Saturday, 7 December 2013

Several Tricks To Help Pick A Cordless Surround Sound Kit

By Scott Humton


Various Helpful Hints To Help Pick A Wireless Surround Sound Package

The latest series of wireless surround sound transmitter devices claims streaming of music throughout the home without limits. We will have a look at numerous products and technologies to find out in how far these devices are useful for whole-house audio uses and what to look out for when buying a wireless system. Getting audio from your living room to your bed room can be quite a problem especially in houses 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 home can be a intimidating undertaking. Numerous houses are not wired for multi-room audio and getting the music from your living room to your bedroom can be quite a problem. There are a number of technologies solving this problem. These include infrared wireless, RF wireless, wireless LAN (WLAN) and powerline.

Infrared products send the audio as lightwaves. Light cannot penetrate walls. For that reason devices utilizing infrared, such as wireless surround sound kits, are limited to a single room. RF wireless products will broadcast the signal as RF waves. These waves can easily penetrate walls. RF wireless audio devices either make use of FM transmission or digital audio transmission. FM transmission is cheap but quite prone to noise, audio distortion and susceptible to interference.

Products utilizing digital wireless audio transmission, such as Amphony audio transmitter products, utilize a digital protocol in which the audio is converted to a digital signal prior to transmission. Some wireless audio transmitters will utilize audio compression, such as Bluetooth transmitters which will lower the audio quality to some extent. Digital wireless audio transmitters which send the audio uncompressed offer the highest audio fidelity.

WLAN products are useful for broadcasting audio from a PC. However, wireless LAN was never designed for real-time audio streaming. As a consequence, products utilizing WLAN will introduce some amount of delay to the signal. WLAN receivers typically require purchasing a separate LAN card to be plugged into each receiver.

Powerline products use the power mains as a medium to send the audio. These products normally offer excellent range. However, they face problems if there are several separate mains circuits in the home. In this situation the signal will have problems crossing between these circuits. Another challenge facing powerline products are strong power surges and spikes. Such surges can bring about dropouts in the audio due to errors in the transmission. To safeguard against these errors, powerline products usually build a delay of several seconds into the transmission.

Here are some recommendations for selecting 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 extra transmitters when you start adding receivers in several rooms of your house. Products with some type of error correction will be more immune against radio interference from other wireless transmitters. Pick a digital RF audio transmitter to ensure that the audio quality is preserved. Make sure the audio latency is smaller than 10 ms if you have a real-time application such as video.

Ensure that the system offers amplified receivers with a digital amplifier to ensure high power efficiency. This will help keep the receiver cool during operation. In addition, make sure the amplifier provides low audio distortion. This is important for good sound quality. Verify that the amplified receiver can drive speakers with the desired Ohm rating and that it is small and easily mountable for simple installation. Products which function in the 5.8 GHz frequency band will have less problems with wireless interference than products utilizing the crowded 900 MHz or 2.4 GHz frequency band.




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