Short answer: the B&O Beolit 20. It ranks #43 of 90 boombox speakers by sound quality, rated 3.4/5, at $749. The Sony ULT Field 7 ranks #56, rated 3.2/5, at $400, $349 cheaper, a saving that is not big enough to make up the sound-quality gap.
The case for the B&O Beolit 20: Wireless phone charging. The tradeoff: Warm sound.
What the Sony ULT Field 7 gets right: Better sounding than the XG500. The catch: Still not as deep bass as the top ranked speakers.
Buy the B&O Beolit 20. It is rated higher for sound quality, and the $349 saving on the Sony ULT Field 7 is not enough to make up the difference.
Battery life favors the Sony ULT Field 7: rated for 30 hours against 8 hours for the B&O Beolit 20.
If water resistance matters to you, the Sony ULT Field 7 at IP67 (brief submersion) holds up far better than the B&O Beolit 20 at IPX4 (splashing).
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| B&O Beolit 20 | Sony ULT Field 7 | |
|---|---|---|
| Price | $749.00 | $400 |
| Ranked | #43 of 90 in Boombox Size Portable Bluetooth Speakers | #56 of 90 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (Bang & Olufsen app) | No |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 45Hz | ~52Hz |
| Battery Life | 8 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| EQ | Yes (App EQ) | Yes (App + ULT button) |
| Stereo | No | Yes |
| Omnidirectional | Yes | No |
| TWS | Yes | Yes |
| Weight | 6 lbs (2.7 kg) | 13.9 lbs (6.3 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Party Mode | No | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C) | Yes (USB-A, 5V/1.5A) |
| USB Playback | No | Yes |
| Built-in Microphone | Yes | Yes |
| Power Input | USB-C | AC Power cord |
| Amplifier Power | 240W peak | 100W |
| Dimensions | 5.3” x 9.1” x 7.4” (135 x 230 x 189 mm) | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 2x 30mm tweeters + 2x 40mm mid-range + 1x 60mm woofer + dual passive radiators | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| IP Rating | IPX4 | IP67 |
| Maximum SPL | 93dB (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Version | 4.2 | 5.2 |
| Strap | Yes (built-in strap) | No |
| Guitar Input | - | Yes |
| Microphone Input | - | Yes (Karaoke mode with echo effect) |
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Prices on this page were last checked October 2, 2026 at 10:18 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 Beolit 20: $749.00 Amazon eBay
Pros: B&O Beolit 20 uses 2x 30mm tweeters + 2x 40mm mid-range + 1x 60mm woofer + dual passive radiators. Its 2.7 kg, claimed 8 hours (Manufacturer specified) battery life, IPX4 protection, aux input, up to 93dB and mono playback make it a practical option for its intended room or portable use. The top doubles as a wireless phone charger. Measured bass extension of 45Hz (-10dB).
Cons: Bass is limited by its 45Hz specification.
Full B&O Beolit 20 review and specifications →
| Amplifier Power | 240W peak |
|---|---|
| App | Yes (Bang & Olufsen app) |
| Aux Input | Yes |
| Bass Extension (-10dB) | 45Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 5.3” x 9.1” x 7.4” (135 x 230 x 189 mm) |
| Drivers | 2x 30mm tweeters + 2x 40mm mid-range + 1x 60mm woofer + dual passive radiators |
| EQ | Yes (App EQ) |
| IP Rating | IPX4 |
| Maximum SPL | 93dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in strap) |
| TWS | Yes |
| USB Playback | No |
| Weight | 6 lbs (2.7 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: B&O Beolit 20 vs Earfun UBoom X - everything fake? More from Oluv’Sone →
- Joy & Oluv’Sone: $600 premium Bluetooth speaker vs $115 cheapo UBoom X
- techkiste.net: B&O Beolit 20 vs Vifa Copenhagen 2.0 sound-comparison with different music-genres
- Oluv Patreon: B&O Beolit 20 - frequency response measurements
- Head-to-Head Comparisons
Sony ULT Field 7: $400 Amazon eBay
Older model: the Sony SRS-XG500 (ranked lower, rated 3/5).
Pros: Sony ULT Field 7 uses 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters. Its 6.3 kg, claimed 30 hours (Manufacturer specified) battery life, IP67 protection, aux input and stereo playback make it a practical option for its intended room or portable use. Measured bass extension of ~52Hz (-10dB).
Cons: Bass is limited by its ~52Hz specification. There is no companion app. A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
Full Sony ULT Field 7 review and specifications →
| Amplifier Power | 100W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~52Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| EQ | Yes (App + ULT button) |
| Guitar Input | Yes |
| IP Rating | IP67 |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/1.5A) |
| Power Input | AC Power cord |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 13.9 lbs (6.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony ULT Field 7 vs Skullcandy Barrel
- Sony ULT Field 7 vs Soundcore Rave Party 2
- Sony ULT Field 7 vs Yeahbox Sonic Boom Max 3
- Sony ULT Field 7 vs Teufel Boomster NG (2017)
- Sony ULT Field 7 vs Onn Medium Party Speaker Gen 2
- Sony ULT Field 7 vs JBL Partybox On the Go
- Sony ULT Field 7 vs Sony SRS-XG500
- Sony ULT Field 7 vs Gemini GRV-650L
- See all 76 comparisons