Short answer: the Marshall Stockwell III, if you are buying new. The JBL Xtreme ranks higher than it (#70 vs #76 of 102 large speakers, 3.2/5 vs 3.0/5) but is discontinued, so only consider it used; the Marshall Stockwell III is still sold new at $249.99.
The JBL Xtreme is the tougher choice. 15 hour battery. It is rated IPX7 against IP55 for the Marshall Stockwell III. Watch for: Issues with bass distortion at high volumes.
The Marshall Stockwell III is the longer-running, lighter choice. 40+ hour battery life with a user-replaceable battery, strap, sleeve and grilles. It is rated for 40 hours of battery against 15 for the JBL Xtreme. At 2.9 lbs (1.3 kg) it weighs much less than the JBL Xtreme at 5.3 lbs (2.4 kg). It supports AAC Bluetooth, which the JBL Xtreme lacks. Watch for: Highs are recessed by default and need the treble control maxed to compensate, still lacking detail even then.
Buy the Marshall Stockwell III new; the JBL Xtreme is no longer sold new, so it only makes sense as a used find.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| JBL Xtreme | Marshall Stockwell III | |
|---|---|---|
| Price | $200 Discontinued | $249.99 |
| Ranked | #70 of 102 in Large Size Portable Bluetooth Speakers | #76 of 102 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Battery Life | 15 hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Connect) | - |
| TWS | No | No |
| Weight | 5.3 lbs (2.4 kg) | 2.9 lbs (1.3 kg) |
| App | No | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LE Audio with LC3 |
| Built-in Microphone | Yes | - |
| EQ | No | Yes (parametric, via app) |
| IP Rating | IPX7 | IP55 |
| Power Bank | No | Yes |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Partially |
| Omnidirectional | No | Yes |
| Bluetooth Version | 4.1 | 5.3 |
| Drivers | 2x 63mm woofers, 2x 35mm tweeters | 1x 3” woofer, 2x 1.75” wide-band drivers |
| Dimensions | 11.1” x 5” x 4.8” (283 x 126 x 122 mm) | 7.1” x 6.4” x 2.9” (180 x 162 x 74 mm) |
| Frequency Response | 70Hz - 20kHz (Manufacturer specified) | 54Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 40W | 44W |
| Digital Aux Input | No | No |
| Strap | - | Yes (detachable strap) |
Related Speaker Comparisons
How JBL Xtreme compares with other leading options:
- JBL Xtreme 5 vs JBL Xtreme
- Tribit Stormbox Lava vs JBL Xtreme
- Soundcore Boom 2 vs JBL Xtreme
- Marshall Stockwell II vs JBL Xtreme
- Harman Kardon Citation 200 vs JBL Xtreme
Prices on this page were last checked October 4, 2026 at 9:58 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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The Two Speakers In Full
JBL Xtreme: $200 Discontinued eBay
Newer model: the JBL Xtreme 5, ranked higher, rated 4.6/5.
Pros: 15 hour battery. IPX7 water resistance. JBL Connect for pairing with other JBL speakers. Built-in microphone for calls.
Cons: Issues with bass distortion at high volumes. An older speaker outclassed by newer releases of the Xtreme. External AC power brick for charging. Discontinued.
Full JBL Xtreme review and specifications →
| Amplifier Power | 40W |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.1 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.1” x 5” x 4.8” (283 x 126 x 122 mm) |
| Drivers | 2x 63mm woofers, 2x 35mm tweeters |
| EQ | No |
| Frequency Response | 70Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Connect) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | No |
| Weight | 5.3 lbs (2.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Marshall Stockwell III: $249.99 Marshall eBay
Older model: the Marshall Stockwell II (ranked higher, rated 4.5/5).
Pros: 40+ hour battery life with a user-replaceable battery, strap, sleeve and grilles. Doubles as a USB-C power bank. IP55 dust/water resistance. App includes parametric EQ, a Soundstage widening control, and wall/corner placement compensation. Endless-rotation control knobs.
Cons: Highs are recessed by default and need the treble control maxed to compensate, still lacking detail even then. Bass tends to sound resonant and boomy, with reported frequency cancellation and phase issues on complex material that EQ doesn’t fully resolve. Oluv’s A/B testing against the outgoing Stockwell II finds the default tuning muffled and muddy enough to prefer the seven-year-old original out of the box, and output loses dynamics and bass while turning harsh well below maximum volume. No aptX support.
Full Marshall Stockwell III review and specifications →
| Amplifier Power | 44W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 40+ hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LE Audio with LC3 |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 7.1” x 6.4” x 2.9” (180 x 162 x 74 mm) |
| Drivers | 1x 3” woofer, 2x 1.75” wide-band drivers |
| EQ | Yes (parametric, via app) |
| Frequency Response | 54Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP55 |
| Omnidirectional | Yes |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Partially |
| Strap | Yes (detachable strap) |
| TWS | No |
| Weight | 2.9 lbs (1.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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