Short answer: the Bogasing G4. It ranks #25 of 142 medium speakers by sound quality at $38.29; the Sony ULT Field 3 ranks #60 and costs $138, so there is little reason to consider the other one.
What the Sony ULT Field 3 offers: IP67 rated, dustproof and water resistant. 24 hour battery life. App with 10-band EQ. Party Connect with up to 100 speakers. USB-C in/out for charging your phone. Watch for: Sounds a bit hollow, a bit boosted in the treble. Custom EQ and the ULT bass-boost button can’t be used together - turning on ULT disables the EQ. Bass is very weak with ULT off. Lost to the JBL Charge 6 in a side-by-side comparison despite being the larger speaker.
What the Bogasing G4 offers: A 0.83kg travel-friendly speaker with 50W output, IPX7 protection, USB-C charging, aux and microSD playback, LC3 Bluetooth and TWS pairing. It reaches a useful 100dB maximum level and has a measured 56Hz -10dB bass point, giving it more low-end presence than many speakers of this size. 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. It has no app or user EQ, and its Super Bass and Vocal modes offer little practical differentiation according to listening tests.
Buy the Bogasing G4. It ranks higher for sound quality than the Sony ULT Field 3 and costs less, which settles it without a real tradeoff to make.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Sony ULT Field 3 | Bogasing G4 | |
|---|---|---|
| Price | $138.00 | $38.29 |
| Ranked | #60 of 142 in Medium Size Portable Bluetooth Speakers | #25 of 142 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| 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) | - |
| 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 |
| Aux Latency | - | 16ms |
| Bass Extension (-10dB) | - | 56Hz |
| Bluetooth Latency | - | 90ms |
| Maximum SPL | - | 100dB (measured by Alan Ross Reviews) |
| MicroSD Playback | - | Yes |
Related Speaker Comparisons
More worthwhile head-to-heads for Bogasing G4:
- Bogasing G4 vs Earfun Uboom L
- Bogasing G4 vs Soundcore Motion 300
- Bogasing G4 vs Soundcore Motion+
- Bogasing G4 vs Minirig 4
- B&O Beosound A1 2nd gen vs Bogasing G4
Prices on this page were last checked September 16, 2026 at 12:41 AM 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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The Two Speakers In Full
Sony ULT Field 3: $138.00 Amazon eBay
Pros: IP67 rated, dustproof and water resistant. 24 hour battery life. App with 10-band EQ. Party Connect with up to 100 speakers. USB-C in/out for charging your phone.
Cons: Sounds a bit hollow, a bit boosted in the treble. Custom EQ and the ULT bass-boost button can’t be used together - turning on ULT disables the EQ. Bass is very weak with ULT off. Lost to the JBL Charge 6 in a side-by-side comparison despite being the larger speaker.
Full Sony ULT Field 3 review and specifications →
| Amplifier Power | 27W |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 10.1" x 4.4" x 3.1" (256 x 113 x 79 mm) |
| Drivers | 1x 20mm tweeter + 1x 86mm x 46mm woofer |
| EQ | Yes (App + ULT button) |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C, 5V/1.5A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 2.6 lbs (1.2 kg) |
- Links
- Reviews, Comparisons and Sound Samples
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Bogasing G4: $38.29 Amazon eBay
Pros: A 0.83kg travel-friendly speaker with 50W output, IPX7 protection, USB-C charging, aux and microSD playback, LC3 Bluetooth and TWS pairing. It reaches a useful 100dB maximum level and has a measured 56Hz -10dB bass point, giving it more low-end presence than many speakers of this size. Measured bass extension of 56Hz (-10dB).
Cons: 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. It has no app or user EQ, and its Super Bass and Vocal modes offer little practical differentiation according to listening tests.
Full Bogasing G4 review and specifications →
| Amplifier Power | 50W |
|---|---|
| App | No |
| Aux Input | Yes |
| Aux Latency | 16ms |
| Bass Extension (-10dB) | 56Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | LE Audio with LC3 |
| Bluetooth Latency | 90ms |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Drivers | Two drivers and passive radiators |
| EQ | No |
| IP Rating | IPX7 |
| Maximum SPL | 100dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.8 lbs (0.83 kg) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons