is the sound quality of wireless speakers good enough for high-end applications?
The wireless speaker is expected to solve the speaker cable problem.
They can be set almost anywhere without running the speaker cable.
Many people are hesitant to buy wireless speakers because they may not be able to match the sound quality as the wired model does.
In this article, I will look into whether modern wireless speakers have improved the inferior sound quality of classic models.
Many components are integrated with wireless speakers.
These components will affect the sound quality of the speaker.
Only if all of these components are well designed will the wireless speakers have the best sound quality.
The sound quality of the speaker can only be as good as the quality of the wireless signal.
The old transmission method will use FM, which will cause the speaker to hiss depending on the distance between the transmitter and the speaker and the presence of interference.
Today\'s wireless transmitter uses a different approach.
Audio is sampled and converted to a data stream before transmission.
Then the data stream is sent by radio signal.
Digital Wireless Audio not only realizes CD-
But it also has advanced methods to deal with radio interference.
The audio fidelity of the internal power amplifier also has a great impact on the sound quality of the speaker.
Linear and switchingmode (Class-D)
The amplifier has a completely different working principle.
In order to provide a low output impedance, the linear amplifier has power-
A transistor stage usually consisting of two complementary power transistors.
These transistors are driven by analog audio voltage.
The enlarged signal is proportional to the original audio signal.
However, the power efficiency of this working principle is quite low.
The power stage of the class --
D amps also have two complementary transistors.
MOSFET transistors are usually used at this stage. Class-
D switch this power stage to the voltage rail, resulting in a sine wave voltage.
The square wave output voltage contains several spectral components.
The main energy is located near the switching frequency.
This switch assembly, which is usually located between 300 and 800 kHz, is filtered by subsequent low levelspass stage.
Operation principle of class-
D amplifier nonlinear. The pulse-
The width encoder and switch level can cause harmonic audio distortion.
However, newer amplifiers continue to minimize harmonic distortion.
Newer types of classes-
The D amplifier compares the amplified audio signal to the original audio signal and is able to compensate for the offset, thus reducing the harmonic distortion of the amplified signal.
However, this feedback mechanism is sometimes overdone.
The result is a super audio amplifier.
Low audio distortion.
However, in the listening test, this amplifier does not sound as good as another one with regular distortion.
The Speaker itself and the housing of the bass and treble speakers are critical for good performanceQuality speakers.
Poor design of speaker housing usually results in poor sound quality.
When it comes to making a good speaker, the quality sensor is the key.
There are some challenges in designing wireless speakers.
The speaker needs integrated power supply, power amplifier and wireless circuit.
All of these components affect the sound waves inside the speaker.
These parts are usually quite large.
Therefore, they affect the air volume of the speaker.
In addition, the sound waves bounce from these components, which may cause a click, thus affecting the sound.
Wireless Speaker housing designers should not only worry about maximizing sound quality.
In addition, they need to worry about how to place all internal components and how to allow access to electronic controls and indicators.
All of these parameters have an impact on the sound of the speaker.
While some models of wireless speakers have finally begun to emerge, with sound quality close to the wired speakers, there is still room for improvement.