Short answer: the JBL Xtreme 4 for features, the Marshall Stockwell II for the most natural Marshall tuning. The Xtreme 4’s main edge is a removable battery, but it is high priced. The Stockwell II may be the most natural sounding Marshall speaker, but it is not stereo.
Buy the Marshall Stockwell II. It is rated higher for sound quality than the JBL Xtreme 4 and costs less, which makes it the one to get unless you need something the other one does better.
Water resistance is not close: the JBL Xtreme 4 is rated at IP67 (brief submersion), well ahead of the Marshall Stockwell II at IPX4 (splashing).
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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Specifications Side By Side
| JBL Xtreme 4 | Marshall Stockwell II | |
|---|---|---|
| Price | $309.95 | $229.99 |
| Ranked | #43 of 120 in Large Size Portable Bluetooth Speakers | #11 of 120 in Large Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| EQ | Yes (5 band) | No |
| IP Rating | IP67 | IPX4 |
| Bluetooth Latency | 220ms | 50ms |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | 96dB (measured by Alan Ross Reviews) |
| Party Mode | Yes (Auracast) | No |
| Power Bank | Yes (USB-C) | No |
| Power Input | USB-C | USB-C |
| Removable Battery | Yes | - |
| TWS | Yes | No |
| Weight | 4.6 lbs (2.1 kg) | 3.1 lbs (1.4 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| Stereo | Yes | No |
| Omnidirectional | No | Yes |
| Bluetooth Version | 5.3 | 5.0 |
| Dimensions | 11.7” x 5.9” x 5.6” (297 x 149 x 141 mm) | 7.1” x 6.3” x 2.8” (180 x 161 x 70 mm) |
| Drivers | 2x 70mm woofers, 2x 19mm tweeters + 2x passive radiators | 3” woofer, 2x 2” fullrange tweeters |
| Frequency Response | 44Hz - 20kHz (Manufacturer specified) | 60Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 100W | 20W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | Yes (built-in strap) |
| Bass Extension (-10dB) | - | 44Hz |
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