The newest series of wireless audio transmitter devices claims streaming of music throughout the house without limits. We will check if these newest products are suitable for whole-house audio. Also, we will give important suggestions for choosing a wireless music system.

If your home is not wired for audio then you face quite a problem when you want to get your music from your living room to your bed room. Frequently the audio source cannot be moved. Running speaker wires between rooms will be costly and as a result many people are looking for alternatives. There are a number of technologies solving this problem. These include infrared wireless, RF wireless, wireless LAN (WLAN) and powerline.

Infrared wireless audio devices are limited to line-of-sight applications, i.e. only operate within a single room because the signal is sent as infrared light which cannot go through walls. This technology is often found in wireless speaker kit products.

RF wireless products will broadcast the signal as RF waves. These waves can without difficulty go through walls. RF wireless audio devices either use FM transmission or digital audio transmission. FM transmitters are the cheapest option. They offer good range but the audio signal is prone to audio distortion and hiss and is extremely susceptible to interference from other wireless transmitters.

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 prior to transmission. This conversion and transmission in the digital domain will ensure that the original audio quality is maintained. On the other hand, this is only the case of the data is sent uncompressed. Some wireless audio transmitters will apply some sort of audio compression. Such products include Bluetooth audio transmitters. Audio compression will degrade the quality of the audio to some extent.

Products utilizing wireless LAN are useful when streaming audio from a PC. Their drawback is that they usually have some fairly high latency, i.e. the signal will be delayed by some amount since wireless LAN was not specifically designed for real-time audio streaming. Also, a number of products require to buy separate wireless LAN modules that are plugged into every audio receiver.

Powerline devices utilize the power mains to distribute music and offer great range but run into trouble if there are separate mains circuits in the house in terms of crossing between circuits. Another problem confronting powerline products are strong power surges and spikes. Such surges can cause drpouts in the audio due to errors in the transmission. To safeguard against these errors, powerline products generally build a delay of several seconds into the transmission.

Here are some guidelines for choosing the optimum 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 begin adding receivers in several rooms of your house. Selecting a product with some sort of error correction will help mitigate against strong RF interference. Such interference can be brought on by 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.

Pick a transmitter that has all of the audio inputs you require, e.g. speaker inputs, RCA inputs etc. Pick a system where you can add receivers later on which offer all of the necessary outputs, e.g. amplified speaker outputs, RCA outputs etc. If you go with a digital audio transmitter, choose one with an input audio level control knob to avoid the music signal from clipping inside the transmitter audio converter. This will guarantee 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. In addition, make sure the amplifier provides low audio distortion. This is vital for good sound quality. Make sure the receivers can drive speakers with your preferred Ohm rating. Selecting a product where the wireless receivers have a small footprint and easy mounting options will help in the course of the installation. Devices which work in the 5.8 GHz frequency band will have less problems with wireless interference than products using the crowded 900 MHz or 2.4 GHz frequency band.

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