Short answer: the Brane X for depth, the JBL Xtreme 4 for battery flexibility. The Brane X has the absolute deepest bass in this category, but boosted upper bass around 120Hz and rolled-off treble leave it missing detail up top. The Xtreme 4’s headline feature is a removable battery, with some bass boost as the tradeoff.
Buy the Brane X. It is rated higher for sound quality, and the $239.05 you would save on the JBL Xtreme 4 does not close the gap.
There is a real battery-life gap here: the JBL Xtreme 4 is rated for 24 hours, the Brane X only 12 hours.
Looking for alternatives? See the complete Portable Bluetooth rankings.
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Specifications Side By Side
| Brane X | JBL Xtreme 4 | |
|---|---|---|
| Price | $549.00 | $309.95 |
| Ranked | #4 of 120 in Large Size Portable Bluetooth Speakers | #43 of 120 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Aux Latency | 295ms default, 33ms with aux pass-through | - |
| Bass Extension (-10dB) | 31Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | aptX HD, aptX, AAC, SBC | SBC |
| IP Rating | IP57 | IP67 |
| Bluetooth Latency | 100ms | 220ms |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | 106dB (measured by Alan Ross Reviews) |
| Party Mode | Yes (Brane app, up to 8 speakers) | Yes (Auracast) |
| Power Input | AC Power brick | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 7.7 lbs (3.5 kg) | 4.6 lbs (2.1 kg) |
| Wi-Fi | Yes | - |
| App | Yes (Brane app) | Yes |
| Built-in Microphone | Yes | Yes |
| Voice Assistants | Amazon Alexa | - |
| EQ | Yes (5 band) | Yes (5 band) |
| Power Bank | No | Yes (USB-C) |
| Dimensions | 9.3” x 7” x 6.1” (236 x 178 x 155 mm) | 11.7” x 5.9” x 5.6” (297 x 149 x 141 mm) |
| Drivers | 2x 2.5” midrange, 2x 0.75” tweeters + 6.5”x9” subwoofer | 2x 70mm woofers, 2x 19mm tweeters + 2x passive radiators |
| Frequency Response | 30Hz - 20kHz (Manufacturer specified) | 44Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 200W | 100W |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.1 | 5.3 |
| Strap | No | Yes (detachable shoulder strap) |
| Removable Battery | - | Yes |
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