miercuri, 13 august 2014

Home theater experts give tips on how to buy and install appliance

When buying a flat screen TV, it is common to also invest in a sound system "film" to take home. The home theater consisting of boxes of different sizes, have to be chosen according to the environment in which it will be installed and positioned correctly. Otherwise end up doing only "noise", experts say, instead of creating an enjoyable listening experience.

Besides, with TVs getting thinner, the small size of its frame ends up limiting the capacity of the built-in audio system in them. A home theater just supplying this "deficiency" with multiple boxes and external to the TV sound.

Here are tips from the experts consulted by UOL technology to avoid mistakes in the purchase and installation of equipment:

Begin by setting

Before choosing the type of home theater, you need to assess the size and restrictions that may have the environment where it will be installed. A very small room, for example, can not involve the installation of several separate boxes, and do not need a lot of powerful devices. Already a large room, by contrast, requires a system with more boxes, capable of reproducing sounds with greater intensity and more nuanced.

  "The sound has to fill the room. But one must take into consideration that there are obstacles against him as sofas, cushions, curtains, shelving. All this influences the choice of home theater.

 
Also, the home theater change the decor of the room. Some have wires that will become apparent if the room is not designed for them to be passed inside the wall or floor. In other cases, the speakers need to be embedded in the ceiling.

  What are the options of home theater
After analyzing the environment in which the home theater will be installed, the consumer can choose the types of devices available on the market.

It is common to find devices for sale that comes only with DVD player or Blu-ray Disc / DVD player. If the person wants a system that reproduces images and high-definition sound, so the best option is the Blu-ray. "The Blu-ray discs can store more information than the DVD. Besides the high-definition image, it records more sound channels.

Then he can choose between three types of home theater:

- Soundbar: is a single unit in bar format that should be positioned below the TV. It "simulates" the sound that would be produced by five speakers and the subwoofer (channel bass sounds). In general, it is suitable for small environments, being compact and waive the installation of additional boxes.

- System 5.1 / 5.2: composed of five boxes (specified by the number five) and the subwoofer (specified by the number one or two), also called a module. Each box reproduces a sound channel: two front (for voice), a central (to the track) and two rear (responsible for the surround sound effect that passes impression of motion). The boxes can be the satellite type (minor, they can be supported) and towers (long, get straight on the floor).

- System 7.1 / 7.2: beyond the five cases described in the previous system, it has two rear. Nominated for "audiophiles" and installation in large environments, the system with additional boxes reproduces nuances of sound.

Follow (or not) the brand of TV
According Altheman, Fnac, by opting for home theater equipment from the same brand of TV is not a rule. But in general, he says, the same equipment manufacturer may have some gain in communication between the TV and the audio system.

Another advantage is cosmetic, pointing Traldi, Samsung, since the design of the devices of the same brand is complementary.

In the case of home theaters 7.1 / 7.2, however, is not always possible to combine the TV system - many of these are manufactured by companies outside the video market.

Do not overdo the sound power
It is common to summarize some consumers choosing a home theater amplifier to power the speakers. This is wrong, because this feature does not reflect the overall sound quality, but the "high" how it can get. The value is expressed in watts (W) and, in general, is accompanied by the acronym RMS (Root Mean Square), which indicates that this is the average of the amplified power.


  In their eagerness to "fall off the couch" with the power of sound home theater, people can end up creating a noisy environment - bothering the neighborhood and even causing damage to the ears. In Brazil, consumers often want a more 'powerful' sound, but if he has a small room, this is unnecessary.

Moreover, leaving aside the quality due to the lower price can be "shot in the foot." "If one invests in a system with higher quality, less need to increase the volume, for example, to have the same sound pressure than a lower unit. Hence it generates less noise and noise pollution in the environment.


  correctly install
Most installations of home theater systems 5.1 occurs in small environments, in rooms that are converted to family room.

By positioning the boxes, it is important that these pairs are positioned symmetrically with respect to the viewer and sitting, not the TV. "The boxes should be relatively at ear height. If this is not possible, it is best that they are higher than the viewer, so the sound is not played at the ground.

  At the front, near the TV, are the central boxes left, right and front. "If one of the boxes get out of voice that central axis, the user watching a movie, for example, will see his mouth moving and the sound to come out the other side.

Already the subwoofer should stay on the ground, head-if possible, and never backed furniture, experts emphasize. How is responsible for bass, it can end up making the mobile where is "shake" to reverberate the sound.


  Behind lie the boxes surround a semicircle, giving impression of movement to the sound of the scenes views. "When a car passes in the video from left to right, the sound of it comes out of the box from left to right as well, behind the viewer," says Altheman. So if they are not symmetrically positioned, will not create this sense of involvement in the scene.

In small rooms where space behind the spectator is not enough to hold the boxes, the most common solution is to install them in the ceiling.

The rear speakers tend to be more apparent in the environment and to not disrupt the aesthetics of the site, some manufacturers now offer wireless surround speakers.

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