Give yourself a small goal: grass and weeding about home audio and video equipment

The book follows the above (after three years #)

Pooh's Do not burn video and audio tour articles: sun drying the study and the desktop is not burning, that is, this set does not intend to continue to upgrade the DAC, two rooms, turntable, amplifier. . . Doing more will only add to the study Although Libra does not have obsessive-compulsive disorder, but still like the clean work / game environment In short, the desktop system is finalized, sufficient enough () Pooh sauce debut ↓ ✪ ✪ ✪ ω ✪ ✪ ✪ ✪ ✪ ✪ happy New Year! --------------------------------------- Likes 716 Comments 406 Favorites 2kView details

Due to the commercial purpose of the current market, the concept of audio-visual equipment has been continuously confused, and even mobile phones and televisions dare to call themselves HIFI.

Even multimedia, Bluetooth speakers have to add a certain certification to appear tall

Therefore, I think it is necessary to emphasize this point. Traditionally, HIFI and AV are separated.

From the most basic acoustic environment, the requirements of HIFI and AV are different

However, due to the fact that the matter was so old and difficult to live, the fans I’ve seen were still based on the living room party.

Therefore, the core goal of the individual is to achieve the harmony and harmonization as much as possible on the basis of building a cinema.

Of course, we have conditions to prepare two rooms:

An AV theater (movie, game), a HIFI listening room (conference tea)

However, the premise is more! many! earn! money! I wish you all a fortune for the new year and a lot of good luck!

The opinions in this article are very rich in personalities. If you have different opinions, please feel free to take a look at the bricks.

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First, planning

After graduating, he was ready to purchase a new house. Eventually he chose a house with a top floor and a loft and a garden. He stayed downstairs and stayed at home. There was a video room in the upstairs, drinking tea, cats, and flowers. The only regret was that there was no disturbance to the living room party. That is, the attic belongs to the top of an irregular triangle slope. In the future, it will have a negative impact on acoustics.

1.1 Environment

The room is about 5.4m*4.5m. When it was renovated, as Xiaobai, my first consideration was sound absorption to avoid disturbing the people.

In fact, this is a big mistake. There is no distinction between sound insulation and sound absorption:

In short, it is sound insulation that can avoid disturbances and sound absorption can avoid indoor echo. Don't be confused! Very important! ! !

Due to the eagerness to decorate, the design fees of the audio-visual room are high, and due to the schedule and cost, they do not have time to select materials. . Saying good brown finally made his father like this. . In short, it is the product of various compromises. .

What kind of ghost aunt ah!

Because the map is cheap. . Whole house whole floor sound-absorbing board bought locally

In the end, I can only go for Chinese-style remedies that I don't like. . .

Putting aside color and acoustic problems, this plywood room is filled with instant gas chambers.

Is this trying to kill my own son?

Solution...

Fresh air system + purifier, 24 hours boot, thanks to his own environmental engineering company, fresh air to get:

Panasonic 15pma model, the most classic PM2.5 HEPA model, roughly calculated ventilation conditions:

Air volume 150*2 ÷ (25 square * 3m height) = 300/75 = room ventilation 4 times/hour

This ventilation efficiency is of medium level, but summer plus window and downstairs positive pressure system

Theoretically, it can meet the need of ventilation

Because the loft is not easy to install new air, from the picture point of view, the air supply and return air outlet are in a straight line, but the actual air outlet is used as the guide, and the actual effect will not be too bad.

1.2 Selection of Acoustic Panels

In principle, it should be based on diffusion, supplemented by sound absorption.

Note that the sound processing here is only for the 125~8KHz frequency band

Too low materials can't be achieved, too high human ears can't recognize, and few instruments can reach

According to laboratory standards such as thx and Dolby, full frequency reverberation time should be 0.3-0.4s

In theory, the ideal sound-absorbing material only needs to be arranged in 20~30% of the total area of ​​the house to achieve

But taking into account the actual diffusion of sound, in particular, the superposition of audio frequencies below 80 Hz at the corner of the wall will produce diffraction-induced standing waves.

Therefore, sound-absorbing structures should be surrounded at the corners (low-frequency traps)

I am lazy and use the diffuser board as a trap

Effective, but not good enough! Phase II decoration to be improved

The number of diffusers I use is as follows:

Curved *10 Pyramid*2 Skull*1 Foam*6 Sound Absorption Board*2 Porous Acoustic Panel*ALL

That's right, there is less proliferation and too much absorption!

