Short answer: the Tribit Stormbox Flow. It ranks #55 of 150 medium speakers by sound quality, rated 3.5/5, at $79.99. The Ultimate Ears Wonderboom 4 ranks #95, rated 2.9/5, at $59.99, $20 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Ultimate Ears Wonderboom 4 is the lighter option. At 0.9 lbs (420 g) it weighs noticeably less than the Tribit Stormbox Flow at 1.4 lbs (657 g). The tradeoff: Bass isn’t as deep as the top-ranked speakers and is a little thuddy.
The Tribit Stormbox Flow is the better-sounding, longer-running pick. 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 14 for the Ultimate Ears Wonderboom 4. It supports AAC Bluetooth, which the Ultimate Ears Wonderboom 4 lacks. It has an adjustable EQ, which the Ultimate Ears Wonderboom 4 lacks. The tradeoff: Midrange and bass are weirdly recessed about 4db below 700Hz.
Buy the Tribit Stormbox Flow. It is rated higher for sound quality, and the $20 you would save on the Ultimate Ears Wonderboom 4 does not close the gap.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Ultimate Ears Wonderboom 4 | Tribit Stormbox Flow | |
|---|---|---|
| Price | $59.99 | $79.99 |
| Ranked | #95 of 150 in Medium Size Portable Bluetooth Speakers | #55 of 150 in Medium Size Portable Bluetooth Speakers |
| Battery Life | 14 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Maximum SPL | 87dB (Manufacturer specified) | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Yes | Pointing up |
| Weight | 0.9 lbs (420 g) | 1.4 lbs (657 g) |
| IP Rating | IP67 | IPX7 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.2 | 5.3 |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) | 7.9” x 3.6” x 2.1” (200 x 91 x 53 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) | 60W: 2x 30mm drivers + passive radiators |
| TWS | Yes | Yes |
| Party Mode | No | - |
| App | No | Yes |
| EQ | No | Yes |
| Built-in Microphone | No | - |
| Power Bank | No | - |
| Aux Input | No | No |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC, AAC |
| Strap | Yes (built-in loop) | - |
| Bass Extension (-10dB) | - | 47Hz |
| Bluetooth Latency | - | 400ms aac, 200ms sbc |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | - | 25W |
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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
Ultimate Ears Wonderboom 4: $59.99 Amazon eBay
Older models: the Ultimate Ears Wonderboom 3 (ranked lower, rated 2.9/5), the Ultimate Ears Wonderboom 2 (ranked lower, rated 2.9/5) and the Ultimate Ears Wonderboom (ranked lower, rated 2.9/5).
Pros: Small size.
Cons: Bass isn’t as deep as the top-ranked speakers and is a little thuddy. Not much improvement over the previous Ultimate Ears Wonderboom 3 besides the USB-C charging port.
Full Ultimate Ears Wonderboom 4 review and specifications →
| App | No |
|---|---|
| Aux Input | No |
| Battery Life | 14 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| EQ | No |
| IP Rating | IP67 |
| Maximum SPL | 87dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 0.9 lbs (420 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Tribit Stormbox Flow: $79.99 Tribit eBay
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 →
| 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
- Alan Ross Reviews: Tribit Stormbox Flow has deeper bass than the Bose Flex but……….. More from alanrossreviews →
- Alan Ross Reviews: Tribit Stormbox Flow firmware update 1.2.3 game changing moment in portable bluetooth history!
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- Oluv Patreon: Tribit Stormbox Flow - after firmware update More from Oluv’Sone →
- Oluv Patreon: Tribit Stormbox Flow - sound demo
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