Having my own audio and video room at home was my dream for many years. With the opportunity to decorate the new house and the help of a general manager of the decoration company, Mr. Luo Zong, he finally had the opportunity to realize this dream. Do not talk nonsense, first take a look at the effect of the final completion, to a panoramic view.
As a technology house, you must check out a lot of technical materials and rich "hearing experience" before buying a movie theater. In general, the main technical information that guides me is the guiding on the THX website and the experience of the gods on the AV199. One of these two types of information is theoretical guidance, and the other is actual application and guidance of spending... However, in terms of these literal things, hearing experience is even more important. As a movie lover, I often go to all the major cinemas in the city. Although I feel different, the understanding of cinema equipment is not intuitive, and I cannot provide direct guidance on the purchase of audio and video equipment. At the same time, audiovisual experience is very subjective and has a lot to do with personal tastes. Listening can directly let us find out what kind of sounds and pictures we really need. Before I go to listen, I first delineate the most basic requirements, requiring the system to issue a theater-like loose sound and the sound pressure is high enough, and the dynamics must be rapid. This is what the film should feel. Taking into consideration these requirements, American speakers, especially JBL and Jayce, may be closer to this style of choice. So I went selectively to the city's three high-end audio and video speakers of the two brands, when visiting these three audio-visual room, my request step by step becomes clear and specific. Let's briefly talk about the feelings of listening to these three video rooms.
The first, equipped with JBL array series speakers, Marantz AV before and after the projector does not remember the name.
This set of equipment is very expensive, but after listening to it, I have a clear feeling that the clarity and thickness of the mid-level dialogue is not enough, and the gap between the sound of the main speaker's loose atmosphere is very obvious and it obviously feels disconnected. Waiting for the audio and video room owner to turn on the lights again, I discovered that although it is claimed to use an array of speakers, but the home is obviously not this series of goods, and does not have a similar vertical horn with the main speaker, come back to check it is to know this is the goods .
JBL is very common E series home. Oh, I want to say, boss, do you think we can't hear it? You take this goods with your more than one hundred thousand main speakers. Wouldn't you be afraid that the guests were not satisfied with the overall results? Anyway, I am very dissatisfied with this effect, the center speaker and the main speaker is not a series, many do not say, even the sound size can not match, the tone is not on the same, this is a failure to match. At the same time, the audio and video room is not equipped with a sound-transmissive screen, and the single center is placed at the bottom of the screen, causing the knot image to be clearly biased towards the bottom of the screen. This does not achieve the same effect as the cinema-like sound and picture. So the same series of home + sound screen became one of my requirements for the video room.
The second home, equipped with Jazz RF82 series full set of speakers, Tianlong 4412 combined amplifier, Mitsubishi does not remember the model projector.
Since the RF82 series is significantly lower than the array series, combined with the thrust of the combined machine is not as strong as before and after. The entire system clearly lacks sharp dynamics. The speed of the 12-inch Jay SW112 subwoofer feels okay, that is, the dive and dynamics are obviously inferior to the 15-inch cannon in front of the array. Although the timbre of the full range of horn loudspeakers is relatively uniform, after all, the power of the entire system and the caliber of the speakers are there, and there is indeed no bright spot. The experience of this system is that there is a very big relationship between the power of the system and the overall effect. The caliber of the subwoofer is still as large as possible.
The third home is equipped with JBL series one array series full set of standard configuration audio, Sony 90ES projector.
When the system opened, I was stunned. Isn't that what I want? Accurate positioning, sharp dynamics, unobtrusive bass, rich film quality, oh... After asking the boss price, he was stunned... basically the price of this official USD ×6...
Well, we are a technology house and we cough. So I pretended to be very interested and talked with my boss to get a full understanding of his equipment. From the front to the back, I had a more comprehensive understanding of the cabinet behind the sound behind the curtain to the sofa. The front speakers, the owner used three identical double eight-inch horn main box, not a two-way split tone connection, or the traditional power divider, but the high and low bass connection is very appropriate. Two 18-inch passive cannons were placed in the corners of the front wall, using the horn formed by the walls to enhance the bass effect. The sound-through screen was a screen-woven knitted sound screen in France, and a transparent black cloth was added behind the sound screen to increase the black level. 7.1's four surround speakers are ceiling-mounted in the ceiling, the sound field sounds very natural, surrounded by a good sense, the boss means that the effect is the same on the ceiling and the front of the equipment. The cabinet is placed behind the corner of the wall and does not look like any light-emitting device on the front. It feels the same as the movie theater. It avoids light pollution and facilitates heat dissipation. OK, boss, I learned! !