In the later period, the porous sound-absorbing panels will be dismantled in large areas and replaced with various types of diffusers.

In theory, it will be more full and resistant to hearing

Look at the picture to speak:

AV frequency response curve: There are obvious standing waves at 35Hz and 78Hz. It is very difficult to depress 12db at such a low frequency, but theoretically it is possible to use the subwoofer's own EQ pressure, or an external gun tube forces the curve flat.

AV reverberation curve: The problem is large. Due to the use of a single type of sound-absorbing panel over a large area, 500-2000Hz (main vocal main frequency) is over-absorbed. No reverberation means that the sound is dry, there is no saliva, and other frequency bands It is also difficult to see!

Hifi figure will not let go, but also miserable haha

1.3 Cabling

Since it is based on the AV system, it is mainly embedded in speaker cables (speaker cables).

First of all, to put it plainly, speaker cables are wires. One end connected to the amplifier, one end of the speaker line, transmitting the power signal. From the sound point of view, it is not recommended to purchase wires that are too cheap. Considering the process is not closed, the oxygen content of the wire is too high and the density is not uniform, which can lead to sound thin, sharp and easy to oxidize. On the other hand, if it is not high-end equipment, too expensive lines are not very necessary. Based on pragmatic principles, the recommended brands are Akihabara, Kaya and others. Choose a line of 8-20 RMB/meter. Since the manufacturing threshold is low and there are many fake lines on the market, we must pay attention to the resolution.

In addition, in addition to two shares, the speaker line also has four shares, it is highly recommended! reason:

The new Dolby Panasonic Atoms and DTS:X standards are beginning to gain popularity because traditional third-generation audio tracks are no longer sufficient for humans.

In order to better restore the sound field, the number of horns has risen from the original 5.1, 7.1 to 7.1.4, even 9.4.6

The high-end pre-class has supported 64 speakers and feels the following:

Therefore, the significance of the four-strand line is that it is more convenient to upgrade in the future, and it is possible to divide the four shares into two pairs of two lines directly from the original trunking.

Double the number of existing speakers without destroying the decoration and re-wiring

What’s more, the line of four shares is not much more expensive than the two lines of the same class, so take preventive measures and highly recommend it.

When I buried 7.1 lines with four shares, there was no pressure to upgrade 7.1.4 (although there were some open lines)

Canomei speaker cable | Taobao search s.taobao.com direct link

1.4 Power and Power Cables

With regard to the power cord, the speaker is originally a niche, and most of the top brands are European and American brands, thus forming a concentration of industrialization.

Can be understood as an international standard, so it is easier for American Standard power cord to buy products suitable for its own equipment.

The national standard line is mostly produced by Huaqiang North. . . Whether it is technological maturity or the options are too narrow

Therefore, the wall is plugged or the wire is selected as much as possible.

So isn't the good power cord expensive?

Not necessarily! Remember, the sound is objective, but people are subjective

No good or bad, just like it or not.

So, don't argue about whether the wire is useful or not?

Dozens of machine lines are entirely possible to kill a few million top line, just depending on whether you like it or not.

So, the advice I gave was that, in practice, there is less Gatlin~

Find the most suitable one, according to the equipment with different prices of wire

The value of the wire, strip and panel in the above picture has been 5w+

(Kama and Yin Cai are borrowed)

The reason why wires and currents are demonized is because most people are self-righteous starting from "science."

However, the transmission of current and its principle remain at the stage of discussion.

Take an example of a linear power supply:

Look at the concept first:

In fact, it is easy to understand, in contrast, the traditional switching power supply power transistor works in the switching state, so the transistor power consumption is small, the conversion efficiency is high, generally 60 to 70%, while the linear power supply is only 30 to 40%. This is why almost all electrical appliances use switching power supplies (ie, built-in or external so-called transformers).

The switching power supply to the current degradation, we see the picture:

Obviously not a level of distortion

According to old friends, the voice of the horn is the product of the expansion of analog signals.

The analog signal comes from the decomposition of the digital signal (here specifically PC, CD, digital broadcast, LP does not contain analog signal source)

The distortion of each device, superimposed to the end, will cause great differences in sound quality

The current will play a decisive role in the distortion (another factor that is often overlooked is the suspension)

This is why Laoge says playing the speakers is the end of playing electricity.

