Short answer: the Xiaomi Sound Outdoor. It ranks #46 of 177 medium speakers by sound quality, rated 3.7/5, at $49.99; the Ultimate Ears Megaboom 3 ranks #107, rated 3.0/5, and costs $191.99, so there is not much of a tradeoff to weigh.
The Xiaomi Sound Outdoor is the better-sounding, lighter choice. An affordable waterproof outdoor speaker with a separate tweeter, decent battery life and linking to many more speakers. At 1.3 lbs (597 g) it weighs noticeably less than the Ultimate Ears Megaboom 3 at 2 lbs (925 g). It charges over USB-C rather than Micro USB. The catch: Bass reach is limited for the cabinet size, with a rated lower limit of 60Hz, and the boosted bass gets somewhat uncontrolled at high levels.
The Ultimate Ears Megaboom 3 is the longer-running choice. A tough waterproof speaker that floats and shrugs off drops, with a long 20 hour battery for beach and pool days. It is rated for 20 hours of battery against 12 for the Xiaomi Sound Outdoor. It has an adjustable EQ, which the Xiaomi Sound Outdoor lacks. The catch: Not stereo, barely any bass.
Buy the Xiaomi Sound Outdoor. It is rated higher for sound quality than the Ultimate Ears Megaboom 3 and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Portable Bluetooth rankings.
An affordable waterproof outdoor speaker with a separate tweeter, decent battery life and linking to many more speakers.
A tough waterproof speaker that floats and shrugs off drops, with a long 20 hour battery for beach and pool days.
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
| Xiaomi Sound Outdoor | Ultimate Ears Megaboom 3 | |
|---|---|---|
| Price | $49.99 | $191.99 |
| Ranked | #46 of 177 in Medium Size Portable Bluetooth Speakers | #107 of 177 in Medium Size Portable Bluetooth Speakers |
| App | No | Yes (UE | BOOM app) |
| Battery Life | 12 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Built-in Microphone | Yes | - |
| EQ | No | Yes (App EQ) |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Speakersync, up to 100 speakers) | Yes (PartyUp up to 50 speakers) |
| Power Input | USB-C | Micro USB |
| Stereo | No | No |
| Omnidirectional | No | Yes |
| TWS | Yes | Yes |
| Weight | 1.3 lbs (597 g) | 2 lbs (925 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.4 | 4.2 |
| Dimensions | 7.7” x 2.7” x 2.6” (196.6 x 68 x 66 mm) | 3.4” x 8.9” x 3.4” (87 x 225 x 87 mm) |
| Drivers | 20W woofer, 10W tweeter + 2x passive radiators | 2x 50mm fullrange |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | 60Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 30W | - |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Aux Input | No | No |
| Bass Extension (-10dB) | - | 70Hz |
| Maximum SPL | - | 98dB (measured by Alan Ross Reviews) |
| Strap | - | Yes (built-in loop) |
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