Short answer: the B&O Beosound A1 3rd gen on measured sound quality, the Ultimate Ears Wonderboom 4 on price. The B&O Beosound A1 3rd gen ranks #19 of 177 medium speakers, rated 4.1/5, at $399. The Ultimate Ears Wonderboom 4 ranks #108, rated 2.9/5, at $64.99, $334.01 cheaper.
The Ultimate Ears Wonderboom 4 is the lighter option. A small, tough waterproof speaker with a strap loop and USB-C charging, easy to clip on a bag for outdoor trips. At 0.9 lbs (420 g) it weighs noticeably less than the B&O Beosound A1 3rd gen at 1.2 lbs (558 g). The tradeoff: Bass isn’t as deep as the top-ranked speakers and is a little thuddy.
The B&O Beosound A1 3rd gen is the better-sounding, longer-running pick. A premium waterproof puck speaker with good sound, a long battery, and a battery you can swap, built to last. It is rated for 24 hours of battery against 14 for the Ultimate Ears Wonderboom 4. It supports aptX Adaptive Bluetooth, which the Ultimate Ears Wonderboom 4 lacks. It has an adjustable EQ, which the Ultimate Ears Wonderboom 4 lacks. The catch: Distorts easier than the 2nd gen with deeper bass.
Buy the Ultimate Ears Wonderboom 4 if the price matters more than sound quality. Buy the B&O Beosound A1 3rd gen if sound quality matters more than the price.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A small, tough waterproof speaker with a strap loop and USB-C charging, easy to clip on a bag for outdoor trips.
A premium waterproof puck speaker with good sound, a long battery, and a battery you can swap, built to last.
Prices on this page were last checked October 31, 2026 at 7:11 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 Wonderboom 4 | B&O Beosound A1 3rd gen | |
|---|---|---|
| Price | $64.99 | $399.00 |
| Ranked | #108 of 177 in Medium Size Portable Bluetooth Speakers | #19 of 177 in Medium Size Portable Bluetooth Speakers |
| Battery Life | 14 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Maximum SPL | 87dB (Manufacturer specified) | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Yes | Pointing up |
| Weight | 0.9 lbs (420 g) | 1.2 lbs (558 g) |
| IP Rating | IP67 | IP67 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.2 | 5.1 |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) | 5.2” x 1.8” x 5.2” (133 x 46 x 133 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) | 82.5mm woofer, 15mm tweeter |
| TWS | Yes | Yes |
| Party Mode | No | - |
| App | No | Yes |
| EQ | No | Yes |
| Built-in Microphone | No | Yes |
| Power Bank | No | No |
| Aux Input | No | No |
| Digital Aux Input | No | Yes (USB-C) |
| Bluetooth Codecs | SBC | SBC, AAC, aptX Adaptive |
| Strap | Yes (built-in loop) | Yes (built-in strap) |
| Amplifier Power | - | 60W |
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