Short answer: the Ultimate Ears Boom 4 on measured sound quality, the Dayton Audio Boost on price, though neither ranks well in its class. The Ultimate Ears Boom 4 ranks #113 of 179 medium speakers, rated 2.9/5, at $114.99. The Dayton Audio Boost ranks #153, rated 2.4/5, at $29.98, $85.01 cheaper. Both are rated below 3.0/5 among the 179 medium speakers, so if sound quality matters, consider the EarFun Uboom L instead, ranked #2 at $49.79.
The Ultimate Ears Boom 4 is the better-sounding, longer-running option. A tough waterproof speaker that floats, with USB-C charging, app EQ and pairing with other UE speakers. It is rated for 15 hours of battery against 6 for the Dayton Audio Boost. It has an adjustable EQ, which the Dayton Audio Boost lacks. The catch: Not much improvement over the old ones.
The Dayton Audio Boost is the lighter choice. A small, cheap soda can sized waterproof speaker with stereo pairing, microSD playback and an aux input. At 0.9 lbs (426 g) it weighs noticeably less than the Ultimate Ears Boom 4 at 1.4 lbs (620 g). It keeps a wired aux input, which the Ultimate Ears Boom 4 lacks. The catch: Some midrange peaks, treble slightly rolled off.
Buy the Ultimate Ears Boom 4 if sound quality matters more than the price. Buy the Dayton Audio Boost if the price matters more than sound quality.
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
| Ultimate Ears Boom 4 | Dayton Audio Boost | |
|---|---|---|
| Price | $114.99 | $29.98 |
| Ranked | #113 of 179 in Medium Size Portable Bluetooth Speakers | #153 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Battery Life | 15 hours (Manufacturer specified) | 6 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX7 |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Weight | 1.4 lbs (620 g) | 0.9 lbs (426 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | 5.0 |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) | 3.5” x 3.5” x 4.3” (88.9 x 88.9 x 109.2 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators | 2x 1.5” full-range drivers + 2x passive radiators |
| TWS | Yes | Yes |
| EQ | Yes (via app) | No |
| Built-in Microphone | No | No |
| Power Bank | No | - |
| Aux Input | No | Yes |
| Maximum SPL | 85dBC (Manufacturer specified) | - |
| 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 |
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