Short answer: the JBL Xtreme 5, for bass depth and off-axis consistency. Reviewers find it plays clean at volume and holds up off-axis in a way the smaller Stockwell III cannot match, with bass reaching well below 40Hz and a removable battery in an IP68 cabinet for $399.95. The Stockwell III counters with a 2.9 lbs (1.3 kg) body, IP55 protection and a $249.99 price.
This is a mismatch in both size and sound quality. The Stockwell III offers a compact 2.9 lbs (1.3 kg) cabinet with parametric EQ, wall/corner compensation, and IP55 protection for $249.99. The JBL Xtreme 5 offers a removable battery, bass reaching well below 40Hz, and excellent off-axis dispersion in a 6.4 lbs (2.9 kg) IP68-rated cabinet for $399.95.
Choose the Xtreme 5 for deeper bass and better dispersion: Reviewers find it beats similarly-priced rivals on bass depth and clarity, plays clean at volume, and holds up off-axis in a way the smaller Stockwell III can’t match, backed by a removable battery and IP68 protection.
Choose the Stockwell III for a smaller, lighter, cheaper speaker: At 2.9 lbs (1.3 kg) versus 6.4 lbs (2.9 kg) and $149.96 less, it’s a genuinely portable option where the Xtreme 5’s size and weight aren’t practical.
Buy the JBL Xtreme 5. It is rated higher for sound quality, and the $149.96 saving on the Marshall Stockwell III is not enough to make up the difference.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A stylish, rugged speaker with a very long battery you can swap yourself, a detailed app EQ, and power bank charging.
A large waterproof speaker with deep bass, wide, clean sound at volume and a removable 28 hour battery.
Prices on this page were last checked October 31, 2026 at 7:11 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
| Marshall Stockwell III | JBL Xtreme 5 | |
|---|---|---|
| Price | $249.99 | $399.95 |
| Ranked | #79 of 115 in Large Size Portable Bluetooth Speakers | #2 of 115 in Large Size Portable Bluetooth Speakers |
| Drivers | 1x 3” woofer, 2x 1.75” wide-band drivers | 98x145mm woofer, 2x 20mm tweeters + 2x passive radiators |
| Frequency Response | 54Hz - 20kHz (Manufacturer specified) | 40Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 44W | 1 x 90W RMS Woofer + 2 x 20W RMS Tweeter (AC power mode) 1 x 60W RMS Woofer + 2 x 15W RMS Tweeter (Battery mode) |
| Battery Life | 40+ hours (Manufacturer specified) | 28 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 6.0 |
| Bluetooth Codecs | SBC, AAC, LE Audio with LC3 | SBC, AAC, LC3 |
| IP Rating | IP55 | IP68 |
| Weight | 2.9 lbs (1.3 kg) | 6.4 lbs (2.9 kg) |
| Dimensions | 7.1” x 6.4” x 2.9” (180 x 162 x 74 mm) | 13.6” x 6.5” x 6.1” (346 x 165 x 155 mm) |
| App | Yes | Yes |
| EQ | Yes (parametric, via app) | Yes (7 band) |
| Aux Input | Yes | No |
| Digital Aux Input | No | Yes (USB-C) |
| Power Bank | Yes | Yes (USB-C, 5V/3A) |
| Power Input | USB-C | USB-C |
| Stereo | Partially | Partially (1 woofer) |
| Omnidirectional | Yes | No |
| TWS | No | Yes |
| Strap | Yes (detachable strap) | Yes (detachable shoulder strap) |
| Maximum SPL | - | 110dB (measured by Alan Ross Reviews) |
| Party Mode | - | Yes (Auracast) |
| Removable Battery | - | Yes |
| Built-in Microphone | - | No |
| Bass Extension (-10dB) | - | 43Hz (measured by Alan Ross Reviews) |
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