Short answer: neither measures cleanly, so the JBL Boombox 3 for IP67 protection and the JBL Xtreme 4 for a removable battery. The Boombox 3 is IP67 rated but dips in the mid bass, boosts bass with a peak at 700Hz and trails the Blast in mids and treble. The Xtreme 4’s removable battery is its main draw, and it is high priced.
Buy the JBL Boombox 3 at $349.95 if you want a boombox speaker. Buy the JBL Xtreme 4 at $309.95 if you want a large speaker instead.
Want more options? Browse the full Portable Bluetooth rankings.
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Specifications Side By Side
| JBL Boombox 3 | JBL Xtreme 4 | |
|---|---|---|
| Price | $349.95 | $309.95 |
| Ranked | #27 of 113 in Boombox Size Portable Bluetooth Speakers | #43 of 120 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Aux Latency | 25ms | - |
| Bass Extension (-10dB) | 43Hz | - |
| Battery Life | 24 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| IP Rating | IP67 | IP67 |
| Bluetooth Latency | 100ms | 220ms |
| Maximum SPL | 110dB (measured by Alan Ross Reviews) | 106dB (measured by Alan Ross Reviews) |
| Party Mode | Yes (PartyBoost up to 100 speakers) | Yes (Auracast) |
| Power Input | AC Power cable | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 14.8 lbs (6.7 kg) | 4.6 lbs (2.1 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| App | No | Yes |
| EQ | No | Yes (5 band) |
| Power Bank | Yes (USB-A) | Yes (USB-C) |
| USB Playback | No | - |
| Built-in Microphone | No | Yes |
| FM Tuner | No | - |
| Microphone Input | No | - |
| MicroSD Playback | No | - |
| Amplifier Power | 180W AC / 136W battery | 100W |
| Dimensions | 19” x 10.1” x 7.9” (482 x 257 x 200 mm) | 11.7” x 5.9” x 5.6” (297 x 149 x 141 mm) |
| Drivers | 1x 189mm subwoofer + 2x 81mm woofers + 2x 20mm tweeters | 2x 70mm woofers, 2x 19mm tweeters + 2x passive radiators |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.3 | 5.3 |
| Strap | No | Yes (detachable shoulder strap) |
| Removable Battery | - | Yes |
| Frequency Response | - | 44Hz - 20kHz (Manufacturer specified) |
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