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Helpful Hints For Finding The Optimal Wireless Audio Transmitter Device For Whole-House Audio Streaming
Recently more and more wireless audio transmitter devices have appeared which promise to bring the ultimate freedom of broadcasting music throughout the house. We will investigate if these latest devices are suitable for whole-house audio. Also, we will give important guidelines for choosing a wireless music system.
Getting audio from your living room to your bedroom can be quite a problem particularly in homes which are not wired for audio. The following technologies are used by products solving this problem: infrared, RF, wireless LAN and powerline.
Infrared wireless audio devices are restricted to line-of-sight applications, i.e. only operate within a single room because the signal is broadcast as infrared light which cannot penetrate walls. This technology is frequently found in wireless speaker kit products.
RF wireless audio devices broadcast the music signal via radio waves. These radio wave signals can easily go through walls. The signal is broadcast either by utilizing FM transmission or digital transmission. FM transmitters are the cheapest option. They provide decent range but the audio signal is prone to audio distortion and static and is extremely susceptible to interference from other wireless transmitters.
Digital wireless audio transmitter products, such as products from Amphony, utilize a digital protocol. The audio is first converted to digital data before being transmitted. This method ensures that the audio quality is fully preserved. Some transmitters utilize some form of audio compression, such as Bluetooth transmitters, which will degrade the audio to some degree. Transmitters which broadcast 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 since wireless LAN was not originally designed for real-time audio streaming. WLAN receivers often do not have built-in network access. As a result, such products frequently require purchasing separate LAN cards. These cards are then plugged into each receiver.
Powerline products use the power mains to distribute music and provide great range but run into trouble if there are individual mains circuits in the house in terms of crossing between circuits. Powerline products have another problem in the form of power surges and spikes which can cause transmission errors. To avoid audio dropouts, these products will normally have an audio latency of several seconds as a safeguard.
Here are some recommendations for picking a wireless audio system: If you plan to stream audio into several rooms of your house, be certain to go for a system that allows streaming to multiple receivers at the same time. That way you don’t have to buy a separate transmitter for every receiver that you are streaming to. 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 guarantee that the audio quality is maintained. Make sure the audio delay is less than 10 ms if you have a real-time application such as video.
Select a transmitter that has all of the audio inputs you require, e.g. speaker inputs, RCA inputs etc. Get a wireless system where you can buy additional receivers later on. You should verify that you can get receivers for all the different applications you have. Such receivers may include amplified receivers for passive speakers or line-level receivers for active speakers. Given that you may want to connect the transmitter to several sources, you should pick a transmitter that can be adjusted to different signal volume levels to prevent clipping of the audio signal inside the transmitter converter stage.
Check 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 offers low audio distortion. This is crucial for good sound quality. Verify that the amplified receiver is able to drive speakers with the preferred Ohm rating and that it is small and easily mountable for simple set up. 5.8 GHz wireless devices usually have less problems with interference from other wireless transmitters than products working at 900 MHz or 2.4 GHz.
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