These sit in different size classes, so this is not a straight ranking comparison. The JBL Xtreme 5 ranks #2 of 120 large speakers by sound quality at $399.95; the Zealot ZE51 ranks #16 of 113 boombox speakers by sound quality at $235.33.
The JBL Xtreme 5 is the longer-running, lighter option. A large waterproof speaker with deep bass, wide, clean sound at volume and a removable 28 hour battery. It is rated for 28 hours of battery against 4 for the Zealot ZE51. At 6.4 lbs (2.9 kg) it weighs much less than the Zealot ZE51 at 26 lbs (11.81 kg). It is rated IP68 against IPX5 for the Zealot ZE51. The catch: High priced.
The case for the Zealot ZE51: A big stereo boombox with clean, wide sound and low distortion at high volume for outdoor parties. It keeps a wired aux input, which the JBL Xtreme 5 lacks. The tradeoff: The Zealot ZE41 still wins on raw bass depth and price.
Buy the JBL Xtreme 5 at $399.95 if you want a large speaker. Buy the Zealot ZE51 at $235.33 if you want a boombox speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 11, 2026 at 3:26 AM 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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Specifications Side By Side
| JBL Xtreme 5 | Zealot ZE51 | |
|---|---|---|
| Price | $399.95 | $235.33 after coupon |
| Ranked | #2 of 120 in Large Size Portable Bluetooth Speakers | #16 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | Yes |
| Battery Life | 28 hours (Manufacturer specified) | 4 hours (Manufacturer specified) |
| EQ | Yes (7 band) | Yes (Hi-Res, 3D Surround, Extra Bass, Vocal and other sound modes) |
| IP Rating | IP68 | IPX5 |
| Maximum SPL | 110dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Auracast) | - |
| Power Bank | Yes (USB-C, 5V/3A) | Yes (USB-A + USB-C) |
| Power Input | USB-C | Type-C |
| Removable Battery | Yes | - |
| TWS | Yes | Yes |
| Weight | 6.4 lbs (2.9 kg) | 26 lbs (11.81 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LC3 | SBC (inferred; additional codecs unverified) |
| Built-in Microphone | No | - |
| Stereo | Partially (1 woofer) | Yes |
| Omnidirectional | No | No |
| Bluetooth Version | 6.0 | 5.3 |
| Dimensions | 13.6” x 6.5” x 6.1” (346 x 165 x 155 mm) | 22.1” x 9.4” x 13” (562 x 238 x 331 mm) |
| Drivers | 98x145mm woofer, 2x 20mm tweeters + 2x passive radiators | 1x 133mm + 2x 93mm + 2x 45mm |
| Frequency Response | 40Hz - 20kHz (Manufacturer specified) | 20Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 1 x 90W RMS Woofer + 2 x 20W RMS Tweeter (AC power mode) 1 x 60W RMS Woofer + 2 x 15W RMS Tweeter (Battery mode) | 250W |
| Digital Aux Input | Yes (USB-C) | No |
| Strap | Yes (detachable shoulder strap) | Yes (strap) |
| Bass Extension (-10dB) | 43Hz (measured by Alan Ross Reviews) | - |
| Battery Capacity | - | 48000mAh (12x4000mAh) |
| Microphone Input | - | Yes (Karaoke mode) |
| MicroSD Playback | - | Yes |
| USB Playback | - | Yes |
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