Of course, the boss also saw that I could not afford the price of this system, so I recommended this one...
I know the boss you have already considered for me, replaced the power amplifier with Integra, but can I say I still can't afford it? So I quietly walked out of the store, according to these several audition experience, began a real planning program.
THX official website standard 7.1 setting method
Next Generation 7.1 Positioning Method
The two fronts are at an angle of 45 degrees with the audience; the center channel is in the center of the sound-transmitting screen; the side is surrounded by 90-110 degrees to the side of the audience, and is 2 feet higher than the ear; the surround back is to be compatible with the next generation 7.1. A 60 degree angle with the audience; the subwoofer is placed in the center of each wall. Well, the preceding points are well understood, and for the surround, it is only specified that the minimum height is 2 feet higher than the ear, and there is no provision for the maximum height. Think about the rows of surrounds on the side walls of a movie theater. At that height, it seems that it is theoretically feasible for me to put ceilings here. The last point, however, is that I have reservations about the subwoofer being placed in the center of the wall. First of all this is not beautiful, and most of the subwoofer instructions say that the subwoofer placed on the corner is conducive to the use of the wall to form a horn to enhance bass. For example, the current specification for the world's only horn subwoofer is that no matter whether it is a few subwoofers, they are all stacked on the same corner to enhance the bass effect and avoid phase problems. Therefore, I still decided to put it in the corner first.
Need to issue a theater-like loose sound Of course, it is best to go to the theater professional speakers, large-caliber horn and bass unit is always enthusiastic pursuit. Look, people's Xidang complete baffle horn and tube amplifier, even surround the sound of the 15-inch ALTEC theater......
This volume ... seems far away from home ... ... we look into
Well, there are businesses selling this goods, JBL screen array 4722 theater professional main box, it seems a lot smaller, the speaker width is only 90cm
However, putting it at home is an effect...
Such a crowded position, I am afraid that even behind the scenes even the basic sound field positioning is chaotic, we still do not play so.
Someone may disdain to say that these professional guys have a rough voice and a poor appearance. Our home theater needs a stylish stuff. To use this to deny professional speakers, then well, then this should be in line with all the requirements of the ... JBL Need for the flagship series, see that row of amplifiers, subwoofers, and 66000 main box ... even Mark No. 53 are all involved... If anyone can install a set of this at home, I also admire the five-spot...
So, if you're getting it right, this kind of room for us is small (in fact, because there is no money ) It is impossible to have such a deep horn speaker (depth 40-50cm) with the depth of the above JBL series or Jayce KL650. Only embedded speakers can be installed in the wall. Well, the front of the best series of 4 suits can be suitable for my house, but the price is not suitable ... It seems that only Jace's older THX U2 series embedded speakers are more suitable, the depth of 10cm is just right Satisfy my needs. And the main speakers and surround speakers are almost the same except for a large angle and a dipole horn. The installation method is also the same. This is the biggest gospel for me as a junior player who has never built a video room. Jayce is also a big brand, and the speaker on THX's official website is the flagship KL650 of the Jayce U2 series.
However, the bass caliber of this speaker is only 8 inches, which is not enough for enthusiasts who like to be puffed up. When installed, it looks like the wall is empty, which is not very sure of the overall effect.
More importantly, the sensitivity of this speaker is only 91 decibels. For its maximum carrying power of 150 watts, the maximum sound pressure at one meter is only 91+10×lg150, which is about 112 decibels or so. With a listening distance of approximately 3.5 meters, the sound pressure of about 3.5 x 3.5/1 = 10 dB is reduced, which means that at a distance of 3.5 meters, a single horn produces a sound pressure of only 102 dB. This is 3dB worse than the 105dB boost of the THX standard, which means that it is just twice the energy... I don't really know how this speaker passes the THX U2 standard. The U2 systems of people are at least such large-scale in-wall boxes, ensuring efficiency and power.
