Short answer: the Sony ULT Field 3. It ranks #71 of 177 medium speakers by sound quality (rated 3.4/5) at $208 and is still sold new; the Xdobo X8 ranks #158 (rated 2.3/5) and is discontinued, so it is only an option used.
The Sony ULT Field 3 is the better-sounding, longer-running choice. A rugged waterproof stereo speaker with long battery life, a detailed app EQ, a shoulder strap and a phone charging port. It is rated for 24 hours of battery against 15 for the Xdobo X8. It is rated IP67 against IPX5 for the Xdobo X8. It plays in stereo from a single unit, unlike the Xdobo X8. Watch for: Sounds a bit hollow, a bit boosted in the treble.
The Xdobo X8 is the lighter choice. A cheap splash resistant speaker that plays loud for background music outdoors, with aux and microSD playback. At 1.9 lbs (860 g) it weighs noticeably less than the Sony ULT Field 3 at 2.6 lbs (1.2 kg). It keeps a wired aux input, which the Sony ULT Field 3 lacks. Watch for: The single full-range driver is the limitation.
Buy the Sony ULT Field 3. It is rated higher for sound quality; the Xdobo X8 is no longer sold new.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A rugged waterproof stereo speaker with long battery life, a detailed app EQ, a shoulder strap and a phone charging port.
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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Sony ULT Field 3 | Xdobo X8 | |
|---|---|---|
| Price | $208.00 | $35 Discontinued |
| Ranked | #71 of 177 in Medium Size Portable Bluetooth Speakers | #158 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.2 | 5.0 |
| Built-in Microphone | Yes | Yes |
| Dimensions | 10.1” x 4.4” x 3.1” (256 x 113 x 79 mm) | 8.7” x 3.7” x 2.8” (220 x 95 x 72 mm) |
| Drivers | 1x 20mm tweeter + 1x 86mm x 46mm woofer | 66mm full-range driver |
| EQ | Yes (App + ULT button) | Yes (multiple modes) |
| IP Rating | IP67 | IPX5 |
| Party Mode | Yes (Party Connect up to 100 speakers) | - |
| Power Bank | Yes (USB-C, 5V/1.5A) | - |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 2.6 lbs (1.2 kg) | 1.9 lbs (860 g) |
| Amplifier Power | 27W | 60W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | - |
| Bass Extension (-10dB) | - | ~65Hz |
| MicroSD Playback | - | Yes |
Related Speaker Comparisons
How Sony ULT Field 3 compares with other leading options: