Short answer: the JBL Xtreme 3 for treble and bass, the Stockwell II for neutrality. The Xtreme 3 improves on the Xtreme 2 with better treble and deeper bass, though its bass is boosted. 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 3 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
There is a real gap in water resistance: the JBL Xtreme 3 at IPX7 (brief submersion) against the Marshall Stockwell II, which has IPX4 (splashing).
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Marshall Stockwell II | JBL Xtreme 3 | |
|---|---|---|
| Price | $229.99 | $269.95 |
| Ranked | #11 of 93 in Large Size Portable Bluetooth Speakers | #18 of 93 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 44Hz | 53Hz |
| Battery Life | 20 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| IP Rating | IPX4 | IPX7 |
| Bluetooth Latency | 50ms | 133ms |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | 105dB (measured by Alan Ross Reviews) |
| Party Mode | No | Yes (PartyBoost up to 100 speakers) |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Yes | No |
| TWS | No | Yes |
| Weight | 3.1 lbs (1.4 kg) | 4 lbs (1.83 kg) |
| App | No | No |
| Built-in Microphone | Yes | Yes |
| EQ | No | No |
| Power Bank | No | Yes (USB-A + USB-C) |
| Bluetooth Version | 5.0 | 4.1 |
| Dimensions | 7.1” x 6.3” x 2.8” (180 x 161 x 70 mm) | 11.7” x 5.4” x 5.3” (298 x 136 x 134 mm) |
| Drivers | 3” woofer, 2x 2” fullrange tweeters | 2x 70mm woofers, 2x 20mm tweeters |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | 53.5Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 20W | 100W |
| Digital Aux Input | No | No |
| Strap | Yes (built-in strap) | Yes (detachable shoulder strap) |
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Prices on this page were last checked October 2, 2026 at 10:18 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
Marshall Stockwell II: $229.99 Amazon eBay
Newer model: the Marshall Stockwell III, ranked lower, rated 3/5.
Pros: Marshall Stockwell II uses 3” woofer, 2x 2” fullrange tweeters. Its 1.4 kg, claimed 20 hours (Manufacturer specified) battery life, IPX4 protection, aux input, up to 96dB and mono playback make it a practical option for its intended room or portable use. Possibly the most natural sounding Marshall speaker, with excellent off-axis sound. Measured bass extension of 44Hz (-10dB).
Cons: Bass is limited by its 44Hz specification. There is no companion app. No EQ adjustment. Not very loud, and the added DSP reverb may annoy purists.
Full Marshall Stockwell II review and specifications →
| Amplifier Power | 20W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 44Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 50ms |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 7.1” x 6.3” x 2.8” (180 x 161 x 70 mm) |
| Drivers | 3” woofer, 2x 2” fullrange tweeters |
| EQ | No |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX4 |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in strap) |
| TWS | No |
| Weight | 3.1 lbs (1.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Marshall Stockwell 2 vs Soundcore Motion Boom and Motion Plus! expensive is better? More from alanrossreviews →
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- Oluv Patreon: Marshall Stockwell III vs Stockwell II More from Oluv’Sone →
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JBL Xtreme 3: $269.95 Amazon eBay
Newer model: the JBL Xtreme 5, ranked higher, rated 4.6/5.
Pros: Better treble and deeper bass than the Xtreme 2. More balanced sounding than the Xtreme 4. Measured bass extension of 53Hz (-10dB).
Cons: Boosted bass. Not as deep bass as better speakers. Not as balanced as better speakers.
Full JBL Xtreme 3 review and specifications →
| Amplifier Power | 100W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 53Hz |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 133ms |
| Bluetooth Version | 4.1 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.7” x 5.4” x 5.3” (298 x 136 x 134 mm) |
| Drivers | 2x 70mm woofers, 2x 20mm tweeters |
| EQ | No |
| Frequency Response | 53.5Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Maximum SPL | 105dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (PartyBoost up to 100 speakers) |
| Power Bank | Yes (USB-A + USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (detachable shoulder strap) |
| TWS | Yes |
| Weight | 4 lbs (1.83 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Mateusz Cholewa: TRIBIT StormBox LAVA - Unboxing.📦 Short Test vs Xtreme 4 More from Mateusz Cholewa →
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- Alan Ross Reviews: JBL Xtreme 3 vs JBL Xtreme 2 and Xtreme 1 - review and sound test
- Alan Ross Reviews: Anker Soundcore Motion Boom Plus vs JBL Xtreme 3 - Extreme review!
- DLX Willington: Who Sounds The Best Of Sony XG300, XB43 & JBL XTREME3 With Sound Sample BLIND CHALLENGE Reveal. More from DLXWillington →
- New Stuff TV: Sony SRS-XG300 Vs JBL Xtreme 3 More from NewStuffTV1 →
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- Smart Home Sounds: Best Premium Bluetooth Speakers: Sonos Move, JBL Xtreme 3, Marshall Middleton & More… More from Smart Home Sounds →
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- Jay’s Straight Up Reviews & More: Ortizan M8🦨 Bluetooth Speaker. Is This The Budget JBL Xtreme 3 Killer? Better Than Zealot S67? More from JaysStraightUpReviews →
- Danny Pops: It’s shaped like a Football - JBL Xtreme 3 Review vs Marshall Tufton and Flips Party Mode More from DannyPops →
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