So I had a crazy idea. Can I use two identical main speakers per channel and place them upside down to form a big dumbbell-type speaker and increase the total power. However, I fear that the two speakers will interfere with each other to form a vertical shutter effect, affecting the positioning, and I will find relevant examples on the Internet. At this time, Jess’s official manual once again directed me.
In this large-scale system, several pairs of high-middle-range horns of such main tanks are repeatedly deployed up and down to enhance coverage and power. In addition, this famous pair of large evidence of Dynaudio, this is also the up and down symmetrically placed.
Also includes this, the loudly vocal MK S150 main speaker, is also the vertical arrangement of the three treble, this speaker has a dismantling map, but also three units directly in parallel, the middle did not add any special technology to prevent interference effects. It seems that the influence of interference on this sound is not great and this solution is feasible.
So my overall planning of the audio and video room is as follows (the length of the map was wrong at that time, the actual length is about 4.2 meters)
It can be seen that my screen can fill the entire wall thanks to the sound screen. The screen was maximised. This was the most important point in the cinema, so I took my design and began purchasing equipment.
PurchaseBecause the speaker is to be embedded in the wall installation, in order to tie in with the construction of the decoration team, the first is to buy a speaker, the price of Jayce and the value of a former friend said, the price of the licensed goods is very touching, so I decisively chose the private goods.
Even surrounding a total of 10 speakers, 10 the same box, shocked when it arrived. However, when the speaker arrived, the four walls were all covered with sound-absorbing felt according to the style of the studio, so the installation became a hard battle and the following table.
On the screen this issue, netizens seem to have great differences. Many netizens believe that the curtain acts as a role for the white wall. It is nothing more than a plane that provides diffuse reflection. However, senior fans believe that only the imported sound screen can meet the standard of use. For everyone's most concerned about the Moore problem, my understanding is that if the projector itself is not a particularly high-sharp machine, this problem is completely unnecessary, because you cannot see a clear pixel on the screen. My home-made beauty screen effect is sufficient. Of course, the bigger the screen size, the better. However, due to room width, 120-inch curtains were originally prepared. As a result, it was found that the 120-inch width was 2.83 meters, which was also 2cm narrower than our wall surface. Considering that the 2cm had to be hung on the wall with a hand-held frame, it may cause difficulty in installation. , so spend more than 100 dollars, ordered a non-standard 119-inch screen.
The requirements of the subwoofer were also stated at the beginning, and they should be as large as possible. The large diameters of home guns focus on 15-inch and 18-inch, 21-inch extremely rare and expensive. At the same time, there is also a kind of artillery that is an embedded subwoofer. There are fewer large calibers. Generally, they are only 10 inches and 12 inches. The thickness is still relatively large, the carrying power is also small, and the price is expensive. So it is still the choice of an ordinary external large-caliber gun, but also facilitate the adjustment of the post-position. However, it is also very difficult to choose between 15-inch and 18-inch. It makes sense to choose the same series or more advanced professional guns. However, Jacey's U2 series of 12-inch guns, we generally have some bad mood, and some say bad artillery, and some said that the unit in general, coupled with more expensive prices, I finally gave up the idea of ​​the original gun. At the same time, the artillery factory cannons seem to have great personalities. It is difficult to match them and they are expensive. Finally, he settled for the second and chose the cheapest original gun SW115. This cannon is almost the cheapest 15-inch gun on the market, with a rated power of 400 watts. It can be seen from this point that this is not a high-end gun, but for this price, the big god of AV199 basically thinks that this gun is not obscured. I will try to buy it. It is not worth mentioning. After the arrival, we will test the subwoofer effect in the old home, you can see the volume of the goods and power amplifier contrast, I can only say that the material is not bad!
Due to the fact that the projector has always attached importance to the Dafa brand, and it is recognized that the shooting and the later stages of many movies are now completed by Dafa equipment, the Dafa projector is a necessary and proper belief bonus! ! Just 40 years old new 40ES projector is recommended by many websites, its effect is enough for PK to drop any entry-level projector, and the price of the country is not outrageous, after determining the projection distance just to meet their own audio and video room, all right Buy it!
