Short answer: the Yeahbox Sonic Boom Ultra. It ranks #11 of 112 boombox speakers by sound quality, rated 4.2/5, at $388. The Soundcore Boom 2 Plus ranks #39, rated 3.6/5, at $169.99, $218.01 cheaper, a saving that is not big enough to make up the sound-quality gap.
The Soundcore Boom 2 Plus is the lighter choice. A fairly light stereo boombox, easy to carry to the beach or park. At 8.4 lbs (3.8 kg) it weighs much less than the Yeahbox Sonic Boom Ultra at 24.3 lbs (11 kg). It links with other speakers (PartyCast 2.0), which the Yeahbox Sonic Boom Ultra cannot. Watch for: Warm tuning meaning a rolled off treble and some upper bass boost.
The Yeahbox Sonic Boom Ultra is the better-sounding option. A massively loud boombox with deep bass, long battery life, and HDMI ARC so it can double as a TV soundbar. The catch: 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.
Buy the Yeahbox Sonic Boom Ultra. It is rated higher for sound quality, and the $218.01 you would save on the Soundcore Boom 2 Plus does not close the gap.
Want more options? Browse the full Portable Bluetooth rankings.
A fairly light stereo boombox, easy to carry to the beach or park.
A massively loud boombox with deep bass, long battery life, and HDMI ARC so it can double as a TV soundbar.
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Specifications Side By Side
| Soundcore Boom 2 Plus | Yeahbox Sonic Boom Ultra | |
|---|---|---|
| Price | $169.99 | $388.00 |
| Ranked | #39 of 112 in Boombox Size Portable Bluetooth Speakers | #11 of 112 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 39Hz | - |
| Battery Life | 20 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| EQ | Yes (Pro EQ + presets) | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) |
| IP Rating | IPX7 | IPX6 |
| Maximum SPL | 111dB (measured by Alan Ross Reviews) | - |
| MicroSD Playback | No | Yes |
| Party Mode | Yes (PartyCast 2.0) | No (TWS stereo pairing of 2 units only, no Auracast) |
| Power Bank | Yes (USB-C, 5V/2A) | - |
| Power Input | USB-C | USB-C (60W fast charging) |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 8.4 lbs (3.8 kg) | 24.3 lbs (11 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC | SBC (inferred; additional codecs unverified) |
| USB Playback | No | Yes |
| Built-in Microphone | Yes | - |
| Amplifier Power | 140W | 320W RMS / 500W Peak |
| Dimensions | 17.3” x 9.1” x 5.9” (440 x 230 x 150 mm) | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) |
| Drivers | 2x 114mm (4.5”) woofers + 2x 19mm (0.75”) tweeters | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way |
| Digital Aux Input | No | No |
| Lights | Yes | Yes |
| Bluetooth Version | 5.3 | 6.0 |
| Strap | Yes (detachable strap) | No |
| Battery Capacity | - | 45000mAh (Reviewer estimated) |
| Inputs | - | HDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic |
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