Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The Tribit Stormbox Micro 3 ranks #6 of 62 small speakers by sound quality at $56.76; the Ultimate Ears Boom 4 ranks #113 of 179 medium speakers by sound quality at $114.99.
The Tribit Stormbox Micro 3 is the longer-running, lighter choice. 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 15 for the Ultimate Ears Boom 4. At 0.7 lbs (330 g) it weighs much less than the Ultimate Ears Boom 4 at 1.4 lbs (620 g). It supports AAC Bluetooth, which the Ultimate Ears Boom 4 lacks. The catch: Bass is thuddy and distorted by default and needs EQ.
Why pick the Ultimate Ears Boom 4: A tough waterproof speaker that floats, with USB-C charging, app EQ and pairing with other UE speakers. It plays in stereo from a single unit, unlike the Tribit Stormbox Micro 3. Watch for: Not much improvement over the old ones.
Buy the Tribit Stormbox Micro 3 at $56.76 for a small speaker, or the Ultimate Ears Boom 4 at $114.99 for a medium speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 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
| Tribit Stormbox Micro 3 | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $56.76 | $114.99 |
| Ranked | #6 of 62 in Small Size Portable Bluetooth Speakers | #113 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Bass Extension (-10dB) | 62Hz | - |
| Battery Life | 24 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC |
| Built-in Microphone | Yes | No |
| EQ | Yes (9 Band) | Yes (via app) |
| IP Rating | IP68 | IP67 |
| Maximum SPL | 93dB (measured by Alan Ross Reviews) | 85dBC (Manufacturer specified) |
| Party Mode | No | - |
| Power Bank | Yes (USB-C) | No |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Pointing up | No |
| TWS | Yes | Yes |
| Weight | 0.7 lbs (330 g) | 1.4 lbs (620 g) |
| Bluetooth Version | 6.0 | 5.1 |
| Amplifier Power | 13W | - |
| Dimensions | 4.4” x 4.2” x 1.8” (112 x 107.9 x 45 mm) | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Drivers | 48mm NdFeB driver with coaxial passive radiators | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| Digital Aux Input | No | No |
| Strap | Yes (built-in strap) | Yes (built-in loop) |
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