Short answer: the Bogasing G4. It ranks #27 of 177 medium speakers by sound quality, rated 4.0/5, at $42.49; the Sony ULT Field 3 ranks #71, rated 3.4/5, and costs $208, so there is little reason to consider the other one.
Why pick the Sony ULT Field 3: A rugged waterproof stereo speaker with long battery life, a detailed app EQ, a shoulder strap and a phone charging port. It supports LDAC Bluetooth, which the Bogasing G4 lacks. It links with other speakers (Party Connect up to 100 speakers), which the Bogasing G4 cannot. It has an adjustable EQ, which the Bogasing G4 lacks. The tradeoff: Sounds a bit hollow, a bit boosted in the treble.
The Bogasing G4 is the better-sounding, lighter choice. A light, affordable waterproof speaker with surprisingly strong bass for its size, solid loudness, long battery life and stereo pairing. At 1.8 lbs (830 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 upper treble is boosted and uneven, while the mids sit slightly behind the bass and highs, so it is not a neutral choice for vocal-focused music.
Buy the Bogasing G4. It is rated higher for sound quality than the Sony ULT Field 3 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 rugged waterproof stereo speaker with long battery life, a detailed app EQ, a shoulder strap and a phone charging port.
A light, affordable waterproof speaker with surprisingly strong bass for its size, solid loudness, long battery life and stereo pairing.
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Specifications Side By Side
| Sony ULT Field 3 | Bogasing G4 | |
|---|---|---|
| Price | $208.00 | $42.49 |
| Ranked | #71 of 177 in Medium Size Portable Bluetooth Speakers | #27 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | LE Audio with LC3 |
| Bluetooth Version | 5.2 | 5.3 |
| Built-in Microphone | Yes | - |
| Dimensions | 10.1” x 4.4” x 3.1” (256 x 113 x 79 mm) | 8.9”H x 2.5”W x 3.4”D (225 x 64 x 86 mm) |
| Drivers | 1x 20mm tweeter + 1x 86mm x 46mm woofer | Two drivers and passive radiators |
| EQ | Yes (App + ULT button) | No |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Party Connect up to 100 speakers) | No |
| Power Bank | Yes (USB-C, 5V/1.5A) | - |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 2.6 lbs (1.2 kg) | 1.8 lbs (0.83 kg) |
| Amplifier Power | 27W | 50W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | - |
| Aux Latency | - | 16ms |
| Bass Extension (-10dB) | - | 56Hz |
| Bluetooth Latency | - | 90ms |
| Maximum SPL | - | 100dB (measured by Alan Ross Reviews) |
| MicroSD Playback | - | Yes |
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