Short answer: the Yeahbox Sonic Boom Ultra. It ranks #11 of 112 boombox speakers by sound quality, rated 4.2/5, at $388. The Tronsmart Bang Max ranks #52, rated 3.4/5, at $229.99, $158.01 cheaper, a saving that is not big enough to make up the sound-quality gap.
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. 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 Tronsmart Bang Max is the lighter choice. A loud, feature packed party speaker with big bass, app EQ, lights, and separate mic and guitar inputs. At 12.8 lbs (5.8 kg) it weighs much less than the Yeahbox Sonic Boom Ultra at 24.3 lbs (11 kg). The catch: Its bass-first tuning prioritizes impact over accuracy: upper mids and lower treble can sound unnatural, while fine midrange and treble detail are limited.
Buy the Yeahbox Sonic Boom Ultra. It is rated higher for sound quality, and the $158.01 saving on the Tronsmart Bang Max is not enough to make up the difference.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A massively loud boombox with deep bass, long battery life, and HDMI ARC so it can double as a TV soundbar.
A loud, feature packed party speaker with big bass, app EQ, lights, and separate mic and guitar inputs.
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Specifications Side By Side
| Yeahbox Sonic Boom Ultra | Tronsmart Bang Max | |
|---|---|---|
| Price | $388.00 | $229.99 |
| Ranked | #11 of 112 in Boombox Size Portable Bluetooth Speakers | #52 of 112 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | Yes |
| Battery Capacity | 45000mAh (Reviewer estimated) | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 6.0 | 5.3 |
| Dimensions | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) | 18.5” x 7.8” x 10.2” (470 x 199 x 260 mm) |
| Drivers | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way | 2x ~165mm (6.5”) woofers + 2x ~63mm (2.5”) mid drivers + 2x ~25mm (1”) tweeters |
| EQ | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) | Yes (multiple modes) |
| 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 | Yes |
| Amplifier Power | 320W RMS / 500W Peak | 130W |
| 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) | 12.8 lbs (5.8 kg) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Lights | Yes | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Strap | No | - |
| Aux Latency | - | 16ms |
| Bass Extension (-10dB) | - | 39Hz |
| Bluetooth Latency | - | 160ms |
| Maximum SPL | - | 111dB (measured by Alan Ross Reviews) |
| Power Bank | - | Yes (USB-A) |
| Built-in Microphone | - | No |
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