude will be reduced by a factor of 10, or 100 times.
If we use a single speaker to produce a wide range of frequencies, it is very difficult to have a very wide amplitude of vibration due to the mechanical properties of the diaphragm. This will inevitably cause distortion of the sound and make the sound quality reproducible. Affected.
The study found that the cutting distortion has the greatest influence on the bass. When the woofer delivers the bass, as long as there is a high-pitched component, it will inevitably lead to cutting distortion, causing the bass to tremble and tremble. Of course, the distortion of the tweeter will also make the treble hoarse, but it will not affect the bass.
TOP 3
Reduce sound interference between different speakers in the same speaker
For tweeters and subwoofers in high and low-range split speakers, although they work in different frequency bands, if the full-range signal is sent to the tweeter and woofer without dividing the frequency, high and low speakers will definitely appear. When the same sound is emitted at the same time, when the same sounds of different speakers meet, it is likely that sound waves interfere with each other.
Anyone with a little common sense of acoustics knows that in the event of sound interference, there will be a series of problems such as comb filtering and standing waves, which will affect the sound reproduction to varying degrees.
After setting the frequency dividing circuit, the treble and woofer respectively obtain their own best working frequency sound signals, and the frequency range of sounds between them is hardly covered, except for a small amount of interference in the speaker crossover point and the crossover cross area. The interference of frequency sounds no longer exists.
The reason why the frequency interference phenomenon exists in the crossover point and the crossover crossover area is very simple, because the frequency division attenuation rate of the frequency divider cannot be made infinite, in the crossover intersection area, especially at the crossover point, the tweeter and the bass. The speaker will have the sound of the other band at the same time, and the phenomenon of sound interference is inevitable. Therefore, the higher the frequency division attenuation rate of the frequency divider, the smaller the frequency division intersection area, and the smaller the sound interference of the speaker.
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