Short answer: the Zealot PT21. It ranks #15 of 50 party speakers by sound quality at $216.73; the Bose S1 Pro ranks #16 and costs $699, so there is not much of a tradeoff to weigh.
The case for the Zealot PT21: Dual 166mm woofers and 200W output in a lighter, more compact body than the ZE41, with a bundled wireless microphone and echo effect built in for karaoke. The tradeoff: Unlike some other Zealot models, app-based EQ customization doesn’t appear to be fully supported yet, and IPX5 means it can handle splashes but not submersion.
What the Bose S1 Pro gets right: Extremely compact and light with flexible placement options. The catch: With full range music, it becomes distorted above ⅔ volume.
Buy the Zealot PT21. It ranks higher for sound quality than the Bose S1 Pro and costs less, so there is no real case for the other one.
If water resistance matters to you, the Zealot PT21 at IPX5 (water jets) holds up far better than the Bose S1 Pro at no water resistance.
Specifications Side By Side
| Zealot PT21 | Bose S1 Pro | |
|---|---|---|
| Price | $216.73 | $699.00 Discontinued |
| Ranked | #15 of 50 in Party Size Portable Bluetooth Speakers | #16 of 50 in Party Size Portable Bluetooth Speakers |
| App | No | Yes |
| Aux Input | Yes | Yes |
| Battery Capacity | 48000mAh (12x4000mAh) | - |
| Bluetooth Version | 5.3 | 5.0 |
| Dimensions | 21.1" x 8.6" x 11.9" (535 x 219 x 303 mm) | 13.1" x 9.4" x 11" (332.7 x 238.8 x 279.4 mm) |
| Drivers | 2x 166mm woofers + tweeters + midrange drivers | 1x 6" (152mm) woofer + 3x 2.25" (57mm) tweeters |
| EQ | Yes (Bass, Voice, Standard modes) | Yes |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | - |
| IP Rating | IPX5 | None |
| Microphone Input | Yes (Karaoke mode with echo effect) | Yes |
| MicroSD Playback | Yes | - |
| Output Power | 200W | - |
| Party Mode | Yes (PartyAdd up to 100 speakers) | Yes (Bose Party mode) |
| Power Bank | Yes (USB-A) | No |
| Power Input | Type-C | AC Power cord |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | No |
| Weight | 20.7 lbs / 9.4 kg | 14.3 lbs / 6.5 kg |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | 55Hz |
| Battery Life | - | 11 hours (Manufacturer specified) |
| Bluetooth Codecs | - | AAC, SBC |
| Charging Time | - | 5 hours |
| XLR Input | - | Yes |
| Discontinued | - | Yes |
| Max Volume | - | 109dB |
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The Two Speakers In Full
Zealot PT21: $216.73 Aliexpress
Pros: Dual 166mm woofers and 200W output in a lighter, more compact body than the ZE41, with a bundled wireless microphone and echo effect built in for karaoke. Quite deep bass for the price, even deeper than the JBL Boombox 4 in direct comparisons.
Cons: Unlike some other Zealot models, app-based EQ customization doesn’t appear to be fully supported yet, and IPX5 means it can handle splashes but not submersion.
Full Zealot PT21 review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Battery Capacity | 48000mAh (12x4000mAh) |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 21.1" x 8.6" x 11.9" (535 x 219 x 303 mm) |
| Drivers | 2x 166mm woofers + tweeters + midrange drivers |
| EQ | Yes (Bass, Voice, Standard modes) |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX5 |
| MicroSD Playback | Yes |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Output Power | 200W |
| Party Mode | Yes (PartyAdd up to 100 speakers) |
| Power Bank | Yes (USB-A) |
| Power Input | Type-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 20.7 lbs / 9.4 kg |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Jagist reviews: Zealot PT21 Vs Jbl Boombox 4!!! 😁😁😁
- Techder Audios: Zealot PT21 - Soundtest “BUDGET PARTYBOX WITH BASS ?”
