Short answer: the Harman Kardon Luna 2. It ranks #25 of 179 medium speakers by sound quality (rated 4.1/5) at $199.95 and is still sold new; the Ultimate Ears Roll 2 ranks #164 (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 Harman Kardon Luna 2 is the better-sounding pick. A stylish waterproof speaker with clear, spacious mids, tight bass that stays clean at volume, and stereo pairing with a second unit. It charges over USB-C rather than Micro USB. The tradeoff: Treble can sound bright and edgy, and it loses more output off-axis than some rivals.
The Ultimate Ears Roll 2 is the lighter option. A thin, flat waterproof speaker with a bungee cord for hanging from a hook or door handle, now discontinued. At 0.7 lbs (330 g) it weighs much less than the Harman Kardon Luna 2 at 1.6 lbs (735 g). It keeps a wired aux input, which the Harman Kardon Luna 2 lacks. The tradeoff: Barely any bass, rolled off treble off axis.
Buy the Harman Kardon Luna 2. 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.
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Specifications Side By Side
| Harman Kardon Luna 2 | Ultimate Ears Roll 2 | |
|---|---|---|
| Price | $199.95 | $100 Discontinued |
| Ranked | #25 of 179 in Medium Size Portable Bluetooth Speakers | #164 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (UE Roll app) |
| Aux Input | No | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 9 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| EQ | Yes (4 presets + custom) | Yes (5-band via UE ROLL app) |
| IP Rating | IP67 | IPX7 |
| MicroSD Playback | No | - |
| Power Input | USB-C | Micro USB |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | No |
| USB Playback | No | - |
| Weight | 1.6 lbs (735 g) | 0.7 lbs (330 g) |
| Bluetooth Version | 5.4 | 4.0 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 5.9” x 5.3” x 1.6” (149.5 x 135 x 40 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 1x 2” full-range + 2x 0.75” tweeters |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | - |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 10W |
| Digital Aux Input | No | No |
| Strap | No | - |
| Built-in Microphone | - | No |
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