Power amplifier selection, the United States and Europe are high-end products, of course, we are longing for, but the price is too high ... and low-end products are often not as good as the price of the same product, so I still aim at the Japanese. Japanese Dragon, Onkyo, Pioneer, Marantz, Yamaha, Sony, should be the current AV industry more active brand. Specifically to the Jazz speaker, due to the horn unit, the treble is already fierce. At the same time, it is an embedded closed box. The mid-bass (THX certification box, the low frequency is only marked to 80Hz) is also not full enough risk. In addition, the front unit 2 is only connected in parallel to form one channel, and the impedance of 8 ohms is reduced to 4 ohms, and the current reserve of the power amplifier is relatively high. So I chose the Onkyo amplifier with relatively soft sound and relatively large reserve current. At present, Onkyo has upgraded its panoramic sound and its model has been changed to "3". From the high-end merger machines 5030, 3030 to the mid-end 838, etc., basically all the conventional upgrades of the previous model, and there is no major breakthrough. I still set out on the principle of cost-effectiveness. At this stage, due to the film source problem, the demand for panoramic sound is not strong. The availability of amplifiers with more than 8 channels is not high, and the difference between 3030 and 838 is several thousand. After buying high power to make up for the lack of power. So the 838 with pre-output is the most cost-effective choice. The price of Jingdong is still too high. In contrast, Ma Yunjia’s price performance is much higher.
After that is the source. In the age of the Internet, it is important that reliable HD players play HD 1080p resources. Here is to talk about the price, did not buy too high-end brand, bought a Haimeidi Q5 as the main high-definition player. Blu-ray machines are also among the cheapest Philips 3D Blu-ray players. I always think that the level of Blu-ray machine oppo is certainly stronger than this kind of machine without entry, but the difference is more than enough to buy a lot of Blu-ray discs and hard drives. HDMI output to the power amplifier, 24P screen through to the projector, logically speaking, not as high as the previous simulation of the front-end requirements, so this will be the first to do, anyway, change later is very convenient.
The total cost of wire rods in this system is 1,000 yuan, which is almost the price of ordinary wires. Because before the seller selling the JBL Acura series also said that this is not HIFI, there is no problem of too much taste, his own audio and video room equipment that is used in the ordinary speaker cable, and not to the sky price that This is the point, so I will follow suit. The price will be the same.
The cabinet was the last thing to buy. At first I wanted to buy that kind of ordinary wooden shelf. I later discovered that it was possible to add a post-class, or to imitate the JBL Acura series audio-visual room. I also bought a black cabinet, letting The equipment is safe and good, this thing should not affect the effect, so in the case of the same thickness of steel or to buy cheaper ... ...
After I designed the audio-visual room program, Luo began to lay out the attracting and diffusing materials according to the standards of the studio. After my 10 in-wall speakers arrived, the walls were actually finished. And actually did not leave any wooden box like me to install into the wall speaker ... ... see people install more professional, suddenly feel that he is an inexperienced white ... ...
Fortunately, Luo always thought of a way to use a cutting machine to cut the sound-absorbing panels out of the speaker-sized squares, revealing the cement walls behind them, and then using the wooden bars to make the sound-absorbing frame of the speakers, so that the front six speakers So installed it.
The four surround speakers are almost 10kg each. Luo always reinforces the ceiling and puts the four speakers in place. The projector bracket was later arrived, cut the ceiling again, and directly fixed directly to the ceiling ... Here you can see the projector's power cord lengthened directly into the cabinet and will not leave unsightly plugs at the ceiling.
The most difficult is the installation of sound-through screens. Originally, the area of ​​the audio-visual room was small. This side of the curtain was down, and the place where the tube was worn was very small.
This layer of white cloth is through the sound screen, the tension is abnormal, the two people waste a great deal of strength to put all those deduction points up, really afraid of too much tension, through the sound screen directly torn ...
This black cloth is a black sound-enhanced curtain that adds black space. However, Meishi actually does not provide any accessories and instructions for installation. It completely calls us to explore. At first, I used transparent plastic and then used 3M double-sided tape until the video room was completed for 4 months. This layer of cloth still slammed down from the back until one day when I thought about the stapler. With a stapler, set the black cloth on the sound screen so that it never falls. If you have friends who have assembled their own sound screens, we strongly recommend that you use a stapler to handle the black cloth.
