vendredi 22 novembre 2013

A Number Of Tricks To Help Pick A Cordless Surround Sound Set

By Scott Humton


Various Guidelines To Help Select A Cordless Surround Sound Product An increasing number of wireless surround sound transmitter devices promise the ultimate freedom in streaming audio all over the home. We will look at the most widespread technologies for wireless audio and give some advice for selecting the best wireless audio product.

Getting audio from your living room to your bed room can be quite a problem especially in buildings which are not wired for audio. The following technologies are utilized by devices solving this problem: infrared, RF, wireless LAN and powerline.

Running audio in your house can be a intimidating job. A lot of houses are not wired for multi-room audio and getting the music from your living room to your bed room can be quite a problem. There are several technologies solving this problem. These include infrared wireless, RF wireless, wireless LAN (WLAN) and powerline.

RF wireless products send the music as RF waves - either by using FM transmission or digital transmission - and can for that reason without problems transmit through walls. FM transmission is inexpensive but quite prone to noise, audio distortion and susceptible to interference. Products using digital wireless audio transmission, such as Amphony audio transmitter products, employ a digital protocol in which the audio is converted to a digital signal before transmission. This method guarantees that the audio quality is completely maintained. Some transmitters employ some sort of audio compression, such as Bluetooth transmitters, which will degrade the audio to some extent. Transmitters which send the audio data uncompressed will attain the highest fidelity.

Wireless LAN (WLAN) products are practical when streaming from a PC but will add some amount of latency or delay to the signal because wireless LAN was not originally designed for real-time audio streaming. Also, a number of products require to purchase separate wireless LAN modules that are plugged into every audio receiver.

WLAN products are convenient for broadcasting audio from a PC. However, wireless LAN was never designed for real-time audio streaming. As a consequence, products using WLAN will introduce some amount of delay to the signal. Also, a number of products require to buy separate wireless LAN modules that are plugged into every audio receiver.

Here are some tips for picking the perfect wireless audio system: Try to find a system that can run several wireless receivers from a single transmitter. Ideally an unlimited number of receivers should be supported. That way you don't need to purchase additional transmitters when you start adding receivers in different rooms of your home. Some devices have some type of error correction built in which will help guard against dropouts in case of strong wireless interference. Digital RF audio transmitters will be able to preserve the original audio quality. If you have time-critical applications where sync of the audio is crucial then you should get a transmitter with a low audio latency. An audio latency of smaller than 10 ms would be suitable for most scenarios.

Pick a transmitter that has all of the audio inputs you need, e.g. speaker inputs, RCA inputs etc. Make sure that you can buy additional receivers later on as you expand your system. Check that you can get receivers with speaker outputs for connecting regular loudspeakers as well as receivers with line-level RCA outputs. If you go with a digital audio transmitter, pick one with an input audio level control knob to avoid the music signal from clipping inside the transmitter audio converter. This will ensure optimum dynamic range regardless of the signal level of your equipment.

Make sure that the system provides amplified receivers with a digital amplifier to ensure high power efficiency. This will help keep the receiver cool during operation. Also, make sure the amplifier offers low audio distortion. This is vital for good sound quality. Select a system which offers receivers that can drive speakers with the preferred Ohm rating. Make sure the receivers have a small form factor and are easily mountable. This will help during the installation. 5.8 GHz wireless devices usually have less trouble with interference from other wireless transmitters than products working at 900 MHz or 2.4 GHz.




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