Short answer: the Tribit Stormbox Flow. It ranks #55 of 150 medium speakers by sound quality, rated 3.5/5, at $79.99; the Sony XB33 ranks #66, rated 3.4/5, and costs $110, so there is little reason to consider the other one.
The case for the Tribit Stormbox Flow: Up to 30 hours of battery life: roughly double most rivals (~20-24 hrs with XBass on). The catch: Not stereo.
The case for the Sony XB33: IP67 rated and lightweight (2.4 lb). The catch: Not very loud.
One note: the Sony XB33 is discontinued, but it still ranks #66 of 150 medium speakers by sound quality, ahead of most of what is still sold new, so it is worth considering used.
Buy the Tribit Stormbox Flow. It is rated higher for sound quality than the Sony XB33 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Tribit Stormbox Flow | Sony XB33 | |
|---|---|---|
| Price | $79.99 | $110 Discontinued |
| Ranked | #55 of 150 in Medium Size Portable Bluetooth Speakers | #66 of 150 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (Sony Music Connect App) |
| Bass Extension (-10dB) | 47Hz | 50Hz |
| Battery Life | 30 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| EQ | Yes | Yes (3 band) |
| Bluetooth Latency | 400ms aac, 200ms sbc | 110ms |
| Stereo | No | Yes |
| Omnidirectional | Pointing up | No |
| Weight | 1.4 lbs (657 g) | 2.4 lbs (1.1 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.0 |
| Dimensions | 7.9” x 3.6” x 2.1” (200 x 91 x 53 mm) | 9.7” x 3.8” x 4.2” (246 x 97 x 106 mm) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 25W | 16W RMS |
| Drivers | 60W: 2x 30mm drivers + passive radiators | 2x 48x70mm X-Balanced racetrack drivers + 2x passive radiators |
| IP Rating | IPX7 | IP67 |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC, AAC | SBC, AAC, LDAC |
| Aux Input | No | No |
| TWS | Yes | Yes |
| Power Input | USB-C | USB-C |
| Maximum SPL | - | 97dB (measured by Alan Ross Reviews) |
| Party Mode | - | Yes (Party Connect up to 100 speakers) |
| Power Bank | - | Yes (USB-A) |
| Lights | - | Yes |
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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
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!
- Alan Ross Reviews: Tribit Stormbox Flow firmware update 1.2.5 - stuff gets fixed ✔
- 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
- Oluv Patreon: Tribit Stormbox Flow - after firmware update More from Oluv’Sone →
- Oluv Patreon: Tribit Stormbox Flow - sound demo
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Sony XB33: $110 Discontinued eBay
Newer model: the Sony ULT Field 3, ranked higher, rated 3.4/5.
Pros: IP67 rated and lightweight (2.4 lb). App-controlled color LED lighting, Party Connect links up to 100 speakers. ~19 hour real-world battery without lights. Measured bass extension of 50Hz (-10dB).
Cons: Not very loud. Upper bass peaks, midrange dip, upper midrange peaks, not very neutral. Speaker will not remain at max volume and will turn itself down automatically. Discontinued.
Full Sony XB33 review and specifications →
| Amplifier Power | 16W RMS |
|---|---|
| App | Yes (Sony Music Connect App) |
| Aux Input | No |
| Bass Extension (-10dB) | 50Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Latency | 110ms |
| Bluetooth Version | 5.0 |
| Digital Aux Input | No |
| Dimensions | 9.7” x 3.8” x 4.2” (246 x 97 x 106 mm) |
| Drivers | 2x 48x70mm X-Balanced racetrack drivers + 2x passive radiators |
| EQ | Yes (3 band) |
| IP Rating | IP67 |
| Lights | Yes |
| Maximum SPL | 97dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 2.4 lbs (1.1 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Sony xb33 vs xb43 vs Soundcore Motion Plus speakers test More from alanrossreviews →
- Alan Ross Reviews: JBL Charge 5 vs Motion Plus and Sony XB33 - ultimate travel speaker 2021 🤗
- GYMCADDY: Sony XE300 Review And Compared to Sony XB33 - A Muffled Mess More from GYMCADDY →
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