Low frequency is the basis of the music

In a professional orchestra, musicians agree that low frequency is the basis of the music, the soul of the band. In HIFI sound, low frequency is very important sound frequency band. No low frequency, or less low frequency, the music to show the content is incomplete. Low-IF vocals, musical instruments sound spectrum, there are low-frequency components, low or no less, low-IF sound, feel the bottom is not solid, the sound drift feeling. At this time, the low IF sound should be distorted.

Listen to the band close to or playing in the recording position to listen to the scene, drumming, bass, bass, bassoon and other bass instruments, low-frequency sound will perform well, body, texture, detail, aftertaste. Bass music space positioning, performed well. Drum and bass low-frequency sound can be divided open. The sound of a bass instrument is almost completely modified after it is recorded.

Good recording engineer, good recording equipment recorded software, music, low-frequency band and IF, high-frequency band, there is little distortion. Why fever sound low-frequency sound out there will be a big difference? This should be from the sound system on the speaker's low-frequency control force changes, the sound changes to explore.

Why fever sound low-frequency sound out there will be a big difference?

Sound wire design theory: "sound system in any one frequency band, the control of the speaker, from small to large continuous changes, the sound will be dim, virtual, real, tight and hard continuous changes in any one of the audio band, the recording The software is good point, the sound is in the middle of the "reality." This phenomenon is caused by the characteristics of the speaker. This feature is the speaker speaker tuning sound the most difficult, but also the correct sound tuning the target point.

Full frequency of each frequency, the sound adjusted to the "real" mid-point, which is the sound system, the real sense of volume balance. In volume and frequency coordinates, the point connected into lines, this line is the sound of the system "real" the amount of frequency curve. Different with the sound system, there is a different sound "real" the amount of frequency curve. Sound system in this volume frequency curve, the sound of all hearing evaluation index, can have a good performance. At this time, the difference between the sound of different audio systems, but the difference between equipment grades. Different grades of audio equipment, data with a reasonable, full-range sound there is the "real" intermediate point.

Audio equipment on the audio voltage and current effects

This argument, fans can differ from the sound of different wire to experience, or to experiment. Audio wire design theory also put forward an argument: "audio equipment on the audio voltage and current amplification function, the actual power amplifier. Audio equipment at the same audio frequency and frequency of different frequencies have a slight difference between the amplification ratio of the audio frequency and Imbalance. It is this little difference and imbalance in the sound performance of different audio equipment, is the bottom of the sound. There are high-frequency floating, sharp, IF thick, thin, low-frequency virtual, real, sound soft, hard Etc. In this way, there is a sound device audio complementarity requirements.

Sound system speaker control, is the control of sound density. If speakers accept the same audio power, audio current to audio voltage ratio is small, the performance of the sound volume is large, the sound density of small. When the ratio of audio current to audio voltage gradually increases, the volume gradually decreases and the sound density gradually increases. In the process, other auditory evaluation indicators also change. Although this ratio is very small, tuning the sound correctly is very important. Sound system correctly tuning, sound density should be an important regulatory object. "Sound volume balance is the balance of sound density.This balance, there are two meanings, a soft and hard balance of sound frequency at all frequencies. Second, the full range of sound density balance. Audio equipment and audio wire compared to wire in the full range of sound, Current control capability is much greater than the voltage ratio, the dispersion of the unbalance, which seems a bad thing, but from another perspective, the well-designed, well-made acoustical wire has been carefully matched Sound the correct tuning, play a decisive role.
From another perspective to understand the power cord

For the power cord, try it from another perspective to understand: the audio equipment as a black box, do not consider the machine transformer, rectifier, filtering and other links. Only the analysis of audio signal input, amplification, output, at different frequencies, the need to use different amounts of power, mainly the power cord. In the AC 50HZ sine wave valley, rectified, filtered power played a supplementary role.
The role of the signal line, speaker line
The signal line, speaker line easier to understand the role, but also full-band, on different frequencies, different amounts of energy through the audio current, play a balance of control.

Audio cable at different frequencies have different equivalent impedance, different control. If the acoustical wire full-frequency current through the same ability, for the above practice by the speaker characteristics, there will be: no matter what the wire, high-frequency will not have a good sound. It will be a thousand lines soon.