- Jagist reviews: Zealot PT21 Vs Zealot Ze21!!! 🥰😍🥰
- Jagist reviews: Zealot PT21 Unboxing And Review!!! 😈😈😈
- Techder Audios: Zealot PT21 VS Yeahbox Sonic Boom Ultra “BASS VS QUALITY BASS!?”
- Jagist reviews: Zealot Ze41 Vs Zealot PT21!!! BATTLE OF THE BROTHERS!!! 😝😝😝
- Jagist reviews: Zealot PT21 Vs Yeahbox Sonic Boom Max3!!! 💥💥💥
- Jagist reviews: Zealot PT21 Vs Zealot S89!!! 😈😈😈
- Jagist reviews: Zealot PT21 Vs LG xboom Stage301!!! 🫣🫣🫣
- Jagist reviews: Zealot PT21 Slim Back Rattle Fix!!!😇😇😇
- Reddit Search for Zealot PT21 Review
- Head-to-Head Comparisons
Bose S1 Pro: $699.00 Discontinued Amazon
Pros: Extremely compact and light with flexible placement options. Full sound with no lack of low-end output, crystal-clear audio quality. Three-channel mixer (2 mic/line + 1 line/Bluetooth). Auto EQ adjusts sound based on orientation. Multiple angled surfaces for various positioning including tilted portrait mode. Up to 11 hours battery life. Professional build quality. High efficiency drivers reach 2-3x the volume of typical speakers for the same wattage.
Cons: With full range music, it becomes distorted above ⅔ volume. Better suited for voice amplification. Not as much deep bass as the Everse 8, midrange sounds reasonably balanced. Treble is pretty boosted. Not stereo. Designed for more loudness than deeper bass. Discontinued.
Full Bose S1 Pro review and specifications →
| App | Yes |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 55Hz |
| Battery Life | 11 hours (Manufacturer specified) |
| Bluetooth Codecs | AAC, SBC |
| Bluetooth Version | 5.0 |
| Charging Time | 5 hours |
| Digital Aux Input | No |
| Dimensions | 13.1" x 9.4" x 11" (332.7 x 238.8 x 279.4 mm) |
| Discontinued | Yes |
| Drivers | 1x 6" (152mm) woofer + 3x 2.25" (57mm) tweeters |
| EQ | Yes |
| IP Rating | None |
| Max Volume | 109dB |
| Microphone Input | Yes |
| Omnidirectional | No |
| Party Mode | Yes (Bose Party mode) |
| Power Bank | No |
| Power Input | AC Power cord |
| Stereo | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 14.3 lbs / 6.5 kg |
| XLR Input | Yes |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Precision Drive Audio: Music test for BOSE S1 PRO& PD K8 & JBL EON ONE COMPACT
- Precision Drive Audio: Bose S1 pro VS PD K8 VS JBL EON ONE COMPACT
- HQ AUDIO Exchange: Bose S1 Pro vs. JBL PartyBox 100 Bass Sound Test 😱💥🔥
- briansredd: Electro-Voice Everse 8 VS Bose S1 Pro - Side By Side Shoot-Out (Attempt)
- briansredd: Q&A - Electro-Voice Everse 8 Vs Bose S1 Pro AND (Warning) My Opinion
- True Techy: BOSE S1 Pro vs JBLPartybox ENCORE This Comparison SHOCKED me!!!
- JPW Pro: EV Everse 8 vs JBL EON One Compact Review
- W. Weiss: Part 3 Shootout MACKIE THUMP GO vs BOSE S1 PRO vs JBL EON ONE COMPACT Max Volume Demo A New Winner!
- James from Canada: SOUND TESTS - Soundboks, Minirig 3, dB Technologies, Bose S1 Pro, etc - RAVE TEST
- Reddit Search for Bose S1 Pro Review
- Head-to-Head Comparisons