Short answer: the Xiaomi Sound Outdoor. It ranks #46 of 177 medium speakers by sound quality, rated 3.7/5, at $49.99; the Sony ULT Field 1 ranks #99, rated 3.1/5, and costs $108, so there is not much of a tradeoff to weigh.
The Xiaomi Sound Outdoor gets the sound right for much less money. A woofer, tweeter and two passive radiators on 30W make it a decent-sounding small speaker. Bass is boosted and gets loose at high volume. It is rated IP67 and links with other Xiaomi speakers, but it has no app or EQ.
The ULT Field 1 is the better-supported speaker, with a sound flaw. It survives drops and 1m submersion, owners see 28 hours or more with the ULT bass mode off, and it has an app, EQ, AAC and stereo pairing with a second unit. Its upper midrange has a peak and its treble is rolled off, which costs it clarity next to the Xiaomi.
Buy the Xiaomi Sound Outdoor. It is rated higher for sound quality than the Sony ULT Field 1 and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Portable Bluetooth rankings.
A tough, waterproof small speaker that survives drops, with long real world battery life and stereo pairing.
An affordable waterproof outdoor speaker with a separate tweeter, decent battery life and linking to many more 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
| Sony ULT Field 1 | Xiaomi Sound Outdoor | |
|---|---|---|
| Price | $108.00 | $49.99 |
| Ranked | #99 of 177 in Medium Size Portable Bluetooth Speakers | #46 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | No |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes | No |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Party Connect up to 100 speakers) | Yes (Speakersync, up to 100 speakers) |
| Power Bank | No | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 1.4 lbs (650 g) | 1.3 lbs (597 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.3 | 5.4 |
| Dimensions | 8.1” x 3” x 3” (206 x 77 x 76 mm) | 7.7” x 2.7” x 2.6” (196.6 x 68 x 66 mm) |
| Drivers | 83mm x 42mm woofer, 16mm tweeter + passive radiator | 20W woofer, 10W tweeter + 2x passive radiators |
| Digital Aux Input | No | No |
| Strap | Yes (detachable strap) | - |
| Frequency Response | - | 60Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | - | 30W |
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