From the audio cable on the audio voltage and audio current control of the size ratio of the difference, as well as the correct adjustment of the sound effect, the sound system, the audio wire is a current control device. As the speaker speaker voice coil has a back-EMF, its influence can be refracted to all aspects of wire, audio wire with Ohm's law is difficult to analyze.
About the instrument frequency
Orchestra for any music performance, in most cases, the sound is below 30HZ, almost no. Ballroom is very strong "low frequency" is about 60-80HZ, Yanhuang first drum, seven drums sound about 40-55HZ between. The lowest bass frequency is 38.4hz, and in all accompaniment, solos, the lowest bass sounds are barely used. Of course, organ, piano, the lowest frequency of 30HZ the following sounds are rarely used. Hugo a sine wave frequency test disc, 25HZ, this frequency most people can not hear the ear. Some enthusiasts said that there was a clear voice, I heard, the presence of all heard! That's right, this is the system frequency multiplier after the nonlinear modulation, 50HZ.
Speakers below 35HZ, negative 3dB low frequency limit, you can better reproduce the low frequency of all recording software. Amplifier, CD player, decoder low-frequency lower limit than the speaker is much lower. In this way, the sound of low-frequency sound to be well reproduced, audio wire low-frequency integrated control force play a decisive role.

Said: Audio cable tuning is subtraction, there is reduction can be added. The basis is that the amplifier should be able to add or subtract, adjust the power margin.

Speakers all good sound, the audio current and voltage ratio, there are more stringent requirements for the system output, the wire combination of the audio current should be reasonable, but also a reasonable attenuation. What less add what, what more what to cut, this is the function of the audio cable and the correct tuning of the truth.
Audio wire two basic functions
Audio cable to have two basic functions, one, there is a true full-frequency audio current balance transmission capacity. Second, there is mutual complement to meet the good sound of the speakers.

The sound of sound is the same as the sound of nature. The energy of low frequency carries is large, and it decreases as the frequency increases. In the amplifier and speaker data with reasonable circumstances, low-frequency sound speakers can have a good reproduction, provided that: the combination of audio wire to have enough low-frequency audio current path, which is the low-frequency control. Low-frequency sound energy, audio wire low-frequency control of the design, production, is a very difficult, but also very important part.

Have mentioned the proposal, the wall with seven lines more than ten square millimeters of copper, multi-strand line frequency curve to be flat, more than ten square millimeters of copper, the energy supply should be plenty, the basis of low-frequency tuning better. Taiwan enthusiasts pay special attention to the true reproduction of low-frequency audio, that the real low-frequency sound reproduction, good basis for the exchange of power, to use twenty square millimeters of copper wire. It makes sense.

Sound system on the speaker low-frequency control of small hours, the speaker has a faint, looming low frequency, then the sound is dim. Low-frequency control increases, the speaker low-frequency sound becomes thick, accounting for a large sound field space, when the low-frequency sound without physical, no texture, no orientation, no direction, sense of hearing seems to be lower than the actual pitch, Feel the low-frequency sound from the bottom of the speaker raging. At this time the sound is false. When the system controls the power of the speaker in the low frequency band, the sound of the thick sound starts to shrink, the density, the physical appearance, the texture, the aftertaste and the accurate space positioning are realized. At this moment, the sound is real. When the system controls the loudspeaker's low frequency band again, the density of the low-frequency sound is increased and the body is further reduced in size. Even the aftershocks receive the sound body. Feel better spatial separation, the sense of hearing seems to be higher frequency. But it does not sound very comfortable. At this moment the sound is tight. Regardless of the sound dim, virtual, real, tight, low frequency sound frequency has not changed, but the subjective sense of hearing. Like the low frequencies, the IF sounds are a bit thick, a bit fat, mouth-shaped, soft, sound-lacking in density, lacking in texture and lacking in texture, without being tuned to the midpoint of the "real" sound. There are many evaluations of IF "thick" and female "Daddy" on this basis.
About equipment collocation
When the equipment with a reasonable sound the correct tuning, is the audio cable to complete. When the amplifier output power is less than the speaker rated power, the sound can be tuned correctly, but also audio cable to complete. At this moment, there are two defects in the audio sound. When the volume is large, the shape of the sound of the low and middle frequencies becomes larger and the sound density becomes smaller. Large dynamic, the sound will have more serious top-cut distortion. Listen with a small volume, full-range sound will perform well. This cut-top distortion, analysis of the characteristics of the power amplifier tube will be very clear.

Summary:
A sound system The key to the correct tuning is the correct combination of audio wire, a full range of audio current balance control.

Second, audio wire and equipment with the ability to put the speaker full-range sound density are adjusted to the "real" midpoint.

Third, adjust the sound, full-band sound sense of hearing evaluation indicators have a good performance. Low-frequency sound of the body, texture, etc. also have good performance, accurate space positioning.

Many audio wire, low-frequency control are owed. Sound wire is not a manufacturer of the problem, but the wire low-frequency design, production, etc. There are difficulties. No wonder there are big fever have made two comments: First, the audio low-frequency sound is not directional. Second, it is recommended enthusiasts to subwoofer sound.