Old burning said that balanced output can improve the sound quality of headphones. Is this metaphysics?
The balanced connection of the earphones is the hot spot in the past two years. The enthusiasts often discuss the improvement of the sense of hearing when the headphones are balanced. Many people have heard that the balanced drive can push the headphones better and the sound field. It will be even bigger. I believe that some people will think that this kind of viewpoint is metaphysics. I think that the balance connection is just a gimmick. But I don't think so. Balanced connections are justified. It can really bring about improvement.
What are the forms of the headphone balance interface?
In order to experience balanced output, the DAC and amp that support balanced input and output are an essential part and the most basic condition. In addition, there are many aspects of the headphone interface, which balances the impression of many people. The biggest feature of the connection is the 2.5mm or XLR interface.
Balanced connections are currently available for both in-ear and headset. For in-volume, portability, etc., in-ear headphones tend to have a four-section 2.5mm interface, while head-mounted models typically use a four-pin XLR connector. There are exceptions. Some Japanese manufacturers, led by Sony, use dual 3.5mm interfaces as balanced inputs.
How to get a headset with a balanced interface
The balanced input of the headphones is optional. Many high-end models, such as Sennheiser HD800, Beyerdynamic T1 II, and Weston W60, have original balance lines. In addition to the original wire. There are a large number of third-party upgrade lines available on the market. Although there are many wire options, it is not possible to use balanced input for all headphones without using violent magic.
If it is an in-ear earphone, basically most of the interchangeable earphones can achieve balanced input. The situation of the headset is more complicated, and many single-sided earphones cannot be balanced by changing the line. Input. Because the left and right units share the grounding, separation cannot be achieved. The only way is to change the internal wiring and replace the female seat. The risk is relatively large.
Balanced connections come from professional fields
Why the interface can become the most important feature of the balanced connection of the headset is related to the implementation principle. In fact, the balanced connection was first used in the professional audio field, in order to reduce the impact of the wire on the sound. Many enthusiasts have a deep understanding of the wire, in order to It can reduce the distortion introduced by the wire, and thousands of fever wires are undoubtedly frequent visitors in the HiFi system.
In professional audio, the wire is also the key. Due to the environment such as the studio, the wiring distance is very large, and it is easy to introduce noise during transmission. In addition, the commercial needs to consider the cost, so the high-priced fever line must be Cannot be applied to the professional field, and the balance connection was born to solve this problem.
How is balanced connection achieved?
The so-called balanced connection is actually the same. First, the output device will prepare two sets of the same signal for each channel, and then one of the sets is inverted 180° as the cold signal, while the original phase is the thermal signal. After the preparation is completed, the two sets of signals will be sent to the receiving device through the balance line, of course, some noise will be introduced during the transmission.
After receiving the two sets of signals, the receiving device will invert the cold signal 180° again. It is worth noting that the introduced noise will be inverted together with the original signal. At this time, the noise in the hot signal It is exactly 180°. In the whole balanced connection, the last thing to do is to superimpose the two sets of signals, and the noise that has been inverted in the process will be eliminated.
Balanced connections require the use of two sets of hot and cold signals, which means that each channel of audio signal transmission, including the necessary grounding, requires at least three signal lines. When transmitting two-channel audio signals, even in the case of shared grounding It also needs five roads. Obviously, the four-band balanced interface of the headset does not meet this requirement. What is the difference between the balanced output of the headset?
What is the difference between the balanced connections of the headphones?
The balanced connection used in headphones is not really a balanced connection. It is just a common name. The correct name should be BTL (bridged load) output. The purpose of use is not to eliminate the noise introduced in the wire, but to Reduce crosstalk between left and right channels and boost output power.
When using the BTL output, the positive and negative poles of a single channel of the earphone will be driven by two op amps respectively, and the advantage of this is that the two sets of signals of the positive and negative phases can be used to obtain higher output power at a lower voltage. At the same time, because the grounding of the left and right channels is separated, the crosstalk of the channel is reduced, and the resolution is improved. Therefore, the balanced output pushes the earphone better, and the sound field is larger. There is nothing wrong with it. Many enthusiasts have heard the balanced connection. After the headphones, I did get such feelings.
This is the truth of the headset balance connection.
The balanced output used by the headphones is not the balanced output in professional audio. The concept of the two is different. The professional name is BTL output. It is just that everyone is used to it. The balance ear is different in circuit design, and the left and right channels are not simply separated. The common grounding, through different circuit design, can effectively increase the output power and improve the channel separation. Therefore, the balanced connection of the headphones is not metaphysical, it can bring upgrades.
What are the forms of the headphone balance interface?
The balanced input of the headphones is optional. Many high-end models, such as Sennheiser HD800, Beyerdynamic T1 II, and Weston W60, have original balance lines. In addition to the original wire. There are a large number of third-party upgrade lines available on the market. Although there are many wire options, it is not possible to use balanced input for all headphones without using violent magic.
Balanced connections come from professional fields
Why the interface can become the most important feature of the balanced connection of the headset is related to the implementation principle. In fact, the balanced connection was first used in the professional audio field, in order to reduce the impact of the wire on the sound. Many enthusiasts have a deep understanding of the wire, in order to It can reduce the distortion introduced by the wire, and thousands of fever wires are undoubtedly frequent visitors in the HiFi system.
How is balanced connection achieved?
The so-called balanced connection is actually the same. First, the output device will prepare two sets of the same signal for each channel, and then one of the sets is inverted 180° as the cold signal, while the original phase is the thermal signal. After the preparation is completed, the two sets of signals will be sent to the receiving device through the balance line, of course, some noise will be introduced during the transmission.
Balanced connections require the use of two sets of hot and cold signals, which means that each channel of audio signal transmission, including the necessary grounding, requires at least three signal lines. When transmitting two-channel audio signals, even in the case of shared grounding It also needs five roads. Obviously, the four-band balanced interface of the headset does not meet this requirement. What is the difference between the balanced output of the headset?
What is the difference between the balanced connections of the headphones?
When using the BTL output, the positive and negative poles of a single channel of the earphone will be driven by two op amps respectively, and the advantage of this is that the two sets of signals of the positive and negative phases can be used to obtain higher output power at a lower voltage. At the same time, because the grounding of the left and right channels is separated, the crosstalk of the channel is reduced, and the resolution is improved. Therefore, the balanced output pushes the earphone better, and the sound field is larger. There is nothing wrong with it. Many enthusiasts have heard the balanced connection. After the headphones, I did get such feelings.
This is the truth of the headset balance connection.
The balanced output used by the headphones is not the balanced output in professional audio. The concept of the two is different. The professional name is BTL output. It is just that everyone is used to it. The balance ear is different in circuit design, and the left and right channels are not simply separated. The common grounding, through different circuit design, can effectively increase the output power and improve the channel separation. Therefore, the balanced connection of the headphones is not metaphysical, it can bring upgrades.
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