Short answer: the JBL Xtreme 4 if sound quality matters most, the Zealot S79 if price matters most. The JBL Xtreme 4 ranks #43 of 120 large speakers, rated 3.8/5, at $309.95. The Zealot S79 ranks #52, rated 3.6/5, at $106.97, $202.98 cheaper.
In a full sound battle the reviewer preferred the JBL Xtreme 4 in every way, at mid volume and at max volume. The Zealot S79 is very loud with good bass, but its sound was less pleasant, especially in its bass EQ mode, which sounded muddy.
If you do buy the Zealot, leave it on the normal EQ. Its strengths are a huge 24,000mAh battery with a claimed 50+ hours, RGB lights, a shoulder strap and a power bank output.
The Xtreme 4 adds IP67 protection, the JBL Portable app with EQ, Auracast multi speaker linking and a replaceable battery.
Buy the JBL Xtreme 4 if sound quality is the priority over the price, or the Zealot S79 if the price is the priority over sound quality.
Want more options? Browse the full Portable Bluetooth rankings.
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 4 | Zealot S79 | |
|---|---|---|
| Price | $309.95 | $106.97 |
| Ranked | #43 of 120 in Large Size Portable Bluetooth Speakers | #52 of 120 in Large Size Portable Bluetooth Speakers |
| App | Yes | - |
| Aux Input | No | - |
| Battery Life | 24 hours (Manufacturer specified) | 50+ hours (Manufacturer specified) |
| EQ | Yes (5 band) | - |
| IP Rating | IP67 | IPX6 |
| Bluetooth Latency | 220ms | - |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Auracast) | - |
| Power Bank | Yes (USB-C) | Yes |
| Power Input | USB-C | - |
| Removable Battery | Yes | - |
| TWS | Yes | Yes |
| Weight | 4.6 lbs (2.1 kg) | 7.3 lbs (3.3 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | - |
| Built-in Microphone | Yes | - |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Bluetooth Version | 5.3 | 5.3 |
| Dimensions | 11.7” x 5.9” x 5.6” (297 x 149 x 141 mm) | 13.4” x 7.2” x 5.7” (340 x 184 x 146 mm) |
| Drivers | 2x 70mm woofers, 2x 19mm tweeters + 2x passive radiators | 2 woofers + 2 tweeters |
| Frequency Response | 44Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 100W | 100W (150W peak) |
| Digital Aux Input | No | - |
| Strap | Yes (detachable shoulder strap) | Yes (detachable shoulder strap) |
| Lights | - | Yes |
Watch Them Compared
Videos and reviews that test both speakers side by side.
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