Short answer: the B&O Beosound A1 2nd gen on measured sound quality, the Ultimate Ears Megaboom 4 on price. The B&O Beosound A1 2nd gen ranks #10 of 142 medium speakers at $395. The Ultimate Ears Megaboom 4 ranks #137 at $200, $195 cheaper.
What the Ultimate Ears Megaboom 4 offers: IP67 rated, floats, and finally uses USB-C charging. 20 hour battery life. ‘PartyUp’ feature syncs multiple UE speakers together. Watch for: A lot of distortion at higher volumes. Rolled off treble. Not very loud. They really screwed this up
What the B&O Beosound A1 2nd gen offers: B&O Beosound A1 2nd gen uses 3.5mm aluminium driver + 0.75 inch silk dome tweeter. Its 558 g, claimed 18 hours (Manufacturer specified) battery life, IP67 protection, up to 93dB and mono playback make it a practical option for its intended room or portable use. Watch for: Bass is limited by its 58Hz specification.
Buy the Ultimate Ears Megaboom 4 if the price is the priority over sound quality, or the B&O Beosound A1 2nd gen if sound quality is the priority over the price.
Skip the Ultimate Ears Megaboom 4 if sound quality matters to you. It ranks near the bottom of the 142 medium speakers.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Ultimate Ears Megaboom 4 | B&O Beosound A1 2nd gen | |
|---|---|---|
| Price | $200 | $395.00 |
| Ranked | #137 of 142 in Medium Size Portable Bluetooth Speakers | #10 of 142 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 Version | 5.1 | - |
| Dimensions | 3.4" x 3.4" x 8.9" (87 x 87 x 225 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 |
| Bass Extension (-10dB) | - | 58Hz |
| Bluetooth Latency | - | 90ms |
| Power Bank | - | No |
Related Speaker Comparisons
How B&O Beosound A1 2nd gen compares with other leading options:
- Earfun Uboom L vs B&O Beosound A1 2nd gen
- B&O Beosound A1 2nd gen vs Soundcore Motion 300
- B&O Beosound A1 2nd gen vs Soundcore Motion+
- Soundcore Boost “upgraded” 2021 vs B&O Beosound A1 2nd gen
- Denon Envaya DSB-250BT vs B&O Beosound A1 2nd gen
Prices on this page were last checked September 16, 2026 at 12:41 AM 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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The Two Speakers In Full
Ultimate Ears Megaboom 4: $200 Amazon eBay
Pros: IP67 rated, floats, and finally uses USB-C charging. 20 hour battery life. ‘PartyUp’ feature syncs multiple UE speakers together.
Cons: A lot of distortion at higher volumes. Rolled off treble. Not very loud. They really screwed this up
Full Ultimate Ears Megaboom 4 review and specifications →
| App | Yes |
|---|---|
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 3.4" x 3.4" x 8.9" (87 x 87 x 225 mm) |
| Drivers | 2x 50x50mm full-range + 2x 55x86mm passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 91dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | Yes (PartyUp up to 50 speakers) |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 2.4 lbs (1.1 kg) |
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B&O Beosound A1 2nd gen: $395.00 Amazon eBay
Pros: B&O Beosound A1 2nd gen uses 3.5mm aluminium driver + 0.75 inch silk dome tweeter. Its 558 g, claimed 18 hours (Manufacturer specified) battery life, IP67 protection, up to 93dB and mono playback make it a practical option for its intended room or portable use. Measured bass extension of 58Hz (-10dB).
Cons: Bass is limited by its 58Hz specification.
Full B&O Beosound A1 2nd gen review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Bass Extension (-10dB) | 58Hz |
| Battery Life | 18 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, aptX Adaptive |
| Bluetooth Latency | 90ms |
| Built-in Microphone | Yes |
| Digital Aux Input | Yes (USB-C) |
| Drivers | 3.5mm aluminium driver + 0.75 inch silk dome tweeter |
| EQ | Yes |
| IP Rating | IP67 |
| Maximum SPL | 93dB (measured by Alan Ross Reviews) |
| Omnidirectional | Pointing up |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 1.2 lbs (558 g) |
- Reviews, Comparisons and Sound Samples
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