Speakers with different diaphragm sizes and materials have different optimal working frequency bands. The larger the diameter of the speaker, the better the low-frequency characteristics. Therefore, when other conditions are the same, the 18 inch bass effect is certainly better than the 15 inch bass effect.
The better the rigidity and brittleness of diaphragm material and the lighter the mass, the better the high-frequency characteristics of playback. Many tweeters use titanium film or indium film as diaphragm material in order to improve its high-frequency characteristics; The diaphragm of subwoofer is generally made of paper, carbon fiber, bulletproof cloth and rubber (edge) to facilitate bass reproduction.
Using the frequency divider, the high-frequency signal can be sent to the tweeter, and the low-frequency signal can be sent to the bass speaker. The high-frequency and low-frequency signals go their own way, making full use of the working frequency band advantages of their respective speakers, so as to ensure that the speakers of different working frequency bands play a full role and make the playback characteristics of each frequency more balanced and consistent.
Detailed introduction to quality characteristics of loudspeaker unit
The speaker unit determines the ultimate potential of the whole speaker and plays a leading role in the sound performance of the whole hifi system. Under the current technical conditions, it is still impossible to produce a perfect unit. That goal is still decades later, because it requires the unit to have the same density as air, move completely and evenly at all frequencies, and have no distortion of any kind.
We have a long way to go, but we should also be full of confidence. At this moment, significant progress is taking place in the field of material science, and many achievements have been made in the past decade. I am sure that new breakthroughs will be made in two or three years.
We benefit from significant advances in computer simulation of mechanical behavior, as well as extensive research in the aviation, automotive and sports leisure industries to replace expensive and heavy traditional materials with lightweight high-performance materials. Now we have Kevlar, carbon fiber composite and aluminum diaphragm. In the near future, we will have artificial diamond, ultra-low density silicon glass, new metal single crystal, carbon single crystal and new composite materials.