Short answer: the Ultimate Ears Boom 4, though neither ranks well in its class. It ranks #93 of 144 medium speakers by sound quality (rated 2.9/5); the DBSONO X-Blast F37 ranks #96 (rated 2.8/5). Both are rated below 3.0/5 among the 144 medium speakers, and the Earfun Uboom L, ranked #1 at $49.79, is a better place to start if sound quality matters.
The case for the Ultimate Ears Boom 4: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. The catch: Not much improvement over the old ones.
What the DBSONO X-Blast F37 does well: 25W woofer + 10W tweeter + rear passive radiator. Watch for: Very recessed lower mids, peaky upper mids, just not a great frequency response overall.
Buy the Ultimate Ears Boom 4. It is rated higher for sound quality than the DBSONO X-Blast F37.
If battery life is a priority, the Ultimate Ears Boom 4 is rated for 15 hours versus 8 hours for the DBSONO X-Blast F37.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Ultimate Ears Boom 4 | DBSONO X-Blast F37 | |
|---|---|---|
| Price | $119.99 | - |
| Ranked | #93 of 144 in Medium Size Portable Bluetooth Speakers | #96 of 144 in Medium Size Portable Bluetooth Speakers |
| App | Yes | - |
| Battery Life | 15 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX5 |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| Weight | 1.4 lbs (620 g) | 1.7 lbs (771 g) |
| Bluetooth Version | 5.1 | 6.0 |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) | 8” x 2.5” x 3.6” (202 x 64 x 90.9 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators | 25W woofer, 10W tweeter, passive radiator |
| TWS | Yes | Yes |
| EQ | Yes (via app) | Yes (Bass Boost) |
| Built-in Microphone | No | - |
| Power Bank | No | - |
| Aux Input | No | No |
| Maximum SPL | 85dBC (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Strap | Yes (built-in loop) | - |
| Bass Extension (-10dB) | - | 49Hz |
| Frequency Response | - | 100Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | - | 35W |
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- Soundcore Boost “upgraded” 2021 vs Ultimate Ears Boom 4
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Prices on this page were last checked September 26, 2026 at 11:14 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
Ultimate Ears Boom 4: $119.99 Amazon eBay
Older model: the Ultimate Ears Boom 3 (rated 2.9/5).
Pros: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app.
Cons: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%
Full Ultimate Ears Boom 4 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 85dBC (Manufacturer specified) |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 1.4 lbs (620 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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DBSONO X-Blast F37 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 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!
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- DBSONO X-Blast F37 vs Tribit Stormbox 2
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