How to hang the sound-permeable screen on the wall has become a problem. The facts prove once again that we have no experience. No way, we can only cut the sound-absorbing cotton again, use a lot of wood nails to the cement wall, and out of the speaker plane, so that the screen hanging rack is finally installed. The details of the installation diagram will be helpful for the friend who will install the sound screen in the future.
The following figure shows the installed screen hanger.
In the laying of wire rods, due to the fact that it has been designed as a dedicated audio-visual room and the speakers have been put into the wall, it is unlikely that they will be replaced in the future. Therefore, the speaker wires are not connected to the wall-mounted copper row sockets, but are directly connected to the bare wires to connect the speakers and amplifiers. . This reduces the number of joints, which is helpful for sound quality. In addition, two RCA shots and two speaker cables were placed in the front corner to allow for the upgrade of dual and even passive guns. The entire audio and video room plug has a separate circuit and accesses the dedicated air switch in the distribution box.
Finally, hanging black velvet background cloth behind the screen, covering the screen to the wall of the ground, and then after the excess subwoofer line to the black cloth, the entire audio and video room is integrated.
Originally, the installation ended here. As a result, at the time of auditioning, it was found that at loud volume, the entire front sound field became tense, and the dynamics were not enough, even a little broken, and the amplifier was very hot. Taking into account the 838 amp nominal 215 watts per channel power, in actual use, it may also 1/3 of the actual output, that is, 70 watts. 70 watts of power It would be difficult to feed two THX U2 speakers. In other words, one of the important equipments in the installation process is the post-amplifier. Seeing that the imported brand's high-power amplifiers are so expensive, they originally wanted three domestically produced Lao Qin amplifiers to deal with pushing the first three channels. Suddenly think of many AV199's friends are their own home theater speakers, then they are what equipment to feed these big guys? Sure enough, they are also using professional amplifiers to push professional speakers.
So technical men began to make up for the relevant knowledge, that professional amplifier inside, the theater with more brands is crown, peak, QSC these three brands. Wait, are you talking about the crown that is HARMAN's and that JBL is a brother's crown? Sure enough, HARMAN really gathered all players in the audio field. The power amplifier authority Crown is not only a member of HARMAN, but also has a dedicated amplifier for the cinema with JBL professional speakers. Let's take a look at this panel with the JBL logo on it. Since it is a dedicated amplifier for the theater, his voice should be the most authentic movie theater.
And in the specification, the frequency division parameters and EQ parameters of these theater speakers have been preset.
And can be connected to the computer, free to change the EQ parameters, that is, bought this stage, but also free to send a parametric EQ, it is cost-effective ah. To know that the spirit of the JBL series is EQ, we started with this built-in EQ is also very good.
This cargo is extremely large, DSI is the serial number, 4000 refers to the rated power 4000W of the whole machine at 8 euros, you have no mistake, is the rated power at 8 o'clock. This is more than the total maximum power consumption 720W than the Angam 838, ah, not to mention people or rated power ... Read the entire series of manuals and found that the 1000 type can be very good to meet my mono 4 euro 300 watts Demand, and people are real rated power. However, this product also has two prominent disadvantages: 1, the price is expensive; audio input panel is actually such a professional pin input, which can call me how to use......
At this time, I discovered the XTI series. From the point of view of various parameters, this product is simply a DSI puller. Although there is no mention of the model used for the movie theater, even the USB connection is a tune. And the price of this XTI is simply a bargain, and it's not much more expensive than the domestically produced old Qin. As shown in the figure, the standard XLR input and output terminals are provided on the back.
Also in the cost and the ability of this machine to consider, from the regular agent bought two back, one work in stereo, respectively, to push the left and right channels; another work in the Y input mode, only push the center two speakers.
Well, to this end, the installation is over and take a look at the final results.
The cabinet, and the front of the good brother, millet air purifier.
Look at the cabinet
Speaker connection from the corner
Open the cabinet, messy mess, I don't want to look at it anyway...
Ceiling mounted surround speakers, because the dust cover is difficult to install at this angle, inconvenient, it is simply not loaded. The main speaker at the back of the screen is because there are two layers of curtains, and it is feared that the treble attenuation is too severe and no dust cover is installed. Anyway, such a large screen is itself a dust cover.
