Product Details
This is a 18mm thin speaker with plastic frame, it use PCB contact. The main body of the 18mm speaker unit is made of a very durable and powerful ferrite material, which generates a static magnetic field. The 18mm speaker unit works when the current passes through the voice coil and moves back and forth. This component moves according to the signal it receives. The voice coil is connected to a thin film to amplify all vibrations, that is, the sound you hear from the headphones. The 18mm speaker unit can be applied to cordless phoneã€mobile for older people and recorder pens.
Rated Input |
0.3W |
Max Input |
0.6W |
Freq.range |
850Hz |
Impedance at IKHz |
8±15%Ω |
SPL at 1KHz |
88±3dB |
About the speaker unit
Why can the speaker unit sound independently but hide the speaker unit in the speaker box?
After knowing the principle that the single unit moves back and forth according to the "Fleming's left-hand rule", squeezing the air to generate sound, it is inevitable to think, if only the speaker unit can produce sound, why do the speakers on the market always The speaker unit is hidden in the speaker?
The speaker unit and the speaker are inseparable from each other. When the diaphragm moves forward, the air in front of the diaphragm is squeezed to form dense waves, while the air behind the diaphragm is loosened to form sparse waves. Conversely, when the diaphragm moves backwards, dense waves are formed behind the diaphragm and sparse waves are formed in the front.
If you let the speaker unit operate in a naked state, you will feel that the sound signal emitted is very hollow, that is because after the speaker unit moves back and forth continuously, the front and rear sound waves react with the diaphragm as the dividing point, and weaken the volume of each other. The appearance of hollow sound is because the bass wavelength is longer, which makes it easy to weaken each other, leaving only the high-pitched part of the signal, which also makes the sound signal weak.
In order to prevent this from happening, when making speakers, baffles are often used to isolate the space before and after the diaphragm, so as to avoid the situation where the front and rear sound waves cancel each other out and weaken, so that the signal can be more completely presented. Speakers, it is also easier to hear a more complete sound performance.
However, since the wavelength of the bass is longer than that of the treble, in order to fully present the performance of the mid-bass signal, the sound wave must be completely blocked through an infinite baffle, but this is only an idealized situation, considering the use of space, and It is not possible to have an infinite baffle. Around the 1920s, the idea of encasing the sound in a loudspeaker came about, which is the origin of the loudspeakers you and I see today.
FAQ
Q: Do you provide sample ? Is it free?
A: If the sample is low value, we will provide the free sample with freight collect. But for some high value samples, we need to collect the sample charge.
Q: What is your term of payment?
A: 30% down payment before producing and 70% balance payment before shipping.
http://www.acousticunit.com/
Company Profile
