How do wireless speakers work? – A brief introduction

How do wireless speakers work?
Magic? Harry Potter Wand Tricks? Leprechauns?
There is really no direct answer to this question. Wireless speakers can work in a variety of technologies, including radio frequency (RF), Bluetooth, and even today, including Wi-Fi.
The basic process, however, remains the same. A wireless transmitter is connected to an audio system such as an iPod, a computer, a Blu-Ray player, a TV, etc. This transmitter sends a signal to the speakers which, in turn, converts it into sound. The signal can be transmitted through different technologies, which we will discuss below.
Radio Frequency
Radio Frequency or RF, is the most common technology used in wireless speakers. The loudspeakers use a particular unused band of the radio spectrum to transmit data wirelessly. A cordless phone works on the same principle.
RF is a fairly efficient, flexible and affordable technology. It has a good range, extending over 100 feet on certain models (and over 300 feet on some outdoor speakers). There is a good amount of data loss that can cause degradation of the audio signal, resulting in poor quality playback. Conflicting signals from other home wireless devices, such as wireless routers and cordless phones, can cause interference, causing data loss and disturbance. However, despite its popularity, RF can be phased out over the next few years as new technologies take over.
Bluetooth
If you bought a new mobile phone in the past 2 years, you would definitely be familiar with Bluetooth. As a wireless data transfer standard used on practically all mobile phones, Bluetooth is ubiquitous these days. Through this technology, two Bluetooth enabled devices can be connected wirelessly in seconds. Once a connection is established, data can be transferred wirelessly at speeds of up to 3 MB / second.
Technologically, Bookshelf Speaker Reviews works on the radio spectrum as well. However, instead of using a single band, Bluetooth cuts data and distributes it in 79 different bands, thus improving speed and reducing data loss. These bands range from 2400 MHz to 2483.5 MHz.

Bluetooth has a smaller range than pure RF signals. On the positive side, since the full spectrum of 2400-2483.5 MHz (79 bands, along with spare guard bands) is allocated for the use of Bluetooth, there is no interference from other wireless devices.
A key problem with Bluetooth is that it is not available on all devices. Older phones, most audio and video players, televisions and the desktop computer are not equipped with native Bluetooth. To use a pair of Bluetooth wireless speakers with these devices, you will need to invest in a Bluetooth transmitter. However, if you are primarily using a Bluetooth-enabled device such as an iPhone or an iPod Touch to listen to your music, you will find that Bluetooth wireless speakers are a competent RF competitor.
Wifi
Only a few select speakers use Wi-Fi to transmit data, such as the Sonos Play speaker series. This is the same simple vanilla Wi-Fi used in your home. It is fast and efficient and works great with digital devices, Wi-Fi enabled for computers and mobile phones.
However, most audio players, televisions, etc. are not Wi-Fi enabled. This means that a Wi-Fi wireless speaker can only play audio from your computer or mobile phone. Obviously, this limits its functionality and is the only reason why wireless Wi-Fi speakers have not been accepted by the mainstream.



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