Short answer: the Tribit Stormbox Micro 3. It ranks #6 of 62 small speakers by sound quality, rated 4.2/5, at $49.98; the CMF Speaker S ranks #25, rated 3.4/5, at $49. With prices this close, go by the sound-quality ranking rather than the cost.
The case for the CMF Speaker S: A compact, IP68 waterproof speaker with a solid feel, real physical controls, and an 18 hour battery that held up in testing at about 17 hours at half volume. It links with other speakers (Auracast), which the Tribit Stormbox Micro 3 cannot. The catch: A single 10W driver limits bass impact and volume, so it suits a desk, bedroom, or close range listening outside rather than filling a larger room.
The Tribit Stormbox Micro 3 is the better-sounding, longer-running pick. A tough strap on mini speaker with full waterproofing, a 24 hour battery and a power bank output. It is rated for 24 hours of battery against 18 for the CMF Speaker S. Watch for: Bass is thuddy and distorted by default and needs EQ.
Buy the Tribit Stormbox Micro 3. It is rated higher for sound quality, and the $0.98 you would save on the CMF Speaker S does not close the gap.
Want more options? Browse the full Portable Bluetooth rankings.
A compact, IP68 waterproof speaker with a solid feel, real physical controls, and an 18 hour battery that held up in testing at about 17 hours at half volume.
A tough strap on mini speaker with full waterproofing, a 24 hour battery and a power bank output.
Prices on this page were last checked October 26, 2026 at 11:06 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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Specifications Side By Side
| CMF Speaker S | Tribit Stormbox Micro 3 | |
|---|---|---|
| Price | $49.00 | $49.98 |
| Ranked | #25 of 62 in Small Size Portable Bluetooth Speakers | #6 of 62 in Small Size Portable Bluetooth Speakers |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 6.0 | 6.0 |
| Bluetooth Codecs | SBC, AAC, LC3 (Auracast only) | AAC, SBC |
| IP Rating | IP68 | IP68 |
| Built-in Microphone | No | Yes |
| TWS | Yes (Stereo Mode) | Yes |
| App | Yes (Nothing X) | Yes |
| EQ | Yes (4 presets + custom) | Yes (9 Band) |
| Power Input | USB-C | USB-C |
| Aux Input | No | No |
| Digital Aux Input | Yes (USB-C audio) | No |
| Stereo | No | No |
| Omnidirectional | No | Pointing up |
| Power Bank | No | Yes (USB-C) |
| Party Mode | Yes (Auracast) | No |
| Lights | No | - |
| MicroSD Playback | No | - |
| Amplifier Power | 10W RMS | 13W |
| Frequency Response | 70Hz - 20kHz (Manufacturer specified) | - |
| Drivers | 1x 45mm full-range driver + 2x passive radiators | 48mm NdFeB driver with coaxial passive radiators |
| Battery Life | 18 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Charging Time | 2.5 hours | - |
| Weight | 0.7 lbs (334 g) | 0.7 lbs (330 g) |
| Dimensions | 5.1” x 3.3” x 1.7” (130.5 x 85 x 44 mm) | 4.4” x 4.2” x 1.8” (112 x 107.9 x 45 mm) |
| Strap | Yes (built-in loop) | Yes (built-in strap) |
| Bass Extension (-10dB) | - | 62Hz |
| Maximum SPL | - | 93dB (measured by Alan Ross Reviews) |
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