Short answer: the Xiaomi Sound Outdoor. It ranks #43 of 142 medium speakers by sound quality at $54.99; the Ultimate Ears Wonderboom 2 ranks #89 and costs $80, so there is little reason to consider the other one.
What the Xiaomi Sound Outdoor offers: Xiaomi Sound Outdoor uses 20W woofer, 10W tweeter + 2x passive radiators. Its 597 g, claimed 12 hours (Manufacturer specified) battery life, IP67 protection and mono playback make it a practical option for its intended room or portable use. Watch for: Its 60Hz - 20kHz (Manufacturer specified) specification points to limited deep-bass reach for the cabinet size. There is no companion app. No EQ adjustment.
What the Ultimate Ears Wonderboom 2 offers: IP67 rated and floats. Compact and light enough to toss in a bag. Watch for: Not stereo, barely any bass, recessed treble. Slightly boosted 93hz upper bass Dip at 9khz. You can tell from the micro USB that they are just feeding you the same crap hardware over and over, this is inexcusable for a product released in 2019. Not technically a 360 speaker, only front and rear.
Buy the Xiaomi Sound Outdoor. It ranks higher for sound quality than the Ultimate Ears Wonderboom 2 and costs less, so there is no real case for the other one.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Xiaomi Sound Outdoor | Ultimate Ears Wonderboom 2 | |
|---|---|---|
| Price | $54.99 | $80 |
| Ranked | #43 of 142 in Medium Size Portable Bluetooth Speakers | #89 of 142 in Medium Size Portable Bluetooth Speakers |
| App | No | No |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Built-in Microphone | Yes | No |
| EQ | No | No |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Speakersync, up to 100 speakers) | No |
| Power Input | USB-C | Micro USB |
| Stereo | No | No |
| Omnidirectional | No | Yes |
| TWS | Yes | Yes |
| Weight | 1.3 lbs (597 g) | 0.9 lbs (420 g) |
| Bluetooth Version | 5.4 | 5.1 |
| Dimensions | 7.7" x 2.7" x 2.6" (196.6 x 68 x 66 mm) | 4.1" x 3.8" (104 x 95.3 mm) |
| Drivers | 20W woofer, 10W tweeter + 2x passive radiators | 2x 40mm active drivers + 2x passive radiators |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 30W | - |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Bass Extension (-10dB) | - | 82Hz |
| Maximum SPL | - | 88dB (measured by Alan Ross Reviews) |
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Prices on this page were last checked September 16, 2026 at 12:41 AM 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
Xiaomi Sound Outdoor: $54.99 Amazon eBay
Pros: Xiaomi Sound Outdoor uses 20W woofer, 10W tweeter + 2x passive radiators. Its 597 g, claimed 12 hours (Manufacturer specified) battery life, IP67 protection and mono playback make it a practical option for its intended room or portable use.
Cons: Its 60Hz - 20kHz (Manufacturer specified) specification points to limited deep-bass reach for the cabinet size. There is no companion app. No EQ adjustment.
Full Xiaomi Sound Outdoor review and specifications →
| Amplifier Power | 30W |
|---|---|
| App | No |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.4 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 7.7" x 2.7" x 2.6" (196.6 x 68 x 66 mm) |
| Drivers | 20W woofer, 10W tweeter + 2x passive radiators |
| EQ | No |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Speakersync, up to 100 speakers) |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 1.3 lbs (597 g) |
- Links
- Reviews, Comparisons and Sound Samples
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Ultimate Ears Wonderboom 2: $80 Amazon eBay
Pros: IP67 rated and floats. Compact and light enough to toss in a bag. Measured bass extension of 82Hz (-10dB).
Cons: Not stereo, barely any bass, recessed treble. Slightly boosted 93hz upper bass Dip at 9khz. You can tell from the micro USB that they are just feeding you the same crap hardware over and over, this is inexcusable for a product released in 2019. Not technically a 360 speaker, only front and rear.
Full Ultimate Ears Wonderboom 2 review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 82Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 4.1" x 3.8" (104 x 95.3 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators |
| EQ | No |
| IP Rating | IP67 |
| Maximum SPL | 88dB (measured by Alan Ross Reviews) |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Input | Micro USB |
| Stereo | No |
| TWS | Yes |
| Weight | 0.9 lbs (420 g) |
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