Dafa projector is really big
Well ready to boot. In order to prevent people from mishandling the power supply at home, a power timing device is specially configured (DBX Replica, original DBX is also owned by HARMAN, and the price is close to 2000... ), In order to achieve the order boot and reverse shutdown, Dad will no longer have to worry about not remember the order of the switch. When the red light of the power sequencer lights up, it is also when the B cell starts to increase. Do these eight brightly lit LED lights look professional?
From the bottom up, there are two post amplifiers. Note that the top one is a Y connection, so the right channel's level is turned off.
Onkyo 838 amplifier. The appearance of this cargo is the same as that of the top 5030. The 20-centimeter-high stalwart body can hold people.
3 are not upscale sources. Above is the cabinet to send PDU, garbage material, reluctant to use it when large size plug.
This is standing behind the sofa and watching the entire video room
The placement of the four surround speakers is calculated to meet the THX standard placement method.
A coffee table for snacks and remote controls, as well as discs.
Just take a few screen shots
When the final stage is sounded, the overall effect of the video room is satisfactory. Whether it is a dynamic shooting game or a classical concert, it can be performed with ease. It's not an exaggeration to say that I don't think it's worse than the one array of the best series (it may be that I've been busy for so long, I have some emotional attachments, my brains may be a bit big, and I'm happy anyway). In the dynamic part of the clip, the sound pressure of the iphone is used to detect the sound pressure. The ear does not feel tired when the sound pressure in the viewing and listening position reaches 108 dB, and the input level of the rear display is -10 dB. Class amplifiers also have 10 dB of power headroom. One of my most worried about the bass texture, but also because my sofa is not placed against the wall, and to solve the problem of low price subwoofer turbidity quite a lot. As the video room uses a special blackout curtain, the excellent color of the Dafa projector is also reflected. What's slightly regrettable is that the walls and ceilings of the entire audio-visual room are lighter in color, and they easily reflect the light on the screen, affecting the visual appreciation. If you pay attention to the collocation color, you can achieve the environment of the Jazz official picture, then the viewing experience. Can be even higher!
After reading this set, everyone will certainly be gearing up and eager to try, but also invited by the small series, let me introduce the price of the full system with everyone. Then I started firing it here. I am not a local tyrant, so my price will not make everyone feel uncomfortable. I am not a "soil": I'm still highly educated, I know foreign languages, I know I'm searching for relevant information and I'm sure I'm not going to be pitted; I'm not "honorable" too: Everybody can see that I'm buying things that are all about cost Only to start, money is saving. I believe the above two points apply to most value-friends.
As I said before, the price of this box in Jesse's box is very touching. I went to the local dealer and asked if the minimum price of the Bank of China is about 5,700. I want 10, which is 57,000! ! Taking into account that as long as it is a genuine speaker, the life span will be very long and there is no warranty concern. Later decisively importing into parallel imports, it was almost the price of 1/2 of the country's Bank, and it was less than 3,000! After that, there are other electronic devices. All of them belong to the state bank. In other words, my entire set of equipment is the State Bank in addition to embedded speakers. The price details are as follows:
10 7800 Embedded Speakers: 30000
119-inch sound-through screen: 3300
Jie Shi SW115 subwoofer: 4950
Sony 40ES projector: 12000 (including two 3D glasses)
Onkyo 838 integrated amplifier: 6600
Crown XTI1000 rear power amplifier: 3050×2
Source, HD Player + Blu-ray Disc + HDD: About 2000
All wires: 1000
Power Sequencer: 200
1.2 meters cabinet: 460
Projector hanger: 75
Mobile coffee table: 200
Functional sofa: 3000
how about it? After reading the quotation above, do you all want to come by yourself? However, there is one point to be explained: if there is no acoustic decoration, the system will be discounted in such a small space. However, the price of acoustic decoration is also not clear to me. It is all kind to Mr. Luo to help me for free.
Experience/suggestions
1. If you have conditions, the video room must consider the picture frame through the sound screen program, he can not only make your center speaker placed in the middle of the screen more accurate positioning, but also can make your front and rear of the audio room is very clean, very There is a cinema feel. If the subwoofer also chooses to get into the wall, it would be better.
2. The acoustic treatment needs to be done, but I didn't worry about it. It was totally lost to my friends and the results were fairly satisfactory. In addition, the sofa does not rely on the final wall swing, which in itself is an optimization of the sound.
