The performance of the headphone speaker is mainly measured by the following indicators:
1, rated power (W) d
There are many kinds of distortions in the earphone speakers. Common distortions are caused by the uneven magnetic field of the speaker and the distortion of the vibration system, which is often generated at low frequencies. Intermodulation distortion (because two different frequency signals are added to the speaker at the same time) , deterioration of sound quality caused by mutual modulation) and transient distortion (because the inertia of the vibration system cannot change with the change of the signal, causing signal distortion). Harmonic distortion refers to the addition of harmonic components that are not present in the original signal during playback. The harmonic distortion of the speaker is derived from nonlinear distortion of the magnetic field, the characteristics of the diaphragm, and the displacement of the voice coil. At present, the harmonic distortion index of a better speaker is no more than 5 [%].
2, the sensitivity of the headphone speaker (dB / W)
The sensitivity of the headphone speaker usually refers to the sound pressure measured at 1 m of the front side of the speaker when the input power is 1 W. Sensitivity is a measure of whether the speaker's details on the audio signal can be replayed in detail. The higher the sensitivity, the more the speaker can respond to all the details in the audio signal. The sensitivity as a Hi-Fi speaker should be greater than 86dB/W.
3. The directional microphone of the earphone speaker has different sound pressure frequency characteristics for radiation in different directions. This characteristic is called the directivity of the speaker. It is related to the caliber of the speaker. When the caliber is large, the directionality is pointed, and the aperture is small and the directivity is small. Directivity is also related to frequency. In general, there is no obvious directivity for low frequency signals below 250 Hz. It has obvious directivity to high frequency signals below 1.5 kHz.
Headphone speaker is small, light weight design with built-in amplifier, diversity wireless receiver only 3.6kg easy to carry 2 easy to install 3: external input port with BGM, etc. 4: earphone speaker can be equipped with WX-4800, easy to carry 5: The earphone speaker can also be used outdoors (when the DC12V external power supply is connected, even if there is no broadcasting equipment, as long as there is one local unit, wireless broadcasting can be performed! The built-in diversity wireless receiver has a weight of about 3.6kg, which is convenient for carrying and handling. Moving in multiple rooms, using a 12cm conical full-range speaker with loud sound and a 10W output amplifier that can make full use of high volume, although it is a small machine, it has a clear sound amplification effect, and has a rich input port such as BGM. The speaker can also be connected to a portable DV12V battery using a tape, CD, MD player, etc. It can also be easily placed on a wall or ceiling using the microphone stand outdoors.
1, rated power (W) d
There are many kinds of distortions in the earphone speakers. Common distortions are caused by the uneven magnetic field of the speaker and the distortion of the vibration system, which is often generated at low frequencies. Intermodulation distortion (because two different frequency signals are added to the speaker at the same time) , deterioration of sound quality caused by mutual modulation) and transient distortion (because the inertia of the vibration system cannot change with the change of the signal, causing signal distortion). Harmonic distortion refers to the addition of harmonic components that are not present in the original signal during playback. The harmonic distortion of the speaker is derived from nonlinear distortion of the magnetic field, the characteristics of the diaphragm, and the displacement of the voice coil. At present, the harmonic distortion index of a better speaker is no more than 5 [%].
2, the sensitivity of the headphone speaker (dB / W)
The sensitivity of the headphone speaker usually refers to the sound pressure measured at 1 m of the front side of the speaker when the input power is 1 W. Sensitivity is a measure of whether the speaker's details on the audio signal can be replayed in detail. The higher the sensitivity, the more the speaker can respond to all the details in the audio signal. The sensitivity as a Hi-Fi speaker should be greater than 86dB/W.
3. The directional microphone of the earphone speaker has different sound pressure frequency characteristics for radiation in different directions. This characteristic is called the directivity of the speaker. It is related to the caliber of the speaker. When the caliber is large, the directionality is pointed, and the aperture is small and the directivity is small. Directivity is also related to frequency. In general, there is no obvious directivity for low frequency signals below 250 Hz. It has obvious directivity to high frequency signals below 1.5 kHz.
Headphone speaker is small, light weight design with built-in amplifier, diversity wireless receiver only 3.6kg easy to carry 2 easy to install 3: external input port with BGM, etc. 4: earphone speaker can be equipped with WX-4800, easy to carry 5: The earphone speaker can also be used outdoors (when the DC12V external power supply is connected, even if there is no broadcasting equipment, as long as there is one local unit, wireless broadcasting can be performed! The built-in diversity wireless receiver has a weight of about 3.6kg, which is convenient for carrying and handling. Moving in multiple rooms, using a 12cm conical full-range speaker with loud sound and a 10W output amplifier that can make full use of high volume, although it is a small machine, it has a clear sound amplification effect, and has a rich input port such as BGM. The speaker can also be connected to a portable DV12V battery using a tape, CD, MD player, etc. It can also be easily placed on a wall or ceiling using the microphone stand outdoors.
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Guangzhou Etmy Technology Co., Ltd. , https://www.digitaltalkie.com