Short answer: the B&O Beosound A1 2nd gen if sound quality matters most, the Ultimate Ears Wonderboom 4 if price matters most. The B&O Beosound A1 2nd gen ranks #10 of 150 medium speakers, rated 4.3/5, at $395. The Ultimate Ears Wonderboom 4 ranks #95, rated 2.9/5, at $59.99, $335.01 cheaper.
The Ultimate Ears Wonderboom 4 is the lighter pick. 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: Bass isn’t as deep as the top-ranked speakers and is a little thuddy.
The B&O Beosound A1 2nd gen is the better-sounding option. It supports aptX Adaptive Bluetooth, which the Ultimate Ears Wonderboom 4 lacks. It has an adjustable EQ, which the Ultimate Ears Wonderboom 4 lacks.
Buy the Ultimate Ears Wonderboom 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.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Ultimate Ears Wonderboom 4 | B&O Beosound A1 2nd gen | |
|---|---|---|
| Price | $59.99 | $395.00 |
| Ranked | #95 of 150 in Medium Size Portable Bluetooth Speakers | #10 of 150 in Medium Size Portable Bluetooth Speakers |
| Battery Life | 14 hours (Manufacturer specified) | 18 hours (Manufacturer specified) |
| Maximum SPL | 87dB (Manufacturer specified) | 93dB (measured by Alan Ross Reviews) |
| 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”W x 5.2”D x 1.8”H (133 x 133 x 46 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) | 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 |
| 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) |
| Bass Extension (-10dB) | - | 58Hz |
| Bluetooth Latency | - | 90ms |
| Amplifier Power | - | 60W total (2x 30W Class D) |
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 30, 2026 at 2:57 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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The Two Speakers In Full
Ultimate Ears Wonderboom 4: $59.99 Amazon eBay
Older models: the Ultimate Ears Wonderboom 3 (ranked lower, rated 2.9/5), the Ultimate Ears Wonderboom 2 (ranked lower, rated 2.9/5) and the Ultimate Ears Wonderboom (ranked lower, rated 2.9/5).
Pros: Small size.
Cons: Bass isn’t as deep as the top-ranked speakers and is a little thuddy. Not much improvement over the previous Ultimate Ears Wonderboom 3 besides the USB-C charging port.
Full Ultimate Ears Wonderboom 4 review and specifications →
| App | No |
|---|---|
| Aux Input | No |
| Battery Life | 14 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| EQ | No |
| IP Rating | IP67 |
| Maximum SPL | 87dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 0.9 lbs (420 g) |
- Links
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B&O Beosound A1 2nd gen: $395.00 Amazon eBay
Newer model: the B&O Beosound A1 3rd gen, ranked lower, rated 4.1/5.
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 →
| Amplifier Power | 60W total (2x 30W Class D) |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 58Hz |
| Battery Life | 18 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, aptX Adaptive |
| Bluetooth Latency | 90ms |
| Bluetooth Version | 5.1 |
| Built-in Microphone | Yes |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 5.2”W x 5.2”D x 1.8”H (133 x 133 x 46 mm) |
| 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 |
| Strap | Yes (built-in strap) |
| TWS | Yes |
| Weight | 1.2 lbs (558 g) |
- Links
- Reviews, Comparisons and Sound Samples
- JOY‘s 🎧3D🔈Audio-Show: B&O Beoplay/Beosound A1 - all 3 generations compared More from Oluv’Sone →
- JOY‘s 🎧3D🔈Audio-Show: B&O Beosound A1 3rd gen vs 2nd gen - worth the premium?
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- techkiste.net: B&O Beosound A1 (2nd Gen) vs Bose Revolve 2 vs Bose Revolve+ 2 sound-comparison
- Oluv Patreon: B&O Beosound A1 2nd gen vs Beoplay A1 outdoors with a bit of Anker Soundcore Motion+ too
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