Short answer: the Tribit Stormbox Flow. It ranks #62 of 175 medium speakers by sound quality, rated 3.5/5, at $79.99; the Ultimate Ears Boom 4 ranks #113, rated 2.9/5, and costs $129.99, so there is little reason to consider the other one.
The Tribit Stormbox Flow is the better-sounding, longer-running choice. Up to 30 hours of battery life: roughly double most rivals (~20-24 hrs with XBass on). It is rated for 30 hours of battery against 15 for the Ultimate Ears Boom 4. It supports AAC Bluetooth, which the Ultimate Ears Boom 4 lacks. The catch: Midrange and bass are weirdly recessed about 4db below 700Hz.
What the Ultimate Ears Boom 4 does well: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. It plays in stereo from a single unit, unlike the Tribit Stormbox Flow. The catch: Not much improvement over the old ones.
Buy the Tribit Stormbox Flow. It is rated higher for sound quality than the Ultimate Ears Boom 4 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Tribit Stormbox Flow | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $79.99 | $129.99 |
| Ranked | #62 of 175 in Medium Size Portable Bluetooth Speakers | #113 of 175 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Bass Extension (-10dB) | 47Hz | - |
| Battery Life | 30 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| EQ | Yes | Yes (via app) |
| Bluetooth Latency | 400ms aac, 200ms sbc | - |
| Stereo | No | Yes |
| Omnidirectional | Pointing up | No |
| Weight | 1.4 lbs (657 g) | 1.4 lbs (620 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.1 |
| Dimensions | 7.9” x 3.6” x 2.1” (200 x 91 x 53 mm) | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 25W | - |
| Drivers | 60W: 2x 30mm drivers + passive radiators | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| IP Rating | IPX7 | IP67 |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC, AAC | SBC |
| Aux Input | No | No |
| TWS | Yes | Yes |
| Power Input | USB-C | USB-C |
| Built-in Microphone | - | No |
| Power Bank | - | No |
| Maximum SPL | - | 85dBC (Manufacturer specified) |
| Strap | - | Yes (built-in loop) |
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Prices on this page were last checked October 12, 2026 at 4:13 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
Tribit Stormbox Flow: $79.99 Tribit $79.99 eBay
Same family: the Tribit Stormbox Micro 2 (smaller model, rated 4.5/5), the Tribit Stormbox Pro (larger model, ranked higher, rated 3.7/5) and the Tribit Stormbox Blast (larger model, rated 4.5/5). See every Tribit Stormbox generation.
Pros: Up to 30 hours of battery life: roughly double most rivals (~20-24 hrs with XBass on). IP67 rated with a loose handle for carrying/hanging. Pairs with a second Flow for stereo; USB-C port charges your phone too. Measured bass extension of 47Hz (-10dB).
Cons: Not stereo. Midrange and bass are weirdly recessed about 4db below 700Hz. You need xbass mode for it to not sound like a clock radio with missing bass. You also can’t turn up the bass enough in the custom EQ modes to get it neutral, so it will sound bass light. Firmware 1.2.3 fixes the distortion issues with xbass mode on, but bass still sounds wobbly and uncontrolled.
Full Tribit Stormbox Flow review and specifications →
| Released | Oct 2023 (3 years ago) |
|---|---|
| Amplifier Power | 25W |
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 47Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC |
| Bluetooth Latency | 400ms aac, 200ms sbc |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 7.9” x 3.6” x 2.1” (200 x 91 x 53 mm) |
| Drivers | 60W: 2x 30mm drivers + passive radiators |
| EQ | Yes |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Omnidirectional | Pointing up |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 1.4 lbs (657 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Oluv Patreon: Tribit Stormbox Flow - after firmware update More from Oluv’Sone →
- Oluv Patreon: Tribit Stormbox Flow - sound demo
- Alan Ross Reviews: Tribit Stormbox Flow firmware update 1.2.3 game changing moment in portable bluetooth history! More from alanrossreviews →
- Alan Ross Reviews: Tribit Stormbox Flow firmware update 1.2.5 - stuff gets fixed ✔
- Alan Ross - The Anti Shill!: DBSONO X-Blast F37 vs Tribit StormBox Flow - Cheap But Cheerful? 🙈
- Alan Ross Reviews: Tribit Stormbox Flow has deeper bass than the Bose Flex but………..
- Jay’s Straight Up Reviews & More: Tribit Stormbox Flow vs XSound Mega - Sound Comparison, Stock EQ, Both Mono Sound 😶🌫️ A Family Feud More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: Tribit Stormbox Flow vs Soundcore Motion 300 (LDAC) 😵 Budget Bose Soundlink Flex "Inspired" Speakers
- Head-to-Head Comparisons
- Tribit Stormbox Flow vs JBL Charge 4
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- See all 90 comparisons
Ultimate Ears Boom 4: $129.99 Amazon $129.99 eBay
Older model: the Ultimate Ears Boom 3 (ranked lower, rated 2.9/5). See every Ultimate Ears Wonderboom, Boom and Megaboom generation.
Same family: the Ultimate Ears Wonderboom 4 (smaller model, ranked higher, rated 2.9/5) and the Ultimate Ears Megaboom 4 (larger model, ranked lower, rated 2.1/5).
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 →
| Released | Jun 2024 (2 years ago) |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| 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
- Ultimate Ears Boom 4 vs Ultimate Ears Boom 3
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom
- Ultimate Ears Boom 4 vs Klipsch Groove
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 2
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 3
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 4
- Ultimate Ears Boom 4 vs DBSONO X-Blast F37
- Ultimate Ears Boom 4 vs Sony SRS-XE300
- See all 139 comparisons