Short answer: the Sound Party, and it costs less too. It ranks #71 of 179 medium speakers against the ULT Field 3’s #20, a 51 place gap, while costing $72.16 less.
The Sound Party measures more balanced across the board. Its pros describe it as sounding pretty balanced overall, more neutral than the JBL Charge 5, and note it plays clean out of the box, unlike the JBL Charge 6’s default tuning, which has noticeable mid distortion. Its own text even calls it one of the best-performing speakers for its price and size. The ULT Field 3, by contrast, has cons describing a hollow sound with boosted treble, plus a documented quirk where its custom EQ and ULT bass-boost button cannot run together, leaving bass very weak with ULT off.
The Sound Party is not flawless either. Its cons note bass can sound slightly thuddy at high volume with a 180Hz peak, and that both bass and treble are noticeably boosted by default, something neutral-sound listeners may want to EQ down. It also cannot match the Soundcore Boom 2 on raw bass output and loudness.
What the Sound Party adds:
- 50W of output power against the ULT Field 3’s 27W, plus a measured 54Hz bass extension.
- A slightly longer 26 hour battery life, versus 24 hours on the ULT Field 3.
- Multi-voltage USB-C power input, useful with higher-wattage chargers.
What the ULT Field 3 keeps: true stereo output and AAC/LDAC Bluetooth codec support, versus the Sound Party’s mono, SBC-only setup.
Buy the Sound Party for more balanced, cleaner-sounding output at a lower price, and expect to dial the EQ down slightly if you want it fully neutral.
Buy the ULT Field 3 only if stereo separation or LDAC codec support specifically matter to you more than overall tonal balance.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 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 3 | Xiaomi Sound Party | |
|---|---|---|
| Price | $208.00 | $135.84 |
| Ranked | #71 of 179 in Medium Size Portable Bluetooth Speakers | #20 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Battery Life | 24 hours (Manufacturer specified) | 26 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC |
| Bluetooth Version | 5.2 | 5.4 |
| Built-in Microphone | Yes | Yes |
| Dimensions | 10.1” x 4.4” x 3.1” (256 x 113 x 79 mm) | 10” x 3.6” x 3.6” (255 x 92 x 92 mm) |
| Drivers | 1x 20mm tweeter + 1x 86mm x 46mm woofer | 2x 40mm woofers (35W total) + 2x 15mm tweeters |
| EQ | Yes (App + ULT button) | 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/1.5A) | Yes (USB-C, 5V/3A) |
| Power Input | USB-C | USB-C (5V/3A, 9V/2A, 12V/2A) |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 2.6 lbs (1.2 kg) | 2.6 lbs (1200 g) |
| Amplifier Power | 27W | 50W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | Yes (detachable strap) |
| Bass Extension (-10dB) | - | 54Hz |
| Frequency Response | - | 60Hz - 20kHz (Manufacturer specified) |
| Maximum SPL | - | 102dB (measured by Alan Ross Reviews) |
| Lights | - | Yes |
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