Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The Tribit Stormbox Micro 2 ranks #1 of 62 small speakers by sound quality at $35.39; the Ultimate Ears Wonderboom 4 ranks #109 of 179 medium speakers by sound quality at $64.99.
The Tribit Stormbox Micro 2 is the lighter pick. An excellent sounding small speaker, with surprisingly deep bass for its size and a strap that holds it on a bike or backpack. At 0.7 lbs (317 g) it weighs noticeably less than the Ultimate Ears Wonderboom 4 at 0.9 lbs (420 g). It has an adjustable EQ, which the Ultimate Ears Wonderboom 4 lacks. Watch for: Finicky phone charging, which doesn’t usually work.
Why pick the Ultimate Ears Wonderboom 4: A small, tough waterproof speaker with a strap loop and USB-C charging, easy to clip on a bag for outdoor trips. Watch for: Bass isn’t as deep as the top-ranked speakers and is a little thuddy.
Buy the Tribit Stormbox Micro 2 ($35.39) for a small speaker; the Ultimate Ears Wonderboom 4 ($64.99) suits a medium speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 11, 2026 at 3:26 AM 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Tribit Stormbox Micro 2 | Ultimate Ears Wonderboom 4 | |
|---|---|---|
| Price | $35.39 | $64.99 |
| Ranked | #1 of 62 in Small Size Portable Bluetooth Speakers | #109 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | No |
| Bass Extension (-10dB) | 65Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 14 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | No |
| EQ | Yes (9 Band) | No |
| IP Rating | IP67 | IP67 |
| Bluetooth Latency | 265ms | - |
| Maximum SPL | 94dB (measured by Alan Ross Reviews) | 87dB (Manufacturer specified) |
| Party Mode | No | No |
| Power Bank | Yes (but it doesn’t usually work; USB-C, 10W) | No |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Pointing up | Yes |
| TWS | Yes | Yes |
| Weight | 0.7 lbs (317 g) | 0.9 lbs (420 g) |
| Bluetooth Version | 5.3 | 5.2 |
| Amplifier Power | 10W | - |
| Dimensions | 3.9” x 3.9” x 1.7” (99.1 x 99.1 x 42.7 mm) | 4.1” x 3.8” (104 x 95.3 mm) |
| Drivers | 48mm NdFeB driver | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| Digital Aux Input | No | No |
| Strap | Yes (built-in strap) | Yes (built-in loop) |
Related Speaker Comparisons
More worthwhile head-to-heads for Tribit Stormbox Micro 2: