Short answer: the B&O Beosound A1 2nd gen for better sound quality, the Ultimate Ears Wonderboom 2 for the lower price. The B&O Beosound A1 2nd gen ranks #11 of 177 medium speakers, rated 4.3/5, at $395. The Ultimate Ears Wonderboom 2 ranks #110, rated 2.9/5, at $80, $315 cheaper.
The Ultimate Ears Wonderboom 2 is the lighter option. A small waterproof speaker that floats and is light enough to toss in a bag for the pool or beach. At 0.9 lbs (420 g) it weighs noticeably less than the B&O Beosound A1 2nd gen at 1.2 lbs (558 g). The catch: Not stereo, barely any bass, recessed treble.
The B&O Beosound A1 2nd gen is the better-sounding, deeper-bass choice. A premium waterproof puck speaker with balanced sound, a built in strap, and a long battery for travel. Its bass reaches about 58Hz before falling 10dB, against 82Hz for the Ultimate Ears Wonderboom 2. Alan Ross Reviews measured it at 93dB at full volume, against 88dB for the Ultimate Ears Wonderboom 2. It is rated for 18 hours of battery against 12 for the Ultimate Ears Wonderboom 2.
Buy the Ultimate Ears Wonderboom 2 when the price outweighs sound quality for you, and the B&O Beosound A1 2nd gen when sound quality outweighs the price instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A small waterproof speaker that floats and is light enough to toss in a bag for the pool or beach.
A premium waterproof puck speaker with balanced sound, a built in strap, and a long battery for travel.
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 2 | B&O Beosound A1 2nd gen | |
|---|---|---|
| Price | $80 | $395.00 |
| Ranked | #110 of 177 in Medium Size Portable Bluetooth Speakers | #11 of 177 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 82Hz | 58Hz |
| Battery Life | 12 hours (Manufacturer specified) | 18 hours (Manufacturer specified) |
| Maximum SPL | 88dB (measured by Alan Ross Reviews) | 93dB (measured by Alan Ross Reviews) |
| Power Input | Micro USB | 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 | 5.1 | 5.1 |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) | 5.2”W x 5.2”D x 1.8”H (133 x 133 x 46 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators | 3.5mm aluminium driver + 0.75 inch silk dome tweeter |
| TWS | Yes | Yes |
| Party Mode | No | - |
| App | No | Yes |
| EQ | No | Yes |
| Built-in Microphone | No | Yes |
| Digital Aux Input | No | Yes (USB-C) |
| Bluetooth Codecs | SBC | SBC, AAC, aptX Adaptive |
| Aux Input | No | No |
| Strap | Yes (built-in loop) | Yes (built-in strap) |
| Bluetooth Latency | - | 90ms |
| Power Bank | - | No |
| Amplifier Power | - | 60W total (2x 30W Class D) |
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