Short answer: the Xiaomi Sound Party. It ranks #20 of 177 medium speakers by sound quality, rated 4.1/5, at $149.99. The Ultimate Ears Wonderboom 2 ranks #110, rated 2.9/5, at $80, $69.99 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Xiaomi Sound Party is the better-sounding, deeper-bass choice. A versatile outdoor speaker with warm, balanced sound, fully waterproof build, long battery life, a phone charging port and a handy retractable handle. Its bass reaches about 54Hz before falling 10dB, against 82Hz for the Ultimate Ears Wonderboom 2. Alan Ross Reviews measured it at 102dB at full volume, against 88dB for the Ultimate Ears Wonderboom 2. It is rated for 26 hours of battery against 12 for the Ultimate Ears Wonderboom 2. Watch for: The sound evidence is mixed rather than universally glowing.
The Ultimate Ears Wonderboom 2 is the lighter pick. A small waterproof speaker that floats and is light enough to toss in a bag for the pool or beach. At 0.9 lbs (420 g) it weighs much less than the Xiaomi Sound Party at 2.6 lbs (1.2 kg). Watch for: Not stereo, barely any bass, recessed treble.
Buy the Xiaomi Sound Party. It is rated higher for sound quality, and the $69.99 saving on the Ultimate Ears Wonderboom 2 is not enough to make up the difference.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A versatile outdoor speaker with warm, balanced sound, fully waterproof build, long battery life, a phone charging port and a handy retractable handle.
A small waterproof speaker that floats and is light enough to toss in a bag for the pool or beach.
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 Party | Ultimate Ears Wonderboom 2 | |
|---|---|---|
| Price | $149.99 | $80 |
| Ranked | #20 of 177 in Medium Size Portable Bluetooth Speakers | #110 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | No |
| Bass Extension (-10dB) | 54Hz | 82Hz |
| Battery Life | 26 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Built-in Microphone | Yes | No |
| EQ | Yes | No |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Party Connect, up to 100 speakers) | No |
| Power Bank | Yes (USB-C, 5V/3A) | - |
| Stereo | No | No |
| Omnidirectional | No | Yes |
| TWS | Yes | Yes |
| Digital Aux Input | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.4 | 5.1 |
| Dimensions | 10” x 3.6” x 3.6” (255 x 92 x 92 mm) | 4.1” x 3.8” (104 x 95.3 mm) |
| Drivers | 2x 40mm woofers (35W total) + 2x 15mm tweeters | 2x 40mm active drivers + 2x passive radiators |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Maximum SPL | 102dB (measured by Alan Ross Reviews) | 88dB (measured by Alan Ross Reviews) |
| Weight | 2.6 lbs (1200 g) | 0.9 lbs (420 g) |
| Amplifier Power | 50W | - |
| Power Input | USB-C (5V/3A, 9V/2A, 12V/2A) | Micro USB |
| Lights | Yes | - |
| Strap | Yes (detachable strap) | Yes (built-in loop) |
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