Examples of home speakers that use Bluetooth technology include Harman Kardon Aura, Bose SoundLink Mini II, Amazon Echo and Polk Audio Hampden models. Although these models, with the exception of Harman Kardon Aura, don’t include features such as AirPlay, which lets user stream music from their iTunes libraries, they are portable and relatively cheap. Prices range from $179 to $399, as of 2015.
Bluetooth speakers work by being paired with an audio output device. This feature ensures a high degree of compatibility, but it limits the number of audio sources from which the speakers can stream music. Other benefits include the use of rechargeable batteries and compact size. However, these benefits come at the expense of not having the power of some bulkier speaker models.
The Harman Kardon Aura model is designed to produce sound omnidirectionally, with 15 watts of power channeled to the left and right channels, and 30 watts to the subwoofer. Users can also connect it to devices via 3.5 millimeter and optical wired connections, while those with iOS devices can use it as an AirPlay speaker. Unlike the other three speaker models, Amazon Echo features voice recognition functionality, allowing users to control audio playback and access different apps. This functionality also lets users record custom commands via the voice training feature in the built-in Echo app.