Short answer: the KEF Muo gen2. It ranks #97 of 175 medium speakers by sound quality (rated 3.1/5) at $249.99 and is still sold new; the Ultimate Ears Roll 2 ranks #161 (rated 2.2/5) and is discontinued, so it is only an option used. The Ultimate Ears Roll 2’s replacement, the Ultimate Ears Miniroll, is still sold new.
The KEF Muo gen2 is the better-sounding, longer-running pick. KEF seemed to have fixed the rolled off treble and overall balance. It is rated for 24 hours of battery against 9 for the Ultimate Ears Roll 2. It plays in stereo from a single unit, unlike the Ultimate Ears Roll 2. It charges over USB-C rather than Micro USB. Watch for: Lacking deeper bass.
The Ultimate Ears Roll 2 is the lighter option. Thin, flat profile fits easily in a bag or purse. At 0.7 lbs (330 g) it weighs much less than the KEF Muo gen2 at 1.6 lbs (740 g). It keeps a wired aux input, which the KEF Muo gen2 lacks. The catch: Barely any bass, rolled off treble off axis.
Buy the KEF Muo gen2. It is rated higher for sound quality and still sold new, while the Ultimate Ears Roll 2 is discontinued.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| KEF Muo gen2 | Ultimate Ears Roll 2 | |
|---|---|---|
| Price | $249.99 | $100 Discontinued |
| Ranked | #97 of 175 in Medium Size Portable Bluetooth Speakers | #161 of 175 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (UE Roll app) |
| Battery Life | 24 hours (Manufacturer specified) | 9 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, aptX Adaptive up to 48 kHz 24 bit | SBC (inferred; additional codecs unverified) |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Auracast) | - |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | No |
| Digital Aux Input | Yes (USB-C) | No |
| Weight | 1.6 lbs (740 g) | 0.7 lbs (330 g) |
| Bluetooth Version | 5.4 | 4.0 |
| Drivers | 1x 58x117mm racetrack woofer, 1x 20mm tweeter | 1x 2” full-range + 2x 0.75” tweeters |
| Dimensions | 8.5” x 3.2” x 2.3” (216 x 82 x 59 mm) | 5.9” x 5.3” x 1.6” (149.5 x 135 x 40 mm) |
| Frequency Response | 43Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 40W | 10W |
| Maximum SPL | 90dB (Manufacturer specified) | - |
| Aux Input | No | Yes |
| EQ | Yes | Yes (5-band via UE ROLL app) |
| Power Input | USB-C | Micro USB |
| Built-in Microphone | - | No |
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More worthwhile head-to-heads for KEF Muo gen2:
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- Soundcore Motion 300 vs KEF Muo gen2
- Soundcore Motion+ vs KEF Muo gen2
- Soundcore Boost “upgraded” 2021 vs KEF Muo gen2
- Denon Envaya DSB-250BT vs KEF Muo gen2
Prices on this page were last checked October 12, 2026 at 4:13 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
KEF Muo gen2: $249.99 Amazon $249.99 eBay
Pros: KEF seemed to have fixed the rolled off treble and overall balance
Cons: Lacking deeper bass. Very thuddy bass. Appears to be the exact same hardware but with updated tuning. Bass distorts as volume increases, and the claimed 43Hz extension is really only audible at low listening volumes, with a few seconds of lag after volume changes. Loses most of its bass off-axis. Customer reviews are mixed, ranging from praise for detail at low volume to complaints of a boxy, hollow sound.
Full KEF Muo gen2 review and specifications →
| Amplifier Power | 40W |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, aptX Adaptive up to 48 kHz 24 bit |
| Bluetooth Version | 5.4 |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 8.5” x 3.2” x 2.3” (216 x 82 x 59 mm) |
| Drivers | 1x 58x117mm racetrack woofer, 1x 20mm tweeter |
| EQ | Yes |
| Frequency Response | 43Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Maximum SPL | 90dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.6 lbs (740 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Ultimate Ears Roll 2: $100 Discontinued eBay
Newer model: the Ultimate Ears Miniroll, rated 3.9/5, released Sep 2024. It adds built-in mic and stereo pairing, but drops the aux input, app control and adjustable EQ. Battery life goes from 9 to 12 hours. See every Ultimate Ears Roll generation.
Pros: Thin, flat profile fits easily in a bag or purse. Built-in bungee cord for hanging from a hook, nail, or door handle. Life-resistant waterproof/dustproof shell.
Cons: Not stereo. Barely any bass, rolled off treble off axis. Discontinued.
Full Ultimate Ears Roll 2 review and specifications →
| Released | May 2016 (10 years ago) |
|---|---|
| Amplifier Power | 10W |
| App | Yes (UE Roll app) |
| Aux Input | Yes |
| Battery Life | 9 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 4.0 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 5.9” x 5.3” x 1.6” (149.5 x 135 x 40 mm) |
| Drivers | 1x 2” full-range + 2x 0.75” tweeters |
| EQ | Yes (5-band via UE ROLL app) |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Power Input | Micro USB |
| Stereo | No |
| TWS | No |
| Weight | 0.7 lbs (330 g) |
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