Short answer: the B&O Beosound A1 2nd gen. It ranks #11 of 177 medium speakers by sound quality, rated 4.3/5, at $395. The Ultimate Ears Megaboom 4 ranks #171, rated 2.1/5, at $200, $195 cheaper, not enough of a saving to outweigh the sound-quality gap.
Why pick the Ultimate Ears Megaboom 4: A tough waterproof speaker that floats, with USB-C charging, a long battery and PartyUp linking. Watch for: A lot of distortion at higher volumes.
The B&O Beosound A1 2nd gen is the better-sounding, lighter pick. A premium waterproof puck speaker with balanced sound, a built in strap, and a long battery for travel. At 1.2 lbs (558 g) it weighs much less than the Ultimate Ears Megaboom 4 at 2.4 lbs (1.1 kg). It supports aptX Adaptive Bluetooth, which the Ultimate Ears Megaboom 4 lacks.
Buy the B&O Beosound A1 2nd gen. It is rated higher for sound quality, and the $195 saving on the Ultimate Ears Megaboom 4 is not enough to make up the difference.
Want more options? Browse the full Portable Bluetooth rankings.
A tough waterproof speaker that floats, with USB-C charging, a long battery and PartyUp linking.
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 Megaboom 4 | B&O Beosound A1 2nd gen | |
|---|---|---|
| Price | $200 | $395.00 |
| Ranked | #171 of 177 in Medium Size Portable Bluetooth Speakers | #11 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 20 hours (Manufacturer specified) | 18 hours (Manufacturer specified) |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (PartyUp up to 50 speakers) | - |
| Stereo | No | No |
| Omnidirectional | Yes | Pointing up |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | 5.1 |
| Dimensions | 3.4” x 3.4” x 8.9” (87 x 87 x 225 mm) | 5.2”W x 5.2”D x 1.8”H (133 x 133 x 46 mm) |
| Drivers | 2x 50x50mm full-range + 2x 55x86mm passive radiators | 3.5mm aluminium driver + 0.75 inch silk dome tweeter |
| TWS | Yes | Yes |
| EQ | Yes (via app) | Yes |
| Power Input | USB-C | USB-C |
| Built-in Microphone | No | Yes |
| Weight | 2.4 lbs (1.1 kg) | 1.2 lbs (558 g) |
| Maximum SPL | 91dB (Manufacturer specified) | 93dB (measured by Alan Ross Reviews) |
| 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) |
| Bass Extension (-10dB) | - | 58Hz |
| Bluetooth Latency | - | 90ms |
| Power Bank | - | No |
| Amplifier Power | - | 60W total (2x 30W Class D) |
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