Short answer: the Xiaomi Sound Party. It ranks #20 of 177 medium speakers by sound quality, rated 4.1/5, at $149.99. The Sony ULT Field 1 ranks #99, rated 3.1/5, at $108, $41.99 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Xiaomi Sound Party is the better-sounding, longer-running choice. A versatile outdoor speaker with warm, balanced sound, fully waterproof build, long battery life, a phone charging port and a handy retractable handle. It is rated for 26 hours of battery against 12 for the Sony ULT Field 1. The tradeoff: The sound evidence is mixed rather than universally glowing.
The Sony ULT Field 1 is the lighter pick. A tough, waterproof small speaker that survives drops, with long real world battery life and stereo pairing. At 1.4 lbs (650 g) it weighs much less than the Xiaomi Sound Party at 2.6 lbs (1.2 kg). It supports AAC Bluetooth, which the Xiaomi Sound Party lacks. The tradeoff: Upper midrange peak, rolled off treble.
Buy the Xiaomi Sound Party. It is rated higher for sound quality, and the $41.99 you would save on the Sony ULT Field 1 does not close the gap.
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 tough, waterproof small speaker that survives drops, with long real world battery life and stereo pairing.
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 | Sony ULT Field 1 | |
|---|---|---|
| Price | $149.99 | $108.00 |
| Ranked | #20 of 177 in Medium Size Portable Bluetooth Speakers | #99 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Bass Extension (-10dB) | 54Hz | - |
| Battery Life | 26 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes | Yes |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Party Connect, up to 100 speakers) | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C, 5V/3A) | No |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Digital Aux Input | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | AAC, SBC |
| Bluetooth Version | 5.4 | 5.3 |
| Dimensions | 10” x 3.6” x 3.6” (255 x 92 x 92 mm) | 8.1” x 3” x 3” (206 x 77 x 76 mm) |
| Drivers | 2x 40mm woofers (35W total) + 2x 15mm tweeters | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Maximum SPL | 102dB (measured by Alan Ross Reviews) | - |
| Weight | 2.6 lbs (1200 g) | 1.4 lbs (650 g) |
| Amplifier Power | 50W | - |
| Power Input | USB-C (5V/3A, 9V/2A, 12V/2A) | USB-C |
| Lights | Yes | - |
| Strap | Yes (detachable strap) | Yes (detachable strap) |
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