Short answer: the B&O Beosound A1 2nd gen. It ranks #11 of 164 medium speakers by sound quality (rated 4.3/5) at $395 and is still sold new; the Bogasing M4 ranks #28 (rated 4.0/5) and is discontinued, so it is only an option used.
The B&O Beosound A1 2nd gen is the lighter option. At 1.2 lbs (558 g) it weighs noticeably less than the Bogasing M4 at 1.6 lbs (731 g). It has an adjustable EQ, which the Bogasing M4 lacks.
The Bogasing M4 is the louder, longer-running pick. Super Bass mode gives the most balanced sound. Alan Ross Reviews measured it at 99dB at full volume, against 93dB for the B&O Beosound A1 2nd gen. It is rated for 24 hours of battery against 18 for the B&O Beosound A1 2nd gen. It keeps a wired aux input, which the B&O Beosound A1 2nd gen lacks. The tradeoff: It sounds a bit harsh and thin.
Buy the B&O Beosound A1 2nd gen. It is rated higher for sound quality, and the Bogasing M4 is discontinued, so it is only available used.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| B&O Beosound A1 2nd gen | Bogasing M4 | |
|---|---|---|
| Price | $395.00 | $45.99 Discontinued |
| Ranked | #11 of 164 in Medium Size Portable Bluetooth Speakers | #28 of 164 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | 58Hz | 54Hz |
| Battery Life | 18 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Built-in Microphone | Yes | - |
| EQ | Yes | No |
| IP Rating | IP67 | IPX7 |
| Bluetooth Latency | 90ms | 150ms |
| Maximum SPL | 93dB (measured by Alan Ross Reviews) | 99dB (measured by Alan Ross Reviews) |
| Power Bank | No | - |
| Stereo | No | Yes |
| Omnidirectional | Pointing up | No |
| TWS | Yes | Yes |
| Digital Aux Input | Yes (USB-C) | No |
| Weight | 1.2 lbs (558 g) | 1.6 lbs (731 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, aptX Adaptive | SBC (inferred; additional codecs unverified) |
| Power Input | USB-C | USB-C |
| Drivers | 3.5mm aluminium driver + 0.75 inch silk dome tweeter | 52mm speaker unit |
| Dimensions | 5.2”W x 5.2”D x 1.8”H (133 x 133 x 46 mm) | 3.1”H x 8.4”W x 2.5”D (80 x 214 x 63 mm) |
| Amplifier Power | 60W total (2x 30W Class D) | 40W |
| Bluetooth Version | 5.1 | 5.0 |
| Strap | Yes (built-in strap) | - |
| MicroSD Playback | - | Yes |
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 October 4, 2026 at 9:58 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
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?
- Alan Ross Reviews: B&O Beoplay A1 2nd gen vs Minirig mk3 bluetooth speaker More from alanrossreviews →
- Alan Ross Reviews: B&O Beoplay A1 2nd gen vs Minirig mk3 bluetooth speaker
- Alan Ross Reviews: Soundcore Motion Plus vs Beoplay A1 2nd gen - The Match!
- 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
- Oluv Patreon: (Anker) Soundcore Motion 300 - first impressions
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Bogasing M4: $45.99 Discontinued eBay
Newer model: the Bogasing M5, ranked lower, rated 3.5/5.
Pros: Bogasing M4 uses 52mm speaker unit. Its 731 g, claimed 24 hours (Manufacturer specified) battery life, IPX7 protection, aux input, up to 99dB and stereo playback make it a practical option for its intended room or portable use. Super Bass mode gives the most balanced sound. Measured bass extension of 54Hz (-10dB).
Cons: Bass is limited by its 54Hz specification. There is no companion app. No EQ adjustment. It sounds a bit harsh and thin. Discontinued.
Full Bogasing M4 review and specifications →
| Amplifier Power | 40W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 54Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Latency | 150ms |
| Bluetooth Version | 5.0 |
| Digital Aux Input | No |
| Dimensions | 3.1”H x 8.4”W x 2.5”D (80 x 214 x 63 mm) |
| Drivers | 52mm speaker unit |
| EQ | No |
| IP Rating | IPX7 |
| Maximum SPL | 99dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.6 lbs (731 g) |
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Bogasing M4 Review - vs JBL Charge 5 & Motion Plus - a new contender? More from alanrossreviews →
- Alan Ross Reviews: Bose Soundlink Flex vs Soundcore Boost vs Bogasing M4 - cheap or Bose?
- Alan Ross Reviews: Bogasing M4 or Soundcore Boost or Maxsound Plus for $50 champion?? 🤷♀️
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