Short answer: the JBL Partybox 310 for better sound quality, the Zealot PT21 for the lower price. The JBL Partybox 310 ranks #3 of 50 party speakers at $579.95. The Zealot PT21 ranks #15 at $216.73, $363.22 cheaper.
The case for the JBL Partybox 310: Absolute deepest bass of any battery powered speaker, most balanced sound in the class, handle and wheels are convenient. The tradeoff: Very large.
What the Zealot PT21 gets right: 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 catch: 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.
Buy the JBL Partybox 310 if sound quality matters more than the price. Buy the Zealot PT21 if the price matters more than sound quality.
Specifications Side By Side
| JBL Partybox 310 | Zealot PT21 | |
|---|---|---|
| Price | $579.95 Discontinued | $216.73 |
| Ranked | #3 of 50 in Party Size Portable Bluetooth Speakers | #15 of 50 in Party Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 32Hz | - |
| Battery Life | 18 hours (Manufacturer specified) | - |
| Bluetooth Codecs | SBC | - |
| Charging Time | 3.5 hours | - |
| EQ | Yes (3 band) | Yes (Bass, Voice, Standard modes) |
| Guitar Input | Yes | - |
| IP Rating | IPX4 | IPX5 |
| Microphone Input | Yes (Karaoke mode with echo effect) | Yes (Karaoke mode with echo effect) |
| Party Mode | No | Yes (PartyAdd up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/2.1A) | Yes (USB-A) |
| Power Input | AC Power cord | Type-C |
| Stereo | Partially | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 37.5 lbs / 17 kg | 20.7 lbs / 9.4 kg |
| Output Power | 240W | 200W |
| Drivers | 2x 6.5" (165mm) woofers + 2x 2.5" (65mm) tweeters | 2x 166mm woofers + tweeters + midrange drivers |
| Discontinued | Yes | - |
| Digital Aux Input | No | No |
| Battery Capacity | - | 48000mAh (12x4000mAh) |
| Bluetooth Version | - | 5.3 |
| Dimensions | - | 21.1" x 8.6" x 11.9" (535 x 219 x 303 mm) |
| Frequency Response | - | 20Hz - 20kHz (Manufacturer specified) |
| MicroSD Playback | - | Yes |
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The Two Speakers In Full
JBL Partybox 310: $579.95 Discontinued Amazon
Pros: Absolute deepest bass of any battery powered speaker, most balanced sound in the class, handle and wheels are convenient. Increase treble one step in the app EQ to make it more neutral. Customizable color lighting modes. Very close to the 320 in terms of performance.
Cons: Very large. Note, JBL daisychain is not compatible with any other non-JBL speaker and is possibly a fully digital signal. Discontinued.
Full JBL Partybox 310 review and specifications →
| App | Yes |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 32Hz |
| Battery Life | 18 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Charging Time | 3.5 hours |
| Digital Aux Input | No |
| Discontinued | Yes |
| Drivers | 2x 6.5" (165mm) woofers + 2x 2.5" (65mm) tweeters |
| EQ | Yes (3 band) |
| Guitar Input | Yes |
| IP Rating | IPX4 |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Output Power | 240W |
| Party Mode | No |
| Power Bank | Yes (USB-A, 5V/2.1A) |
| Power Input | AC Power cord |
| Stereo | Partially |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 37.5 lbs / 17 kg |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- KULAS TECH SHOW: JBL Partybox 310, 100, on the Go Sound comparison
- Flossy Carter: JBL PartyBox 310 vs PartyBox 300
- DLX Willington: SONY SRS XP700 vs JBL PARTYBOX 310 First Impressions Binaural Sound Sample Sound Comparison
- GYMCADDY: Soundboks Go Vs JBL Partybox 310 Vs Sony XP700
- Jay’s Straight Up Reviews & More: Basement Bass Battle 💣 Sony XV800 ☢️ LG XL7 🔆 JBL Partybox 310 ☣️ All Plugged in, Sound Comparison
- Jay’s Straight Up Reviews & More: JBL Partybox Stage 320 vs 310 🛜 Defcon 5🚨 Bass Alert! Take Shelter Immediately! 😲 Best Bass Goes To?
- Jay’s Straight Up Reviews & More: JBL Partybox Stage 320 vs 310 🥳 A Family Feud! Battery Powered🔋Bluetooth Party Speakers Face-Off🤬
- Jay’s Straight Up Reviews & More: LG XL7 vs JBL Partybox 310 🏠 Indoor Bluetooth Party Speaker Battle. Plugged in🔌
- GYMCADDY: LG XBOOM XL7 Vs JBL Partybox 310 Vs Sony XP700
- Stereo Specs: JBL PARTYBOX 310 VS SONY GTK XB72 SOUND TEST COMPARISON
- Jay’s Straight Up Reviews & More: Sony SRS-XV900 vs JBL Partybox 310 - Can the JBL Middleweight 💪🏽 Compete With The Sony Heavyweight?
- Reddit Search for JBL Partybox 310 Review
- Head-to-Head Comparisons
- JBL Partybox 310 vs JBL Partybox Club 120
- JBL Partybox 310 vs JBL Partybox Stage 320
- JBL Partybox 310 vs JBL Partybox 330
- JBL Partybox 310 vs JBL Partybox 130
- JBL Partybox 310 vs JBL Partybox 100
- JBL Partybox 310 vs JBL Partybox 110
- JBL Partybox 310 vs JBL Partybox 300
- JBL Partybox 310 vs Onn XL Wireless Party Speaker
- See all 18 comparisons
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 ?”
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- Reddit Search for Zealot PT21 Review
- Head-to-Head Comparisons