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Key Points For Selecting The Optimal Wireless Audio Transmitter Product For Whole-House Audio Streaming
A growing number of wireless audio transmitter products claim the ultimate freedom in streaming music all over the house. We will take a look at various products and technologies to find out in how far these products are useful for whole-house audio uses and what to look out for when buying a wireless system.
Running audio in your house can be a intimidating job. Many houses are not wired for multi-room audio and getting the music from your living room to your bedroom can be quite a challenge. There are a number of technologies solving this problem. These include infrared wireless, RF wireless, wireless LAN (WLAN) and powerline.
Infrared is limited to line of sight since the audio signal is broadcast as lightwaves and for that reason devices utilizing this technology, such as infrared wireless surround sound products, are limited to a single room.
RF wireless products send the audio as RF waves - either by utilizing FM transmission or digital transmission - and can as a result without difficulty transmit through walls. FM transmission is economical but rather prone to noise, audio distortion and susceptible to interference.
Products which use digital wireless audio transmission utilize a digital protocol. Such products include transmitters from Amphony. In this protocol, before transmission the audio signal is converted to digital data. This method guarantees that the audio quality is fully maintained. Some transmitters utilize some sort of audio compression, such as Bluetooth transmitters, which will degrade the audio to some degree. Transmitters which broadcast the audio data uncompressed will achieve 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 devices frequently require purchasing separate LAN cards. These cards are then plugged into each receiver.
Powerline devices employ the power mains to distribute audio and offer great range but run into problems if there are individual mains circuits in the home 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 commonly build a delay of several seconds into the transmission.
Now we'll give you some guidelines for shopping for a wireless system: Pick a system that supports multiple wireless receivers if you plan to stream audio to several rooms so that you don't have to purchase a separate transmitter for each receiver. Some products have some form of error correction built in which will help guard against dropouts in case of strong wireless interference. Pick a digital RF audio transmitter to make sure 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 offers the audio inputs you require. You may need amplified speaker inputs, RCA audio inputs etc. Make sure that you can purchase 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. Because you may want to connect the transmitter to several sources, you should select a transmitter that can be adjusted to different signal volume levels to prevent clipping of the audio signal inside the transmitter converter stage.
Make sure that the amplified wireless receivers have built-in digital amplifiers with low distortion figures. This will keep the receiver cool due to high amplifier power efficiency and provide optimum sound quality. Verify that the amplified receiver is able to drive speakers with the desired Ohm rating and that it is small and easily mountable for simple installation. Products utilizing the less crowded 5.8 GHz frequency band will normally have less trouble with wireless interference than 900 MHz or 2.4 GHz devices.
The Rube-Goldberg of car audio (Hackaday)
[Anthony Pray] had his car stereo stolen. When thinking about replacing it he
realized the he and his wife never used it for anything other than an
Auxiliary connection to play songs from their cellphones. So instead of buying
a head unit he pulled an unused home audio amplifier out of a dark corner of
[...]
Fender Blacktop Jaguar HH
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