Short answer: the Ultimate Ears Wonderboom 4, though neither ranks well in its class. It ranks #109 of 179 medium speakers by sound quality, rated 2.9/5, at $64.99. The Dayton Audio Boost ranks #153, rated 2.4/5, at $29.98, $35.01 cheaper, a saving that is not big enough to make up the sound-quality gap. Both are rated below 3.0/5 among the 179 medium speakers, and the EarFun Uboom L, ranked #2 at $49.79, is a better place to start if sound quality matters.
The Ultimate Ears Wonderboom 4 is the better-sounding, longer-running option. A small, tough waterproof speaker with a strap loop and USB-C charging, easy to clip on a bag for outdoor trips. It is rated for 14 hours of battery against 6 for the Dayton Audio Boost. Watch for: Bass isn’t as deep as the top-ranked speakers and is a little thuddy.
What the Dayton Audio Boost does well: A small, cheap soda can sized waterproof speaker with stereo pairing, microSD playback and an aux input. It keeps a wired aux input, which the Ultimate Ears Wonderboom 4 lacks. It plays in stereo from a single unit, unlike the Ultimate Ears Wonderboom 4. The catch: Some midrange peaks, treble slightly rolled off.
Buy the Ultimate Ears Wonderboom 4. It is rated higher for sound quality, and saving $35.01 with the Dayton Audio Boost does not make up for the sound-quality gap.
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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Ultimate Ears Wonderboom 4 | Dayton Audio Boost | |
|---|---|---|
| Price | $64.99 | $29.98 |
| Ranked | #109 of 179 in Medium Size Portable Bluetooth Speakers | #153 of 179 in Medium Size Portable Bluetooth Speakers |
| Battery Life | 14 hours (Manufacturer specified) | 6 hours (Manufacturer specified) |
| Maximum SPL | 87dB (Manufacturer specified) | - |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Yes | No |
| Weight | 0.9 lbs (420 g) | 0.9 lbs (426 g) |
| IP Rating | IP67 | IPX7 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.2 | 5.0 |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) | 3.5” x 3.5” x 4.3” (88.9 x 88.9 x 109.2 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) | 2x 1.5” full-range drivers + 2x passive radiators |
| TWS | Yes | Yes |
| Party Mode | No | - |
| App | No | No |
| EQ | No | No |
| Built-in Microphone | No | No |
| Power Bank | No | - |
| Aux Input | No | Yes |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Strap | Yes (built-in loop) | - |
| Amplifier Power | - | 70W RMS |
| Bass Extension (-10dB) | - | 87Hz |
| MicroSD Playback | - | Yes |
Related Speaker Comparisons
More top alternatives to Ultimate Ears Wonderboom 4: