Short answer: the Yeahbox Sonic Boom Ultra. It ranks #11 of 112 boombox speakers by sound quality, rated 4.2/5, at $388; the B&O Beolit 20 ranks #48, rated 3.4/5, and costs $749, so there is not much of a tradeoff to weigh.
The Yeahbox Sonic Boom Ultra is the better-sounding, longer-running option. A massively loud boombox with deep bass, long battery life, and HDMI ARC so it can double as a TV soundbar. It is rated for 24 hours of battery against 8 for the B&O Beolit 20. It is rated IPX6 against IPX4 for the B&O Beolit 20. It plays in stereo from a single unit, unlike the B&O Beolit 20. The tradeoff: The 500W peak-power rating doesn’t fully hold up: it gets noisy above roughly 80-90% volume, and the midrange isn’t fully refined, sometimes sitting a touch too forward.
The B&O Beolit 20 is the lighter choice. A premium designer portable with 360 degree sound and a top that doubles as a wireless phone charger. At 6 lbs (2.7 kg) it weighs much less than the Yeahbox Sonic Boom Ultra at 24.3 lbs (11 kg).
Buy the Yeahbox Sonic Boom Ultra. It is rated higher for sound quality than the B&O Beolit 20 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Want more options? Browse the full Portable Bluetooth rankings.
A massively loud boombox with deep bass, long battery life, and HDMI ARC so it can double as a TV soundbar.
A premium designer portable with 360 degree sound and a top that doubles as a wireless phone charger.
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Specifications Side By Side
| Yeahbox Sonic Boom Ultra | B&O Beolit 20 | |
|---|---|---|
| Price | $388.00 | $749.00 |
| Ranked | #11 of 112 in Boombox Size Portable Bluetooth Speakers | #48 of 112 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes (Bang & Olufsen app) |
| Aux Input | Yes | Yes |
| Battery Capacity | 45000mAh (Reviewer estimated) | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 6.0 | 4.2 |
| Dimensions | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) | 5.3” x 9.1” x 7.4” (135 x 230 x 189 mm) |
| Drivers | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way | 2x 30mm tweeters + 2x 40mm mid-range + 1x 60mm woofer + dual passive radiators |
| EQ | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) | Yes (App EQ) |
| Inputs | HDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic | - |
| IP Rating | IPX6 | IPX4 |
| MicroSD Playback | Yes | - |
| Amplifier Power | 320W RMS / 500W Peak | 240W peak |
| Party Mode | No (TWS stereo pairing of 2 units only, no Auracast) | No |
| Power Input | USB-C (60W fast charging) | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | Yes |
| TWS | Yes | Yes |
| USB Playback | Yes | No |
| Weight | 24.3 lbs (11 kg) | 6 lbs (2.7 kg) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Lights | Yes | - |
| Battery Life | 24 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Strap | No | Yes (built-in strap) |
| Bass Extension (-10dB) | - | 45Hz |
| Power Bank | - | Yes (USB-C) |
| Built-in Microphone | - | Yes |
| Maximum SPL | - | 93dB (Manufacturer specified) |
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