Short answer: the B&O Beosound A1 2nd gen for better sound quality, the Sony ULT Field 1 for the lower price. The B&O Beosound A1 2nd gen ranks #10 of 142 medium speakers at $395. The Sony ULT Field 1 ranks #79 at $98, $297 cheaper.
What the Sony ULT Field 1 offers: IP67 rated, survives drops and 1m submersion. Real-world battery around 28+ hours with ULT (bass boost) mode off. Stereo-pairs with a second ULT Field 1. Watch for: Upper midrange peak, rolled off treble
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 Sony ULT Field 1 when the price outweighs sound quality for you, and the B&O Beosound A1 2nd gen when sound quality outweighs the price instead.
Battery life favors the B&O Beosound A1 2nd gen: rated for 18 hours against 12 hours for the Sony ULT Field 1.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Sony ULT Field 1 | B&O Beosound A1 2nd gen | |
|---|---|---|
| Price | $98.00 | $395.00 |
| Ranked | #79 of 142 in Medium Size Portable Bluetooth Speakers | #10 of 142 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Battery Life | 12 hours (Manufacturer specified) | 18 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes | Yes |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Party Connect up to 100 speakers) | - |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | Pointing up |
| TWS | Yes | Yes |
| Weight | 1.4 lbs (650 g) | 1.2 lbs (558 g) |
| Bluetooth Codecs | AAC, SBC | SBC, AAC, aptX Adaptive |
| Bluetooth Version | 5.3 | - |
| Dimensions | 8.1" x 3" x 3" (206 x 77 x 76 mm) | - |
| Drivers | 83mm x 42mm woofer, 16mm tweeter + passive radiator | 3.5mm aluminium driver + 0.75 inch silk dome tweeter |
| Digital Aux Input | No | Yes (USB-C) |
| Bass Extension (-10dB) | - | 58Hz |
| Bluetooth Latency | - | 90ms |
| Maximum SPL | - | 93dB (measured by Alan Ross Reviews) |
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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
Sony ULT Field 1: $98.00 Amazon eBay
Pros: IP67 rated, survives drops and 1m submersion. Real-world battery around 28+ hours with ULT (bass boost) mode off. Stereo-pairs with a second ULT Field 1.
Cons: Upper midrange peak, rolled off treble
Full Sony ULT Field 1 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | AAC, SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 8.1" x 3" x 3" (206 x 77 x 76 mm) |
| Drivers | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| EQ | Yes |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 1.4 lbs (650 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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) |
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