Short answer: the Zealot S89. It ranks #19 of 76 boombox speakers by sound quality, rated 4.0/5, at $246.99. The onn Pro X Large Boom Boombox ranks #35, rated 3.4/5, at $199, $47.99 cheaper, which does not close the gap in sound quality.
The case for the Zealot S89: A 7.3kg boombox with a claimed 36Hz bass extension, 40-hour battery life, IPX6 protection, USB-C charging, aux, USB and microSD playback, TWS and multi-speaker PartyAdd. The tradeoff: At high volume, listener reports describe the bass as loose or muddy and the overall balance as less clear than better boombox speakers.
What the onn Pro X Large Boom Boombox does well: High rated power for the price at 180W RMS (540W peak). The tradeoff: Bass not as deep as higher ranked speakers like the JBL Boombox 3, JBL Boombox 4, or Tribit Stormbox Blast.
Buy the Zealot S89. It is rated higher for sound quality, and the $47.99 you would save on the onn Pro X Large Boom Boombox does not close the gap.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Zealot S89 | onn Pro X Large Boom Boombox | |
|---|---|---|
| Price | $246.99 | $199.00 |
| Ranked | #19 of 76 in Boombox Size Portable Bluetooth Speakers | #35 of 76 in Boombox Size Portable Bluetooth Speakers |
| App | No | - |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 36Hz | - |
| Battery Life | 40 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| EQ | Yes (multiple modes) | Yes (Bass Boost) |
| IP Rating | IPX6 | IP67 |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| MicroSD Playback | Yes | - |
| Party Mode | Yes (PartyAdd up to 100 speakers) | Yes (Auracast) |
| Power Input | USB-C | AC Power cord |
| Stereo | Yes | - |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 16.1 lbs (7.3 kg) | 17.2 lbs (7.8 kg) |
| Power Bank | Yes (USB-A + USB-C) | Yes (USB-A, 5V/2A) |
| USB Playback | Yes | - |
| Built-in Microphone | No | - |
| Amplifier Power | 250W | 180W RMS (540W peak) |
| Dimensions | 21.2” x 10.4” x 9.4” (538 x 265 x 240 mm) | 20.1” x 10.3” x 9” (510 x 261 x 228 mm) |
| Drivers | 130W subwoofer + 2x 40mm drivers + 2x tweeters | 5 speakers |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.3 | 5.4 (Manufacturer specified) |
| Strap | No | - |
| Removable Battery | - | No |
| Discontinued | - | No |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Lights | - | Yes |
Related Speaker Comparisons
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- JBL Partybox Encore 2 vs Zealot S89
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- JBL Partybox Encore vs Zealot S89
Prices on this page were last checked September 26, 2026 at 11:14 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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The Two Speakers In Full
Zealot S89: $246.99 Amazon AliExpress eBay
Pros: A 7.3kg boombox with a claimed 36Hz bass extension, 40-hour battery life, IPX6 protection, USB-C charging, aux, USB and microSD playback, TWS and multi-speaker PartyAdd. Listener comparisons find it capable of very high output and substantial bass for outdoor use. A great value for its bass, battery life and maximum volume. Measured bass extension of 36Hz (-10dB).
Cons: At high volume, listener reports describe the bass as loose or muddy and the overall balance as less clear than better boombox speakers. The heavy cabinet and basic finish also make it less polished for daily portability, while its multiple EQ modes cannot substitute for a genuinely neutral tuning.
Full Zealot S89 review and specifications →
| Amplifier Power | 250W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 36Hz |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 21.2” x 10.4” x 9.4” (538 x 265 x 240 mm) |
| Drivers | 130W subwoofer + 2x 40mm drivers + 2x tweeters |
| EQ | Yes (multiple modes) |
| IP Rating | IPX6 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | Yes (PartyAdd up to 100 speakers) |
| Power Bank | Yes (USB-A + USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 16.1 lbs (7.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Oluv Patreon: Zealot S89 vs Yeahbox Boom Max3 - indoor listening test More from Oluv’Sone →
- Oluv Patreon: Zealot S89 vs Yeahbox Sonic Boom Max3 - outdoor test
- Dominik Reviews: Zealot S89 vs JBL Boombox 4 - JBL Alternative? Sound Test More from Dominik Reviews →
- Jagist reviews: Jbl Boombox 4 Vs Zealot S89!!! More from Jagistreviews →
- Techder Audios: ZEALOT S89 VS ZEALOT ZE01 EXTREME POWERFULL VS COMPACTER BASS PERFORMANCE! More from techderaudios →
- Head-to-Head Comparisons
onn Pro X Large Boom Boombox: $199.00 Walmart eBay
Pros: High rated power for the price at 180W RMS (540W peak). IP67 waterproof design for indoor and outdoor use. 20 hour battery life. 6 LED lighting modes. Party Mode supports multiple devices.
Cons: Bass not as deep as higher ranked speakers like the JBL Boombox 3, JBL Boombox 4, or Tribit Stormbox Blast. Frequency response isn’t as smooth as the top ranked speakers. Charges via AC cable rather than USB-C. Only available in the United States and Canada.
Full onn Pro X Large Boom Boombox review and specifications →
| Amplifier Power | 180W RMS (540W peak) |
|---|---|
| Aux Input | Yes |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.4 (Manufacturer specified) |
| Digital Aux Input | No |
| Dimensions | 20.1” x 10.3” x 9” (510 x 261 x 228 mm) |
| Discontinued | No |
| Drivers | 5 speakers |
| EQ | Yes (Bass Boost) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Lights | Yes |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-A, 5V/2A) |
| Power Input | AC Power cord |
| Removable Battery | No |
| TWS | Yes |
| Weight | 17.2 lbs (7.8 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- onn Pro X Large Boom Boombox vs Teufel Boomster 2021
- onn Pro X Large Boom Boombox vs JBL Authentics 300
- onn Pro X Large Boom Boombox vs W-King X20
- onn Pro X Large Boom Boombox vs Soundcore Boom 2 Plus
- onn Pro X Large Boom Boombox vs Sony ULT Field 7
- onn Pro X Large Boom Boombox vs Zealot S95
- onn Pro X Large Boom Boombox vs LG Xboom Stage 301
- onn Pro X Large Boom Boombox vs Tribit Stormbox Blast 2
- See all 15 comparisons