Short answer: the Ultimate Ears Boom 4, though neither ranks well in its class. It ranks #112 of 177 medium speakers by sound quality (rated 2.9/5) at $114.99 and is still sold new; the Xdobo X8 ranks #158 (rated 2.3/5) and is discontinued, so it is only an option used. Both are rated below 3.0/5 among the 177 medium speakers, so if sound quality matters, consider the EarFun Uboom L instead, ranked #2 at $49.79.
The Ultimate Ears Boom 4 is the better-sounding, lighter pick. A tough waterproof speaker that floats, with USB-C charging, app EQ and pairing with other UE speakers. At 1.4 lbs (620 g) it weighs noticeably less than the Xdobo X8 at 1.9 lbs (860 g). It is rated IP67 against IPX5 for the Xdobo X8. It plays in stereo from a single unit, unlike the Xdobo X8. The tradeoff: Not much improvement over the old ones.
The case for the Xdobo X8: A cheap splash resistant speaker that plays loud for background music outdoors, with aux and microSD playback. It keeps a wired aux input, which the Ultimate Ears Boom 4 lacks. The catch: The single full-range driver is the limitation.
Buy the Ultimate Ears Boom 4. It is rated higher for sound quality, and the Xdobo X8 is discontinued, so it is only available used.
Want more options? Browse the full Portable Bluetooth rankings.
A tough waterproof speaker that floats, with USB-C charging, app EQ and pairing with other UE speakers.
Prices on this page were last checked October 31, 2026 at 7:11 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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Specifications Side By Side
| Ultimate Ears Boom 4 | Xdobo X8 | |
|---|---|---|
| Price | $114.99 | $35 Discontinued |
| Ranked | #112 of 177 in Medium Size Portable Bluetooth Speakers | #158 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Battery Life | 15 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX5 |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| Weight | 1.4 lbs (620 g) | 1.9 lbs (860 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | 5.0 |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) | 8.7” x 3.7” x 2.8” (220 x 95 x 72 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators | 66mm full-range driver |
| TWS | Yes | Yes |
| EQ | Yes (via app) | Yes (multiple modes) |
| Built-in Microphone | No | Yes |
| Power Bank | No | - |
| Aux Input | No | Yes |
| Maximum SPL | 85dBC (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Strap | Yes (built-in loop) | - |
| Bass Extension (-10dB) | - | ~65Hz |
| MicroSD Playback | - | Yes |
| Amplifier Power | - | 60W |
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