Short answer: the EarFun Uboom L. It ranks #2 of 179 medium speakers by sound quality, rated 4.6/5, at $49.79; the Tribit Stormbox Flow ranks #58, rated 3.5/5, and costs $79.99, so there is little reason to consider the other one.
The EarFun Uboom L is the better-sounding pick. A great value medium speaker with clear, natural sound, waterproofing, and a Video Mode that keeps audio in sync with video. It keeps a wired aux input, which the Tribit Stormbox Flow lacks. It plays in stereo from a single unit, unlike the Tribit Stormbox Flow. Watch for: It cannot produce real low-bass rumble or fill a large, noisy space, and the top end loses some detail.
The Tribit Stormbox Flow is the deeper-bass, longer-running choice. A waterproof speaker with very long battery life, a carry handle, stereo pairing and a port that charges your phone. Its bass reaches about 47Hz before falling 10dB, against 56Hz for the EarFun Uboom L. It is rated for 30 hours of battery against 16 for the EarFun Uboom L. Watch for: Midrange and bass are weirdly recessed about 4db below 700Hz.
Buy the EarFun Uboom L. It is rated higher for sound quality than the Tribit Stormbox Flow and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Portable Bluetooth rankings.
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Specifications Side By Side
| EarFun Uboom L | Tribit Stormbox Flow | |
|---|---|---|
| Price | $49.79 after coupon UBOOMLWC | $79.99 |
| Ranked | #2 of 179 in Medium Size Portable Bluetooth Speakers | #58 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes (firmware >= 1.2.6) | Yes |
| Aux Input | Yes | No |
| Aux Latency | 216ms | - |
| Bass Extension (-10dB) | 56Hz | 47Hz |
| Battery Life | 16 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC, AAC |
| Built-in Microphone | Yes | - |
| EQ | Yes (10 band, firmware >= 1.2.6) | Yes |
| IP Rating | IP67 | IPX7 |
| Bluetooth Latency | 400ms normal / 66ms low latency mode | 400ms aac, 200ms sbc |
| Maximum SPL | 103dB (measured by Alan Ross Reviews) | - |
| Party Mode | No | - |
| Power Bank | No | - |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | Pointing up |
| TWS | Yes | Yes |
| Weight | 1.4 lbs (650 g) | 1.4 lbs (657 g) |
| Bluetooth Version | 5.0 | 5.3 |
| Dimensions | 3.1” x 8.3” x 2.8” (78 x 210 x 72 mm) | 7.9” x 3.6” x 2.1” (200 x 91 x 53 mm) |
| Drivers | 2x 55mm drivers + 2x passive radiators | 60W: 2x 30mm drivers + passive radiators |
| Amplifier Power | 28W | 25W |
| Digital Aux Input | No | No |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
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