Short answer: the KEF Muo gen2 for better sound quality, the Ultimate Ears Roll 2 for the lower price. The KEF Muo gen2 ranks #73 of 136 medium speakers at $249.99. The Ultimate Ears Roll 2 ranks #125 at $100, $149.99 cheaper.
What the KEF Muo gen2 offers: KEF seemed to have fixed the rolled off treble and overall balance Watch for: 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.
What the Ultimate Ears Roll 2 offers: Thin, flat profile fits easily in a bag or purse; light at 0.73 lb. Built-in bungee cord for hanging from a hook, nail, or door handle. Life-resistant waterproof/dustproof shell. Watch for: Not stereo. Barely any bass, rolled off treble off axis
Buy the KEF Muo gen2 when sound quality outweighs the price for you, and the Ultimate Ears Roll 2 when the price outweighs sound quality instead.
If sound quality matters at all to you, skip the Ultimate Ears Roll 2. It ranks near the bottom of the 136 medium speakers, so look higher up the list instead.
If battery life is a priority, the KEF Muo gen2 is rated for 24 hours versus 9 hours for the Ultimate Ears Roll 2.
Specifications Side By Side
| KEF Muo gen2 | Ultimate Ears Roll 2 | |
|---|---|---|
| Price | $249.99 | $100 |
| Ranked | #73 of 136 in Medium Size Portable Bluetooth Speakers | #125 of 136 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (UE Roll app) |
| Battery Life | 24 hours (Manufacturer specified) | 9 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, aptX Adaptive up to 48 KHz 24 bit | - |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Auracast) | - |
| Stereo | Yes | - |
| 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) | - |
| Output Power | 40W | - |
| Max Volume | 90dB | - |
| Built in Microphone | - | No |
| Power Input | - | Micro USB |
| Aux Input | - | Yes |
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Prices on this page were last checked August 27, 2026 at 10:09 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 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 →
| App | Yes |
|---|---|
| Battery Life | 24 hours (Manufacturer specified) |
| 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 |
| Frequency Response | 43Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Max Volume | 90dB |
| Omnidirectional | No |
| Output Power | 40W |
| Party Mode | Yes (Auracast) |
| 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 eBay
Pros: Thin, flat profile fits easily in a bag or purse; light at 0.73 lb. 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
Full Ultimate Ears Roll 2 review and specifications →
| App | Yes (UE Roll app) |
|---|---|
| Aux Input | Yes |
| Battery Life | 9 hours (Manufacturer specified) |
| 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 |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Power Input | Micro USB |
| TWS | No |
| Weight | 0.7 lbs / 330 g |
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