Sony XB21 Watts RMS

The XB21 Sony Bluetooth speaker is a small to medium power, desktop style unit with sufficient audio watts RMS to fill a typical size room with full sounding tunes.

But what do the watts a wireless speaker has, 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 watts of audio output 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 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 XB21, as a smaller wireless Bluetooth 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.

Sony XB21 Watts RMS: Details

1. 1. Battery Capacity: 11.34 watt-hours (3.78 volts, 3 amp-hours).
   2. USB Charger Power: 7.5 watts (5 volts at 1.5 amps), or 2.5 watts (5 volts at 0.5 amps).
   3. Light Power: Less than 2 watts.
   4. Bluetooth Standby Mode Power: Less than 0.3 watts.
   5. Power Bank Output Power: Not available on this speaker model.
   6. Total Audio Output Power on AC (RMS): 3 watts. *
   7. Total Peak Audio Power (both channels): 4.24 watts. *
   8. Output Power per Channel: 1.5 watts RMS. *
   9. Audio Output Power on Battery: Decreases as battery approaches depletion.

* = Estimated.

Sony XB21 Watts RMS: Notes

1. 1. The system tries to conserve battery power as the battery get close to total depletion.  The XB 21 does this by reducing the audio output power somewhat.
   2. The SRS XB21 speaker may not input enough enough power from a low power USB AC adapter to keep the battery from discharging when playing at full volume, depending on what you’re listening to.  So it’s possible that even with the unit plugged in, you could still see it shut OFF unexpectedly.  Thus on the (rare) occasions that this occurs, just stop playing the 21 for an hour or two, to let it build up some reserve power while charging. Then, fire it up again for continued party enjoyment.

Related Posts to Sony XB21 Watts RMS

1. 1. Sony SRS XG500 Watts RMS
   2. Sony XB33 Watts RMS
   3. Sony X2 Watts RMS
   4. Sony XB01 Watts RMS

Other Sony XB21 Posts

1. 1. How to Tell if Sony XB21 is Charging
   2. Sony XB21 Reset Instructions
   3. Sony XB21 Add Button Explained
   4. How to Check Sony XB21 Battery
   5. Sony XB21 Bluetooth Pairing Instructions

References

1. 1. Official Sony XB21 Support Page
   2. Where to Buy the Sony XB21

Revision History

• • 2023-04-02: First published.