Plug-in speakers Initial awareness of plug-in speakers can be identified by the process and parameters, the sound quality, and the brand.

A look at the process and parameters

A view of the process is to judge the quality from the appearance of the first part of the sound box, whether the production process is accurate in place, fake and shoddy products generally do not pay attention to these details, so a little attention can be correctly judged. The technical parameters of a plug-in card speaker are nothing more than frequency range, output power and signal-to-noise ratio.

Frequency range is generally 90Hz~20KHz, 90Hz represents the extension value of the plug-in speaker in the low frequency direction, the lower the number, the better the low-frequency response of the plug-in speaker :20KHz represents the high frequency extension value that the plug-in speaker can reach, the higher the number, the better the audio characteristics.

Output power is a reference index of the plug-in speaker, how many watts is expressed, the index can not explain the quality of the speaker, only indicates that to promote the power amplifier required by the plug-in speaker, the battery needs to have the required output power.

signal-to-noise ratio refers to the voltage of the output signal of the amplifier and the noise voltage of the output at the same time, often expressed in decibels, the higher the signal-to-noise ratio of the device indicates that it produces less noise. Generally speaking, the higher the signal-to-noise ratio, the less noise mixed into the signal and the higher the quality of sound played back. Otherwise, the opposite is true. Generally, the signal-to-noise ratio should not be lower than 70dB. The signal-to-noise ratio of a hi-fi speaker should be higher than 110dB. The minimum signal-to-noise ratio marked by a plug-in speaker is usually between 70dB and 90dB.

Second sound quality

Card speakers are mostly plastic material, the smaller the material density of the speaker shell, the greater the vibration generated by the box when the sound is emitted, from this aspect, card speakers to a certain extent is difficult to achieve the ultra-low sound effect, which is almost all card speakers common disease. But the so-called extreme, although the card speaker in the bass is slightly insufficient, high frequency performance can do very well. Different design structure, different cavity size, the sound quality of the card speaker may still be very different.

Three recognition brand

Good plug-in card speakers are well-made gold-plated or chromium-plated brand marks, if the trademark is not registered mark, there is no anti-counterfeiting certification mark on the outer packaging, there is no warranty card inside the packaging, most of these three products are counterfeit and shoddy.