Short answer: the Yeahbox Sonic Boom Ultra. It ranks #11 of 112 boombox speakers by sound quality (rated 4.2/5) at $388 and is still sold new; the Bumpboxx Flare 6 ranks #82 (rated 2.6/5) and is discontinued, so it is only an option used.
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 12 for the Bumpboxx Flare 6. It has an adjustable EQ, which the Bumpboxx Flare 6 lacks. Watch for: 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 Bumpboxx Flare 6 is the lighter pick. A retro styled stereo party speaker with water resistance and a 12 hour battery. At 13 lbs (5.9 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; the Bumpboxx Flare 6 is no longer sold new.
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 retro styled stereo party speaker with water resistance and a 12 hour battery.
Prices on this page were last checked October 31, 2026 at 7:11 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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Specifications Side By Side
| Yeahbox Sonic Boom Ultra | Bumpboxx Flare 6 | |
|---|---|---|
| Price | $388.00 | $300 Discontinued |
| Ranked | #11 of 112 in Boombox Size Portable Bluetooth Speakers | #82 of 112 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Capacity | 45000mAh (Reviewer estimated) | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 6.0 | 5.0 |
| Dimensions | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) | 24” x 6” x 14” (609.6 x 152.4 x 355.6 mm) |
| Drivers | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way | 6” woofer + tweeters |
| EQ | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) | No |
| Inputs | HDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic | - |
| IP Rating | IPX6 | IPX6 |
| MicroSD Playback | Yes | - |
| Amplifier Power | 320W RMS / 500W Peak | 150W |
| Party Mode | No (TWS stereo pairing of 2 units only, no Auracast) | No |
| Power Input | USB-C (60W fast charging) | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | No |
| Weight | 24.3 lbs (11 kg) | 13 lbs (5.9 kg) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Lights | Yes | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Strap | No | - |
| Power Bank | - | No |
| Built-in Microphone | - | No |
| FM Tuner | - | Yes |
| Maximum SPL | - | 115dB (Manufacturer specified) |
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