Short answer: the Zealot S89, and the ranking gap is the story. It ranks #19 of 113 boombox speakers at $193.58; the Yeahbox ranks #59 at $228.99, only $35.41 less.
The Yeahbox’s spec sheet is harder to trust. It’s a budget import brand with limited independent testing, so figures like the claimed 200W RMS are manufacturer-reported rather than measured, and even its own water rating is inconsistent: IPX6 on Yeahbox’s site, IP66 or IP67 on various marketplace listings. That uncertainty is baked into its lower ranking.
The Zealot is the more known quantity. Our notes flag it as likely sharing internals with the Zealot ZE21, a speaker already measured and ranked here, which gives its listed performance more credibility even with real flaws of its own: a rolled off top end and a bloated, muddy bass EQ.
Neither is a refined-sounding speaker. Both trade clarity for raw bass and volume, which is the whole appeal of this end of the boombox class. The Zealot simply does it with numbers we trust more.
Buy the Zealot S89 for the more credible spec sheet and higher ranking. Buy the Yeahbox only if the extra driver count and features on paper are worth the uncertainty to you.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A large party speaker with powerful bass, a big fast charging battery and app EQ for outdoor parties.
A great value boombox with deep bass, very high volume, a 40 hour battery and water resistance for outdoor parties.
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
| Yeahbox Sonic Boom Max 3 | Zealot S89 | |
|---|---|---|
| Price | $228.99 | $193.58 |
| Ranked | #59 of 113 in Boombox Size Portable Bluetooth Speakers | #19 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Life | 111Wh (14.8V/7,500mAh) (Manufacturer specified) | 40 hours (Manufacturer specified) |
| EQ | Yes | Yes (multiple modes) |
| IP Rating | IPX6 | IPX6 |
| MicroSD Playback | Yes | Yes |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 16.8 lbs (7.64 kg) | 16.1 lbs (7.3 kg) |
| USB Playback | Yes | Yes |
| Amplifier Power | 200W RMS / 300W Peak | 250W |
| Dimensions | 20.7” x 8.3” x 10.6” (525 x 210 x 268 mm) | 21.2” x 10.4” x 9.4” (538 x 265 x 240 mm) |
| Drivers | 189x114mm woofer, 2x 89mm midrange, 2x 38mm tweeters | 130W subwoofer + 2x 40mm drivers + 2x tweeters |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.3 |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Lights | Yes | - |
| Strap | No | No |
| Bass Extension (-10dB) | - | 36Hz |
| Party Mode | - | Yes (PartyAdd up to 100 speakers) |
| Power Bank | - | Yes (USB-A + USB-C) |
| Built-in Microphone | - | No |
Watch Them Compared
Videos and reviews that test both speakers side by side.
- Joy & Oluv’Sone: Zealot S89 vs Yeahbox Sonic Boom Max 3 - indoor listening fun
- Joy & Oluv’Sone: Zealot S89 vs Yeahbox Sonic Boom Max3 - outdoor test
- Oluv Patreon: Zealot S89 vs Yeahbox Sonic Boom Max 3
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