Home Theater

Latest Technologies Make Installing Surround Sound Kits A Snap

Setting up multi-channel audio including a home theater system has always been rather complicated and vendors recently have come up with unique products and technologies like wireless”>http://www.amphony.com/products/wireless-speaker-kit.htm”>wireless speaker kit products or virtual surround sound to help simplify this procedure. I will look at the most recent trends to understand which devices really work. I will also give some guidance for selecting the ideal components.

The majority of recent TVs will be installed as a multi-channel audio system. As traditionally TVs would contain built-in stereo loudspeakers, nowadays a number of external loudspeakers are used to let the viewer experience surround sound. While the traditional 5.1 format needs 6 speakers: a front center, two front side speakers, two rear speaker and a subwoofer, the more modern 7.1 format adds two additional side speakers.

As a result setting up a home theater has turn out to be quite complex and long speaker cable runs are normally undesirable for aesthetic reasons. Suppliers have recently launched new products and technologies. These devices were developed to help simplify the installation of home theater systems.

One solution is reducing the number of speakers by creating virtual loudspeakers. This approach applies signal processing to the audio and adds phase shifts and cues to the audio that would ordinarily be broadcast through the remote speaker. Because the signal processing is based on how the human hearing detects the origin of audio, the sound components which underwent signal processing can be mixed with the front speaker components and broadcast by the front loudspeakers. The viewer is in effect tricked into assuming the sound is coming from a location other than the front speakers.

This technology reduces the quantity of needed loudspeakers and avoids long speaker cords but each person will process sound slightly differently because of the shape of the ear. Because the signal processing is based on a standard human ear model, virtual surround will not function equally well for everybody depending on how much the viewer differs from the standard model.

Wireless surround sound products are one more approach for simplifying home speaker installations and normally include a transmitter component which connects to the source and also wireless amplifiers that will connect to the remote speakers. Usually the transmitter component will include amplified speaker inputs and line-level inputs. This offers freedom to connect to each kind of source. A transmitter volume control helps take full advantage of the dynamic range and avoids clipping of the sound within the transmitter.

A number of wireless speaker devices are designed to connect 2 speakers per wireless amplifier. A superior solution would provide a wireless amplifier for each remote speaker to avoid the cord runs between each of the 2 remote speakers. The most basic wireless devices employ FM broadcast. FM transmission is prone to noise and sound distortion. More sophisticated systems utilize digital audio transmission to perfectly preserve the original audio. To make certain that all loudspeakers are in sync in a multi-channel application, make sure that you pick a wireless system which has an audio latency of just a few milliseconds at most. Otherwise there will be a noticeable echo type effect. Wireless kits often utilize the 900 MHz or 2.4 GHz frequency band. Some products also use the 5.8 GHz band. These devices have less competition from other wireless devices than products using the crowded 900 MHz or 2.4 GHz bands.

Another approach are side-reflecting loudspeakers. These kits are also called sound bars. The audio that would ordinarily be sent by the remote speakers is instead sent by speakers at the front. These front speakers broadcast the sound at an angle. Then the sound is reflected by the side and rear walls and appears to be coming from besides or behind the viewer. This approach works best in a square room with minimum interior design and obstacles. It will not function well in a lot of real-world scenarios with different room shapes though.

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