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 Demerbox DB2 ranks #74 (rated 2.8/5) and is discontinued, so it is only an option used.
The Yeahbox Sonic Boom Ultra is the better-sounding choice. A massively loud boombox with deep bass, long battery life, and HDMI ARC so it can double as a TV soundbar. It has an adjustable EQ, which the Demerbox DB2 lacks. 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 Demerbox DB2 is the longer-running, lighter option. A nearly indestructible waterproof speaker built from a Pelican case, with a 40 hour battery and dry storage. It is rated for 40 hours of battery against 24 for the Yeahbox Sonic Boom Ultra. At 5.4 lbs (2.47 kg) it weighs much less than the Yeahbox Sonic Boom Ultra at 24.3 lbs (11 kg). The catch: Bass is not as deep as better speakers.
Buy the Yeahbox Sonic Boom Ultra. It is rated higher for sound quality and still sold new, while the Demerbox DB2 is discontinued.
Looking for alternatives? See the complete 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 nearly indestructible waterproof speaker built from a Pelican case, with a 40 hour battery and dry storage.
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 | Demerbox DB2 | |
|---|---|---|
| Price | $388.00 | $400 Discontinued |
| Ranked | #11 of 112 in Boombox Size Portable Bluetooth Speakers | #74 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 | - |
| Dimensions | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) | 10.6” x 9.7” x 6.9” (270 x 246 x 175 mm) |
| Drivers | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way | 2x 3” (76mm) aluminum cone full-range drivers |
| 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 | IP67 |
| MicroSD Playback | Yes | - |
| Amplifier Power | 320W RMS / 500W Peak | 22W RMS |
| Party Mode | No (TWS stereo pairing of 2 units only, no Auracast) | No |
| Power Input | USB-C (60W fast charging) | AC Power brick |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | No |
| Weight | 24.3 lbs (11 kg) | 5.4 lbs (2.47 kg) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Lights | Yes | - |
| Battery Life | 24 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Strap | No | - |
| Power Bank | - | Yes (USB-A + USB-C) |
| Built-in Microphone | - | No |
| FM Tuner | - | No |
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