Sony SRS XB21 front right view.
The SRS XB21 Sony Bluetooth speaker is a small to medium power, desktop style unit with sufficient audio power output to fill a typical size room with full sounding tunes.
But what does the max power output a wireless speaker provides, tell us about how good it is? Firstly, the watt is a measure of how much power the speaker consumes or outputs. Plus, this metric is a nifty comparison measure. E.g. Generally speaking, speakers with more audio output power tend to play louder than those with less. And while they do cost more, have bigger, heavier batteries and chargers, along with larger drivers and magnets, they nonetheless offer greater dynamic range, have a deeper bass response, and the models that do stereo offer typically a bigger soundstage and better imaging to listeners.
Thus in general, the more powerful the speaker, the better it sounds, even at lower volume. You get improved clarity due to higher accuracy reproduction of the bass, midrange, and treble musical content. More reserve power could mean less clipping distortion too. So, the speaker’s maximum power output is a primary indicator of speaker quality and performance. And as such, this value is of great interest to audiophiles and novice listeners alike.
In this case, the Sony SRS XB21, as a smaller wireless Bluetooth speaker, is a decently loud model for all the bigger it is. Its output power can fill a small to medium size room with clear music. See below for details on its power output.
Power ratings here are given in watts.
* = Estimated.
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