Short answer: the JBL Partybox 330 for better sound quality, the Zealot PT21 for the lower price. The JBL Partybox 330 ranks #1 of 46 party speakers at $629.95. The Zealot PT21 ranks #12 at $216.73, $413.22 cheaper.
What the Zealot PT21 gets right: Dual 166mm woofers deliver quite deep bass for the price, plus a bundled wireless microphone with echo effect built in for karaoke, for a third of the price. The catch: app-based EQ customization doesn’t appear to be fully supported yet.
On the JBL Partybox 330 side: The top-ranked party speaker here, with a removable battery, handle and wheels, and dual mic/guitar inputs for karaoke and live sets. The tradeoff: it’s very large, sound quality is nearly identical to the cheaper 310 and Stage 320, and JBL’s daisy-chain only works with other JBL speakers.
Buy the Zealot PT21 if the price matters more than sound quality. Buy the JBL Partybox 330 if sound quality matters more than the price.
Specifications Side By Side
| Zealot PT21 | JBL Partybox 330 | |
|---|---|---|
| Price | $216.73 | $629.95 |
| Ranked | #12 of 46 in Party Size Portable Bluetooth Speakers | #1 of 46 in Party Size Portable Bluetooth Speakers |
| App | No | Yes |
| Aux Input | Yes | Yes |
| Battery Capacity | 48000mAh (12x4000mAh) | - |
| Bluetooth Version | 5.3 | 6.0 |
| Dimensions | 21.1" x 8.6" x 11.9" (535 x 219 x 303 mm) | - |
| Drivers | 2x 166mm woofers + tweeters + midrange drivers | 2x 6.5" (165mm) woofers + 2x 1" (25mm) PEN dome tweeters |
| EQ | Yes (Bass, Voice, Standard modes) | Yes (Smart EQ mode) |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | - |
| IP Rating | IPX5 | IPX4 |
| Microphone Input | Yes (Karaoke mode with echo effect) | Yes (Karaoke mode with echo effect) |
| MicroSD Playback | Yes | - |
| Output Power | 200W | 280W |
| Party Mode | Yes (PartyAdd up to 100 speakers) | Yes (Auracast) |
| Power Bank | Yes | Yes |
| Power Input | Type-C | AC Power cord |
| Stereo | Yes | Partially |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes (USB-C, lossless) |
| Weight | 20.7 lbs / 9.4 kg | 37.7 lbs / 17.1 kg |
| Battery Life | - | 18 hours (Manufacturer specified) |
| Bluetooth Codecs | - | SBC |
| Charging Time | - | 3 hours |
| Guitar Input | - | Yes |
| Optical Input | - | Yes |
| Removable Battery | - | Yes |
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.
| App | No |
|---|---|
| Aux Input | Yes |
| Battery Capacity | 48000mAh (12x4000mAh) |
| Bluetooth Version | 5.3 |
| 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) |
| Output Power | 200W |
| Party Mode | Yes (PartyAdd up to 100 speakers) |
| Power Bank | Yes |
| Power Input | Type-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 20.7 lbs / 9.4 kg |
As an eBay Partner, I 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
JBL Partybox 330: $629.95 Amazon Bhphotovideo
Pros: Handle and wheels are convenient. Customizable lightshow. Removable battery. Slightly more power than the 310 and Stage 320 (280W vs 240W). Adds an optical TV input and USB-C lossless playback, plus dual mic and guitar inputs for karaoke and live sets.
Cons: Sound quality is nearly identical to the 310 and Stage 320 despite the power bump, so probably not worth an upgrade if you already own either of those. Removed the dedicated mic gain and microphone control knobs found on the 310/320. Some people don’t like the new lightshow design. Very large. Note, JBL daisychain is not compatible with any other non-JBL speaker and is possibly a fully digital signal.
| App | Yes |
|---|---|
| Aux Input | Yes |
| Battery Life | 18 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 6.0 |
| Charging Time | 3 hours |
| Drivers | 2x 6.5" (165mm) woofers + 2x 1" (25mm) PEN dome tweeters |
| EQ | Yes (Smart EQ mode) |
| Guitar Input | Yes |
| IP Rating | IPX4 |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Optical Input | Yes |
| Output Power | 280W |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes |
| Power Input | AC Power cord |
| Removable Battery | Yes |
| Stereo | Partially |
| TWS | Yes |
| USB Playback | Yes (USB-C, lossless) |
| Weight | 37.7 lbs / 17.1 kg |
As an eBay Partner, I may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- JBL Partybox 330 vs JBL Partybox Stage 320
- JBL Partybox 330 vs JBL Partybox 310
- JBL Partybox 330 vs JBL Partybox Club 120
- JBL Partybox 330 vs JBL Partybox 130
- JBL Partybox 330 vs JBL Partybox 100
- JBL Partybox 330 vs Electro-Voice Everse 12
- JBL Partybox 330 vs Electro-Voice Everse 8
- JBL Partybox 330 vs Bose S1 Pro
- See all 23 comparisons
As an Amazon Associate I earn from qualifying purchases. As an eBay Partner, I may be compensated if you make a purchase.
Product prices and availability were last checked August 10, 2026 at 7:14 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.