Recent Technologies Make Installing Home Theater Kits A Snap
The procedure of installing multi-channel audio speakers in home theater systems is quite tedious and manufacturers have invented new products and technologies including wireless surround sound speakers or surround sound wireless headphones recently to help simplify the setup. I will look at a few of the newest technologies which were designed to make setting up home theater systems a snap. I will suggests what to look out for when making your buying decision.
While in the past setting up a TV has been rather easy, the emergence of multi-channel audio has made setting up home theater systems much more difficult by requiring a number of external speakers to create surround sound. In case of 5.1 surround, 6 speakers are utilized: center, left and right front, left and right rear and a subwoofer. More recent 7.1 systems require a total number of 8 speakers by adding 2 additional side speakers.
Consequently the installation of home theater kits has turn out to be a fairly complex process. Many houses are not pre-wired for surround sound. Moreover, long speaker wires are often unattractive. Manufacturers have recently introduced new devices and technologies. These products were developed to help simplify the setup of home theater kits.
One approach is minimizing the number of speakers by making virtual speakers. This technique applies signal processing to the audio and adds phase shifts and cues to the sound that would ordinarily be broadcast through the remote loudspeaker. Because the signal processing is based on how the human hearing detects the origin of audio, the audio components which underwent signal processing can be mixed with the front speaker components and broadcast by the front loudspeakers. Because of the signal processing, the viewer is tricked into believing the sound is originating from virtual remote surround loudspeakers.
The benefit of this technology is that only a couple of speakers are required and no long speaker wire has to be run all through the viewing environment. The downside however is that each person will process audio differently due to the dissimilar form of every human ear. Since the signal processing is based on a standard human ear model, virtual surround will not work equally well for everybody dependant upon how much the viewer varies from the standard model.
A different option for eliminating long speaker cable runs is to utilize wireless surround sound devices or wireless speakers. A wireless kit consists of a transmitter and one or a number of wireless amplifiers. The transmitter connects to the source. The wireless amplifiers connect to the remote speakers. This transmitter will generally have line-level and also amplified loudspeaker inputs. Ideally it should come with a volume control to adjust it to the audio source.
Whereas a few wireless speaker devices come with a wireless amplifier that connects to two speakers, other devices offer separate wireless amplifiers for each speaker. The most basic wireless kits use FM transmission. FM transmission is susceptible to noise and audio distortion. More sophisticated systems utilize digital audio transmission to completely preserve the original audio. Ensure that you choose a wireless system with a low audio latency, at most several milliseconds. This will make certain that the audio from all loudspeakers, including the non-wireless speakers, is in sync. Low latency is also important for good sync with the video. Otherwise there will be a noticeable echo kind result. A number of wireless devices work at 5.8 GHz which offers the benefit of less competition from other wireless products than devices employing the crowded 900 MHz or 2.4 GHz frequency band.
Another approach are side-reflecting loudspeakers. These products are also named sound bars. There are extra loudspeakers located at the front which broadcast the sound for the remote speakers from the front at an angle. The audio is then reflected by walls and appears to be originating from besides or behind the viewer. The result heavily depends on the interior, particularly the shape of the room and the decoration. It will work well for square rooms with no obstacles and sound reflecting walls. On the other hand, realistic scenarios often will vary from this ideal and reduce the result of this approach.
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