3. The size of the screen must be as large as possible. At this time, the advantages of the sound-permeable screen also come out. It is not necessary to consider blocking the position of the front speakers. My video room is 3.25 meters from the screen to the audience. The width of the 119-inch screen is about 2.8 meters. We can calculate the arctan (1.4/3.25), which is about 23 degrees. It is multiplied by twice the angle, which is exactly The THX standard specifies an angle of 45 degrees. At the same time, my speakers are almost mounted on the edge of the screen. There are also angles of more than 40 degrees to meet the THX standard. However, it is worth noting that many standard focal length projectors at the distance of 3.25 meters are less than 120-inch, so there is only one way to put the projector back. My audio-visual room is about 4.2 meters in length, and it deducts the 60-centimeter depth of Sony's machine. It is almost just full of 119-inch screens at the widest angle. Fortunately, this Sony machine's deformation at the most wide-angle end is also very small, and the most wide-angle end is theoretically the maximum lens aperture, so the screen will look brighter.
4. The equipment into the wall must be bought better, because once loaded, the later replacement is more troublesome, once in place is not only a money-saving approach, but also a lot less toss, people can watch the movie with peace of mind .
5. The total power of the system must be in place. It can be seen from this system that the 105 dB standard of the THX standard is in the standard state, and it is difficult to achieve the standard under the audio and video room environment that is not large. Therefore, this system uses double the front speaker configuration outside the increased power professional post-class promotion, in order to achieve the final effect of over 105 decibels.
6. If it is a private audio room, shading will be better, and the projector does not have to worry about brightness. In actual use, I put the 40ES light bulb in an energy-saving position. According to the evaluation report, the peak brightness of the gear is only 900 lumens, but it does not feel dim. Even if the wall is relatively shallow, I will feel some. Reflective. Of course, if you look at 3D, the projector automatically lights up the bulb with maximum brightness, which is 1700 lumens, and the actual feeling is much stronger than the dim 3D effects of many movie theaters.
6. The screen does not need to be blindly installed, because once Wallace sofa is used, most of the time you will choose to lie down to enjoy the movie. Because of this, people's eyes are facing upward, and the relatively high screen Make people feel relaxed. Anyway, there is a 15 degree angle from the middle of the screen to the viewer.
7. If it is not high-end equipment, the cabinet is best lost in the back corner. When each device is running, there will be light and display light, which will seriously circumvent the viewing experience. For example, there are lights of various colors on this set of equipment. I can't stand it. Similarly, no cinema will Place any glowing things at the bottom of the screen...
8. Replaceable equipment, including power amplifiers and audio sources, can be replaced and developed rapidly. For a video room with a cabinet, this is not a problem. Buy a new one directly, so you don't have to think about outdated or insufficient performance. Of course, the amplifier still tries to buy new functions and interfaces. At least it must have a front output port.
9. There are many equipments in the audio and video room, and the decoration is complicated. Especially when the screen is placed well, there will be great smell. In order to ensure the health of the movie, it is necessary to buy an air purifier to filter out harmful gases. The comrades can consider creating a new air system for the video room alone, because you can't open the window when you are watching movies. At this time, the fresh air system will work. (I'm still sorry why I didn't install a fresh air to the video room)
10. Rational consumption, for the silly black and thick equipment of the cinema, it is not as exquisite as the HIFI system, the general connection, the ordinary power supply, the amplifier and the speaker that can meet the standard can absolutely produce the cinema effect. You see, people's cinema amplifiers and speakers are not astronomical, the power is more likely to be drawn directly from the power plant, but the effect is still so shocking. So, Oh, you know.
11. The last step is to pay close attention to Zhang Aunt. Your audio and video room is built. The software problem becomes the biggest problem. Aunt Zhang will occasionally have various information on Blu-ray discs and hard disks. My Blu-ray discs and 4T hard disks are all bought by Zhang Aunt when they are recommended. They are much cheaper than normal prices.
Finally, I sincerely thank you for supporting my family, thank you Mr. Luo for providing acoustic decoration to the audio-visual room, and thank you for the assistance of the Master in the audio-visual room installation. Thank you for watching this post, welcome to discuss, thank you!
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