Picture of the UE Roll Bluetooth speaker, front view.

UE Roll Watts Output, Input, AC Adapter, …

The Roll 1 UE Bluetooth speaker by Logitech is a small power, hand-held format unit with enough RMS watts to fill a tent, bedroom, or attic with full sounding tunes.

But what do the watts a BT speaker has, say about how good it is?  Firstly, the watt is a measure of how much power the speaker uses and pumps out.  Plus, this metric is a telling comparison measure. Why? Because generally, speakers with more watts of audio 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 some big plusses.  They have more dynamic range, a deeper bass response, and the models that play in stereo like this Ultimate Ears Roll, offer typically a bigger soundstage and better stereo imaging to listeners.

Picture of the UE Roll speaker, back view, connected to USB power and charging.
UE Roll speaker, back view, connected to USB power and charging.

Thus in general, the more powerful the speaker, the better it sounds, even at softer volume settings. You get improved clarity because of higher accuracy reproduction of the bass, midrange, and treble parts of the program. Plus, more reserve power likely means less clipping too, even at loudest volumes. So, the speaker’s maximum watts output gives a good idea about speaker quality and performance.  And as such, this value is of great interest to audiophiles and novice listeners alike.

In this case, the UE Roll speaker, as a mini size portable BT model, is decently loud. Its more than five watts can fill a small size party area with clear and full music. See below for details on its power output.

UE Roll Watts Details

    1. Battery Capacity: 8.14 watt-hours (3.7 volts, 2,200 milliamp-hours (mAh)).
    2. USB Charger Power: 10 watts (5 volts at 2 amps).
    3. Power Bank Output Power: Not available on this speaker.
    4. Recharge Time: 3.0 to 5.5 hours depending on amount of charging current.
    5. Play Time Per Recharge: Up to 9 hours.
    6. Total Audio Output Power on AC (RMS): 8 watts (2 x 4 watts). **
    7. Total Peak Audio Power: 11.31 watts. **
    8. Output Power per Channel: 4 watts RMS (two channels in this speaker). **

** = Estimated.

Notes on UE Roll Watts

    1. This Logitech UE speaker may not input enough enough power from a low power USB AC adapter (under 10 watts capacity) to keep the battery from discharging when playing at max volume, depending on what you’re listening to.  So it could happen that even with this unit fed from external power, you could still see the music drop out abruptly.  Thus on the (rare) times that this occurs, just stop playing the speaker for an hour or two, to let it build up some reserve battery power while charging. Then, fire it up again for continued party enjoyment.

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Other Posts About the UE Roll Portable Speaker

    1. UE Roll Charger Type and Replacement
    2. UE Roll Firmware Update Instructions
    3. How to Pair UE Roll with iPhone
    4. UE Roll 1 Charging Instructions
    5. Resetting UE Roll Speaker Directions


Revision Log

    • 2022-08-28: First published.