These sit in different size classes, so this is not a straight ranking comparison. The JBL Boombox 4 ranks #20 of 113 boombox speakers by sound quality at $549.95; the JBL Xtreme 4 ranks #43 of 120 large speakers by sound quality at $309.95.
The JBL Boombox 4 is the louder choice. An extremely loud boombox for its size with fully waterproof, dustproof build, a long battery and a flexible app EQ. Alan Ross Reviews measured it at 115dB at full volume, against 106dB for the JBL Xtreme 4. It supports AAC Bluetooth, which the JBL Xtreme 4 lacks. Watch for: Pretty overpriced for the category.
The JBL Xtreme 4 is the lighter option. A rugged, waterproof speaker with clear, punchy sound, a swappable battery, a power bank and excellent real world battery life. At 4.6 lbs (2.1 kg) it weighs much less than the JBL Boombox 4 at 13.2 lbs (5.98 kg). The tradeoff: It cannot produce the deep rumble of a larger speaker, and bass compression increases near maximum volume.
Buy the JBL Boombox 4 at $549.95 if you want a boombox speaker. Buy the JBL Xtreme 4 at $309.95 if you want a large speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 PM 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 Boombox 4 | JBL Xtreme 4 | |
|---|---|---|
| Price | $549.95 | $309.95 |
| Ranked | #20 of 113 in Boombox Size Portable Bluetooth Speakers | #43 of 120 in Large Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Bass Extension (-10dB) | 41Hz | - |
| Battery Life | 28 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| EQ | Yes (7 band) | Yes (5 band) |
| IP Rating | IP68 | IP67 |
| Bluetooth Latency | AAC 144ms, SBC 48ms | 220ms |
| Maximum SPL | 115dB (measured by Alan Ross Reviews) | 106dB (measured by Alan Ross Reviews) |
| Party Mode | Yes (Auracast) | Yes (Auracast) |
| Power Input | AC Power cord | USB-C |
| Removable Battery | Yes | Yes |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Weight | 13.2 lbs (5.98 kg) | 4.6 lbs (2.1 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, LC3, AAC | SBC |
| Bluetooth Version | 5.4 | 5.3 |
| Built-in Microphone | No | Yes |
| Power Bank | Yes (USB-C, up to 30W) | Yes (USB-C) |
| TWS | Yes | Yes |
| Digital Aux Input | Yes (USB-C) | No |
| USB Playback | No | - |
| FM Tuner | No | - |
| Microphone Input | No | - |
| MicroSD Playback | No | - |
| Amplifier Power | 210W AC / 200W battery | 100W |
| Dimensions | 20.1” x 10.2” x 8.3” (510 x 260 x 210 mm) | 11.7” x 5.9” x 5.6” (297 x 149 x 141 mm) |
| Drivers | 2x 123mm woofers + 2x 20mm tweeters with passive radiators | 2x 70mm woofers, 2x 19mm tweeters + 2x passive radiators |
| Strap | No | Yes (detachable shoulder strap) |
| Frequency Response | - | 44Hz - 20kHz (Manufacturer specified) |
Watch Them Compared
Videos and reviews that test both speakers side by side.
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