The SRS XB31 Sony Bluetooth speaker is a moderate to medium power, desktop style unit with sufficient RMS watts to fill a typical size room with full sounding tunes.
But what do the watts a BT speaker has, tell us about how good it is? Firstly, the watt is a measure of how much power the speaker requires and outputs. Plus, this metric is a nifty comparison measure. Why? Because generally speaking, speakers with more watts of audio output tend to play louder than those with less.
While they do cost more, have bigger, heavier batteries and chargers, along with larger drivers and magnets, they nonetheless offer advantages. They have greater dynamic range, have a deeper bass response, and the models that play in 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 watts RMS 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 XB31, as a smaller Bluetooth wireless speaker, is a decently loud model for all the bigger it is. Its watts can fill a small to medium size room with clear music. See below for details on its power output.
* = Estimated.
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