I guess there will still be many wind, fire, nuclear, and water theories put forward by the Great God followers (///ω///)

I do not intend to reverse the case here, but I suggest rational thinking, rooted, not to be confused

Putting other wires aside, simply speaking about personal understanding of HDMI

It is worth mentioning that, do not know why, do less domestic HDMI evaluation

In the "Microcomputer" in 2010 has done a large evaluation (link)

Abandon the era of the hdmi version of the low-end 1.4

From the 1.8m and 2m lengths of wire, 55-inch television, subjective evaluation and other words can be seen that the evaluation is not actually rigorous

Fair evaluation recommends using the mainstream length of more than 8m, more than 150 inches, manual exposure comparison with the frame

Unfortunately, in recent years there has been no more detailed evaluation

â–¼Please note: HDMI has two demarcation points, 8m and 15m exceed these two lengths, the corresponding production process will be different

Here is the concept of an AWG:

Therefore, in order to ensure signal transmission, please try to purchase 24AWG or 22AWG HDMI

As for the flat line or the round line, the impact is not great

I use Gordon still V6000s

American Golden Sound/Gao Dengshang V6000S hdmi 2.0 HD line 4K single crystal silver plated line 1216 yuan Lynx featured direct link

Other wire rods are similar, but if they are sorted by the effect of wire investment, then individuals think that it should be:

Power Cable> Signal Cable> Speaker Cable> HDMI

1.5 Cabling

The author is av and hifi separately

Av on the left hand side, all wire wall

Hifi equipment on the front, all open lines

Therefore, when switching the system, it is necessary to manually unplug the speaker cable of the av system and replace the wire of the hifi system.

â–¼ This arrangement is due to several considerations:

All equipment is placed in front of a chaos and several cabinets must be set up;

Many devices have lights that interfere with the viewing experience;

Too much equipment can easily cover the curtain;

HIFI and AV are completely separated and do not interfere with each other (after 247, we do a full-time av, hifi chooses a pair of boxes, which is a hindsight)

The disadvantage is that it is more troublesome to change the line when switching the system. .

If you want to achieve no line changeover, you can use a signal line to solve (I have no wall, do not want to take the line):

Av merges the analog output to the hifi amplifier to push the main box (because the distance exceeds 5m, 1 pair of balance lines are needed)

When listening to music, cd directly output signal to hifi merge

When you switch the system, you only need to press the input switch key on the hifi combination (zax120 supports 6 sets of analog input)

2, build

Because the level (financial qqq) is limited, the idea of ​​collocation is of course within a limited budget, as far as possible to take into account the cinema and music.

2.1 Three big parts (speaker, amplifier, audio source)

The three big parts will get their heads first and the back will be easier to handle.

In particular, it is recommended that the main box be set before the first burning, and then consider other collocations

Even taking a step back, taking me as an example, when I started with only 30,000

I will not buy the so-called 7.1 kit (this range contains Jazz reference, Jamo 5 Series and other popular collocation)

But look at the higher level, go and buy a pair of HIFI boxes that are as good as possible to set the main tone for the full set!

The problem that money can solve is not a problem. In the words of our securities industry, it is called time for space:)

2.1.1 Speaker

An excellent home theater performance standard includes the ability to reproduce clear dialogue, accurate sound localization, full spatial surround sound, smooth panning movement, balanced sound, wide dynamic range, and the speakers seem to disappear completely. The seats have a good effect.

Putting aside these abstract phrases, personal understanding is: fast, deep dive, high frequency, and easy to promote.

Substituting these features into the HIFI speakers, within the class of 20,000 yuan, I finally locked up the German ELAC.

In the picture is due to the summer penthouse is too hot, the picture taken when moving the box to the living room, ELAC's 240 series is the most prominent feature of partial monitoring, and the same level of the box, such as the Tanner profile, Jinlang 948, Dani's IKON6 In contrast, the ELAC240's feelings are not strong, just like the white knight, faithfully restoring the sentimental voice, unlike the dense warmth of Danner, and not as daring and daring as Dani, it is 4 Euro, the parameter of 89db is relatively Easy to drive, 15W amplifier is enough to push the wind. However, the price to pay is the large dynamics, metal clip cone unit is not easy to control, the higher the power amplifier requirements.

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