Short answer: the Sony ULT Field 3 if sound quality matters most, the DBSONO X-Blast F37 if price matters most. The Sony ULT Field 3 ranks #64 of 150 medium speakers, rated 3.4/5, at $208. The DBSONO X-Blast F37 ranks #102, rated 2.8/5, at $69.99, $138.01 cheaper.
Why pick the Sony ULT Field 3: IP67 rated, dustproof and water resistant. Watch for: Sounds a bit hollow, a bit boosted in the treble.
Why pick the DBSONO X-Blast F37: 25W woofer + 10W tweeter + rear passive radiator. The tradeoff: Very recessed lower mids, peaky upper mids, just not a great frequency response overall.
Buy the Sony ULT Field 3 when sound quality outweighs the price for you, and the DBSONO X-Blast F37 when the price outweighs sound quality instead.
Battery life favors the Sony ULT Field 3: rated for 24 hours against 8 hours for the DBSONO X-Blast F37.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Sony ULT Field 3 | DBSONO X-Blast F37 | |
|---|---|---|
| Price | $208.00 | $69.99 |
| Ranked | #64 of 150 in Medium Size Portable Bluetooth Speakers | #102 of 150 in Medium Size Portable Bluetooth Speakers |
| App | Yes | - |
| Aux Input | No | No |
| Battery Life | 24 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.2 | 6.0 |
| Built-in Microphone | Yes | - |
| Dimensions | 10.1” x 4.4” x 3.1” (256 x 113 x 79 mm) | 8” x 2.5” x 3.6” (202 x 64 x 90.9 mm) |
| Drivers | 1x 20mm tweeter + 1x 86mm x 46mm woofer | 25W woofer, 10W tweeter, passive radiator |
| EQ | Yes (App + ULT button) | Yes (Bass Boost) |
| 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) | 1.7 lbs (771 g) |
| Amplifier Power | 27W | 35W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | - |
| Bass Extension (-10dB) | - | 49Hz |
| Frequency Response | - | 100Hz - 20kHz (Manufacturer specified) |
Related Speaker Comparisons
How Sony ULT Field 3 compares with other leading options:
- Sony ULT Field 3 vs Earfun Uboom L
- Soundcore Motion 300 vs Sony ULT Field 3
- Soundcore Motion+ vs Sony ULT Field 3
- Soundcore Boost “upgraded” 2021 vs Sony ULT Field 3
- Sony ULT Field 3 vs Minirig 4
Prices on this page were last checked September 30, 2026 at 2:57 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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The Two Speakers In Full
Sony ULT Field 3: $208.00 Amazon eBay
Older models: the Sony XB33 (ranked lower, rated 3.4/5), the Sony SRS-XE300 (ranked lower, rated 2.8/5) and the Sony SRS-XB30 (ranked lower, rated 2.6/5).
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 | Yes |
| 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 |
| Strap | Yes (detachable shoulder strap) |
| TWS | Yes |
| Weight | 2.6 lbs (1.2 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony ULT Field 3 vs Bose Soundlink Mini
- Sony ULT Field 3 vs Xiaomi Mi Portable
- Sony ULT Field 3 vs Sony XB33
- Sony ULT Field 3 vs Bose Soundlink Mini 2
- Sony ULT Field 3 vs Soundcore 3/Soundcore Select 2
- Sony ULT Field 3 vs Bose Portable Smart Speaker
- Sony ULT Field 3 vs Huawei Sound Joy 2
- Sony ULT Field 3 vs Turtlebox Ranger
- See all 138 comparisons
DBSONO X-Blast F37: $69.99 Amazon eBay
Pros: 25W woofer + 10W tweeter + rear passive radiator. Bluetooth 6.0 with a 30m range and TWS stereo pairing. IPX5 water resistance. Measured bass extension of 49Hz (-10dB).
Cons: Very recessed lower mids, peaky upper mids, just not a great frequency response overall.
Full DBSONO X-Blast F37 review and specifications →
| Amplifier Power | 35W |
|---|---|
| Aux Input | No |
| Bass Extension (-10dB) | 49Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 6.0 |
| Digital Aux Input | No |
| Dimensions | 8” x 2.5” x 3.6” (202 x 64 x 90.9 mm) |
| Drivers | 25W woofer, 10W tweeter, passive radiator |
| EQ | Yes (Bass Boost) |
| Frequency Response | 100Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX5 |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 1.7 lbs (771 g) |
- Reviews, Comparisons and Sound Samples
- Alan Ross - The Anti Shill!: DBSONO X-Blast F37 vs Bose Soundlink Flex 2 - They all want to be me 😊 More from alanrossreviews →
- Alan Ross - The Anti Shill!: DBSONO X-Blast F37 vs Tribit StormBox Flow - Cheap But Cheerful? 🙈
- Alan Ross - The Anti Shill!: DBsono X-Blast F37 is warmer than the Bahamas in a heatwave!
- Head-to-Head Comparisons
- DBSONO X-Blast F37 vs Sony SRS-XE300
- DBSONO X-Blast F37 vs Ultimate Ears Boom 4
- DBSONO X-Blast F37 vs Ultimate Ears Wonderboom 4
- DBSONO X-Blast F37 vs Marshall Emberton III
- DBSONO X-Blast F37 vs Marshall Emberton II
- DBSONO X-Blast F37 vs Soundcore 2
- DBSONO X-Blast F37 vs Tribit Stormbox 2
- DBSONO X-Blast F37 vs Sony ULT Field 1
- See all 36 comparisons