Short answer: the Xiaomi Sound Outdoor. It ranks #45 of 157 medium speakers by sound quality (rated 3.7/5); the Boat Stone 350 ranks #135 (rated 2.3/5).
The Xiaomi Sound Outdoor is the better-sounding, longer-running choice. A decent sounding speaker for its size. It is rated for 12 hours of battery against 6 for the Boat Stone 350. The catch: Boosted bass that gets somewhat uncontrolled at high levels.
The Boat Stone 350 is the lighter option. 10W cylindrical stereo speaker with dual passive radiators, IPX7 water resistance, microSD card slot, and 3.5mm aux input. At 0.9 lbs (426 g) it weighs noticeably less than the Xiaomi Sound Outdoor at 1.3 lbs (597 g). It keeps a wired aux input, which the Xiaomi Sound Outdoor lacks. It has an adjustable EQ, which the Xiaomi Sound Outdoor lacks. The tradeoff: Midrange peaks with rolled-off treble.
Buy the Xiaomi Sound Outdoor. It is rated higher for sound quality than the Boat Stone 350.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Xiaomi Sound Outdoor | Boat Stone 350 | |
|---|---|---|
| Price | $54.99 | - |
| Ranked | #45 of 157 in Medium Size Portable Bluetooth Speakers | #135 of 157 in Medium Size Portable Bluetooth Speakers |
| App | No | No |
| Battery Life | 12 hours (Manufacturer specified) | 6 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | No | Yes (multiple modes) |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Speakersync, up to 100 speakers) | - |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 1.3 lbs (597 g) | 0.9 lbs (426 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.4 | 5.0 |
| Dimensions | 7.7” x 2.7” x 2.6” (196.6 x 68 x 66 mm) | 3.5” x 7.1” (90 x 180 mm) |
| Drivers | 20W woofer, 10W tweeter + 2x passive radiators | 2x 20mm tweeters + 2x 45mm drivers |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 30W | 10W |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC (inferred; additional codecs unverified) |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | - | 87Hz |
| MicroSD Playback | - | Yes |
| Strap | - | No |
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Prices on this page were last checked October 2, 2026 at 10:18 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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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. A decent sounding speaker for its size.
Cons: Its 60Hz to 20kHz (Manufacturer specified) specification points to limited deep-bass reach for the cabinet size. There is no companion app. No EQ adjustment. Boosted bass that gets somewhat uncontrolled at high levels.
Full Xiaomi Sound Outdoor review and specifications →
| Amplifier Power | 30W |
|---|---|
| App | No |
| Aux Input | No |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| 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
- Head-to-Head Comparisons
- Xiaomi Sound Outdoor vs Tribit Stormbox Pro
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- Xiaomi Sound Outdoor vs Bose Soundlink Revolve+ II
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Boat Stone 350 eBay
Pros: 10W cylindrical stereo speaker with dual passive radiators, IPX7 water resistance, microSD card slot, and 3.5mm aux input. Measured bass extension of 87Hz (-10dB).
Cons: Midrange peaks with rolled-off treble. Bass extension limited below 87Hz.
Full Boat Stone 350 review and specifications →
| Amplifier Power | 10W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 87Hz |
| Battery Life | 6 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 3.5” x 7.1” (90 x 180 mm) |
| Drivers | 2x 20mm tweeters + 2x 45mm drivers |
| EQ | Yes (multiple modes) |
| IP Rating | IPX7 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 0.9 lbs (426 g) |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
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