Amplifier 8 Ohm
Recommendations For Selecting The Perfect Wireless Audio Transmitter Product For Whole-House Audio Streaming
A growing number of wireless audio transmitter products promise the ultimate freedom in streaming music all over the house. We will take a look at numerous products and technologies to find out in how far these products are effective for whole-house audio uses and what to look out for when buying a wireless 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. Often the audio source cannot be moved. Running speaker wires between rooms will be expensive and for that reason a lot of people are searching for other options. Devices which solve this difficulty are usually based on the following technologies: infrared wireless, RF wireless, wireless LAN or powerline.
Infrared wireless audio products are restricted to line-of-sight applications, i.e. only function within a single room since the signal is broadcast as infrared light which cannot penetrate walls. This technology is often found in wireless speaker kit products.
RF wireless audio devices send the music signal via radio waves. These radio wave signals can without difficulty go through walls. The signal is broadcast either by using FM transmission or digital transmission. FM transmitters are the cheapest option. They offer decent range but the audio signal is prone to audio distortion and hiss and is very susceptible to interference from other wireless transmitters.
Products which utilize digital wireless audio transmission utilize a digital protocol. Such products include transmitters from Amphony. In this protocol, prior to transmission the audio signal is converted to digital data. This method ensures that the audio quality is completely maintained. Some transmitters use some type of audio compression, such as Bluetooth transmitters, which will degrade the audio to some extent. Transmitters which send the audio data uncompressed will achieve the maximum fidelity.
Products using wireless LAN are useful when streaming audio from a PC. Their downside is that they typically 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 purchase separate wireless LAN modules that are plugged into each audio receiver.
Powerline products use the power mains as a medium to broadcast the audio. These products usually provide excellent range. However, they face problems if there are a number of separate mains circuits in the home. In this case the signal will have trouble crossing between these circuits. Also, these products build in a delay of a number of seconds to safeguard against transmission errors during power surges and spikes which prevents their use in applications where the audio from wireless speakers has to be in sync with other non-wireless speakers or video.
Here are some pointers 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 buy extra transmitters when you start adding receivers in different rooms of your home. Products with some type of error correction will be more immune against radio interference from other wireless transmitters. Choose 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.
Make sure the wireless transmitter provides the audio inputs you need. You may need amplified speaker inputs, RCA audio inputs etc. Select a system where you can add receivers later on which offer all of the required outputs, e.g. amplified speaker outputs, RCA outputs etc. Select a transmitter that can regulate the audio volume of the input stage. This will give you the flexibility to connect the transmitter to any type of equipment with different signal levels. Otherwise the audio may get clipped inside the transmitter converter stage or the dynamic range is not fully utilized.
For high amplifier power efficiency and greatest sound quality, confirm that the amplified receiver has a built-in low-distortion digital amplifier. Choose a system which offers receivers that can drive speakers with the desired Ohm rating. Make sure the receivers have a small form factor and are easily mountable. This will help during the set up. Products utilizing the less crowded 5.8 GHz frequency band will typically have less trouble with wireless interference than 900 MHz or 2.4 GHz products.
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