These are not really the same size class, and that is the honest framing here. The Bose SoundLink Max ranks #17 of 120 large speakers by sound quality at $399; the Yeahbox Sonic Boom Ultra ranks #11 of 113 boombox speakers by sound quality at $388.
The Bose SoundLink Max is the lighter option. A rugged waterproof speaker with deep bass, a very long real world battery and a port that charges your phone. At 4.9 lbs (2.2 kg) it weighs much less than the Yeahbox Sonic Boom Ultra at 24.3 lbs (11 kg). The tradeoff: Big peak in the upper bass, dipped midrange and lots of peaks and dips above the midrange.
The case for the Yeahbox Sonic Boom Ultra: 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 Bose SoundLink Max 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.
Buy the Bose SoundLink Max at $399 if you want a large speaker. Buy the Yeahbox Sonic Boom Ultra at $388 if you want a boombox speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 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
| Bose SoundLink Max | Yeahbox Sonic Boom Ultra | |
|---|---|---|
| Price | $399.00 | $388.00 |
| Ranked | #17 of 120 in Large Size Portable Bluetooth Speakers | #11 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | Yes |
| Aux Latency | 33ms | - |
| Bass Extension (-10dB) | 48Hz | - |
| Battery Life | 20 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Built-in Microphone | No | - |
| IP Rating | IP67 | IPX6 |
| Bluetooth Latency | 116ms | - |
| Power Bank | Yes (USB-C) | - |
| Power Input | USB-C | USB-C (60W fast charging) |
| Stereo | Partially (1 tweeter) | Yes |
| Omnidirectional | No | No |
| Weight | 4.9 lbs (2.2 kg) | 24.3 lbs (11 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| EQ | No | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) |
| Party Mode | No | No (TWS stereo pairing of 2 units only, no Auracast) |
| TWS | Yes | Yes |
| Bluetooth Version | 5.3 | 6.0 |
| Dimensions | 10.4” x 4.7” x 4.1” (264.7 x 120.1 x 104.9 mm) | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) |
| Drivers | 2x 2.5” (63.5mm) midrange drivers + 1x 0.79” (20mm) tweeter | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way |
| Digital Aux Input | No | No |
| Strap | No | 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 |
| MicroSD Playback | - | Yes |
| Amplifier Power | - | 320W RMS / 500W Peak |
| USB Playback | - | Yes |
| Lights | - | Yes |
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