Short answer: the Zealot S89. It ranks #19 of 98 boombox speakers by sound quality, rated 4.0/5, at $246.99. The W-King X20 ranks #41, rated 3.5/5, at $229.99, $17 cheaper, a saving that is not big enough to make up the sound-quality gap.
The S89 has the deeper bass and longer battery. Its 130W subwoofer reaches about 36Hz before falling 10dB, it claims 40 hours of battery, and PartyAdd links up to 100 Zealots. Listener comparisons find it very loud with substantial bass, but that bass turns loose and muddy at high volume.
The W-King X20 is a strong, slightly lighter alternative. Its 7.5-inch subwoofer reaches about 42Hz before falling 10dB, Alan Ross measured 112dB, and it has an app EQ, a power bank output and a 24-hour battery rating. Its response rises toward the treble but rolls off at the very top, with peaks at 700Hz and 1.2kHz.
Buy the Zealot S89. It is rated higher for sound quality, and saving $17 with the W-King X20 does not make up for the sound-quality gap.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Zealot S89 | W-King X20 | |
|---|---|---|
| Price | $246.99 | $229.99 after coupon |
| Ranked | #19 of 98 in Boombox Size Portable Bluetooth Speakers | #41 of 98 in Boombox Size Portable Bluetooth Speakers |
| App | No | Yes (W-King app) |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 36Hz | ~42Hz |
| Battery Life | 40 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| EQ | Yes (multiple modes) | Yes (App + button modes) |
| IP Rating | IPX6 | IPX6 |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| MicroSD Playback | Yes | Yes |
| Party Mode | Yes (PartyAdd up to 100 speakers) | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 16.1 lbs (7.3 kg) | 15.9 lbs (7200 g) |
| Power Bank | Yes (USB-A + USB-C) | Yes (USB-A) |
| USB Playback | Yes | Yes |
| Built-in Microphone | No | No |
| Amplifier Power | 250W | 330W peak / 200W RMS |
| Dimensions | 21.2” x 10.4” x 9.4” (538 x 265 x 240 mm) | 19.9” x 8.5” x 10.6” (506 x 217 x 270 mm) |
| Drivers | 130W subwoofer + 2x 40mm drivers + 2x tweeters | 7.5” subwoofer + drivers |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.3 | 5.4 |
| Strap | No | - |
| Maximum SPL | - | 112dB (measured by Alan Ross Reviews) |
Related Speaker Comparisons
More worthwhile head-to-heads for Zealot S89:
- Tribit Stormbox Blast vs Zealot S89
- Harman Kardon Go + Play 3 vs Zealot S89
- JBL Partybox Encore 2 vs Zealot S89
- JBL PartyBox On-The-Go 2 Plus vs Zealot S89
- JBL Partybox Encore Essential 2 vs Zealot S89
Prices on this page were last checked October 12, 2026 at 4:13 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 $246.99 AliExpress $193.58 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 →
| Released | Mar 2025 (1 year ago) |
|---|---|
| Amplifier Power | 250W |
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 36Hz |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth | Yes |
| 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
- Joy & Oluv’Sone: Zealot S89 vs Yeahbox Sonic Boom Max 3 - indoor listening fun More from Oluv’Sone →
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- Oluv Patreon: Zealot S89 vs Yeahbox Sonic Boom Max 3
- Oluv Patreon: Zealot S89 vs Yeahbox Boom Max3 - indoor listening test
- Dominik Reviews: Zealot S89 vs JBL Boombox 4 - JBL Alternative? Sound Test More from Dominik Reviews →
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- YARNZO Tech: Zealot s89 vs zealot s98 Full sound comparison (with DB sound meter App) More from YARNZO Tech →
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- J_Strat Battles: Zealot S89 (Revised Version) vs PT11
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- Head-to-Head Comparisons
W-King X20: $229.99 after coupon Amazon $229.99 eBay
Pros: 200W RMS output with 330W peak power, 112dB max volume, exceptional 24-hour battery life with power bank, IPX6 waterproof, EQ with app control and button modes, 7.5-inch subwoofer, Bluetooth 5.3, dual pairing, MicroSD and USB playback, AUX input, TWS stereo mode with 240W combined. Measured bass extension of ~42Hz (-10dB).
Cons: Rising frequency response but upper treble rolled off, 700Hz and 1.2kHz peaks
Full W-King X20 review and specifications →
| Released | Jan 2024 (2 years ago) |
|---|---|
| Amplifier Power | 330W peak / 200W RMS |
| App | Yes (W-King app) |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~42Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.4 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 19.9” x 8.5” x 10.6” (506 x 217 x 270 mm) |
| Drivers | 7.5” subwoofer + drivers |
| EQ | Yes (App + button modes) |
| IP Rating | IPX6 |
| Maximum SPL | 112dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 15.9 lbs (7200 g) |
- Links
- Reviews, Comparisons and Sound Samples
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