Short answer: the Zealot S89, and the ranking gap is the story. It ranks #16 of 71 boombox speakers at $259.99; the Yeahbox ranks #37 at $228.99, only $31 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.
Specifications Side By Side
| Yeahbox Sonic Boom Max 3 | Zealot S89 | |
|---|---|---|
| Price | $228.99 | $193.58 |
| Ranked | #37 of 70 in Boombox Size Portable Bluetooth Speakers | #16 of 70 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 |
| TWS | Yes | Yes |
| Weight | 16.8 lbs / 7.64 kg | 16.1 lbs / 7.3 kg |
| USB Playback | Yes | Yes |
| Output Power | 200W RMS / 300W Peak | 250W |
| Dimensions | 20.67" x 8.27" x 10.55" (525 x 210 x 268 mm) | 538mm x 265mm x 240mm |
| Drivers | 189x114mm woofer, 2x 89mm midrange, 2x 38mm tweeters | 130W subwoofer + 2x 40mm drivers + 2x tweeters |
| Bluetooth Version | 5.3 | - |
| Bass Extension (-10dB) | - | 36Hz |
| Bluetooth Codecs | - | SBC |
| Party Mode | - | No |
| Power Bank | - | Yes |
| Built in Microphone | - | No |
The Two Speakers In Full
Yeahbox Sonic Boom Max 3: $228.99 Amazon
Pros: 200W RMS (300W peak) true 3-way, 5-driver array. 111Wh (14.8V/7,500mAh) battery with fast charging up to 60W. Bluetooth 5.3 with stereo TWS pairing, plus aux, USB, and microSD playback.
Cons: A budget import brand with limited independent testing - specs are manufacturer-claimed, and its water/dust rating is reported inconsistently across listings (IPX6 on Yeahbox’s own site, IP66 or IP67 on various marketplace listings).
| App | Yes |
|---|---|
| Aux Input | Yes |
| Battery Life | 111Wh (14.8V/7,500mAh) (Manufacturer specified) |
| Bluetooth Version | 5.3 |
| Dimensions | 20.67" x 8.27" x 10.55" (525 x 210 x 268 mm) |
| Drivers | 189x114mm woofer, 2x 89mm midrange, 2x 38mm tweeters |
| EQ | Yes |
| IP Rating | IPX6 |
| MicroSD Playback | Yes |
| Output Power | 200W RMS / 300W Peak |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 16.8 lbs / 7.64 kg |
- Reviews, Comparisons and Sound Samples
- Links
Zealot S89: $193.58 Aliexpress Amazon
Pros: A great value for the bass performance, play time and max volume in the boombox class. Likely the same internals as the Zealot ZE21
Cons: On the heavy side. A little rolled off up top and not that balanced through the rest of the range. Clarity isn’t as good as better speakers. Bass EQ is bloated and muddy sounding
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 36Hz |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built in Microphone | No |
| Dimensions | 538mm x 265mm x 240mm |
| Drivers | 130W subwoofer + 2x 40mm drivers + 2x tweeters |
| EQ | Yes (multiple modes) |
| IP Rating | IPX6 |
| MicroSD Playback | Yes |
| Output Power | 250W |
| Party Mode | No |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 16.1 lbs / 7.3 kg |
- Reviews, Comparisons and Sound Samples
- Oluv Patreon: Zealot S89 vs Yeahbox Boom Max3 - indoor listening test
- Oluv Patreon: Zealot S89 vs Yeahbox Sonic Boom Max3 - outdoor test
- Dominik Reviews: Zealot S89 vs JBL Boombox 4 - JBL Alternative? Sound Test
- Jagist reviews: Jbl Boombox 4 Vs Zealot S89!!!
- Techder Audios: ZEALOT S89 VS ZEALOT ZE01 EXTREME POWERFULL VS COMPACTER BASS PERFORMANCE!
- Links
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Product prices and availability were last checked August 8, 2026 at 6:24 AM UTC 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.