Short answer: the Soundcore Motion X500. It ranks #27 of 82 large speakers by sound quality, rated 4.1/5, at $99.99; the Marshall Stockwell III ranks #59, rated 3.0/5, and costs $249.99, so there is not much of a tradeoff to weigh.
Why pick the Soundcore Motion X500: 40W stereo with 3-driver layout (two tweeters + woofer). Watch for: A little bright on top, a custom EQ can flatten things out a bit.
Why pick the Marshall Stockwell III: 40+ hour battery life with a user-replaceable battery, strap, sleeve and grilles. The catch: Highs are recessed by default and need the treble control maxed to compensate, still lacking detail even then.
Buy the Soundcore Motion X500. It is rated higher for sound quality than the Marshall Stockwell III and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Battery life favors the Marshall Stockwell III: rated for 40 hours against 12 hours for the Soundcore Motion X500.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Soundcore Motion X500 | Marshall Stockwell III | |
|---|---|---|
| Price | $99.99 | $249.99 |
| Ranked | #27 of 82 in Large Size Portable Bluetooth Speakers | #59 of 82 in Large Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Bass Extension (-10dB) | 48Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| EQ | Yes | Yes (parametric, via app) |
| IP Rating | IPX7 | IP55 |
| Maximum SPL | 104dB (measured by Alan Ross Reviews) | - |
| Party Mode | No | - |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Partially |
| Omnidirectional | No | Yes |
| TWS | Yes | No |
| Weight | 4.6 lbs (2.1 kg) | 2.9 lbs (1.3 kg) |
| Aux Input | Yes | Yes |
| Bluetooth Codecs | LDAC, SBC | SBC, AAC, LE Audio with LC3 |
| Built-in Microphone | Yes | - |
| Power Bank | No | Yes |
| Bluetooth Version | 5.3 | 5.3 |
| Dimensions | 8.7” x 8” x 3.2” (220 x 202 x 81 mm) | 7.1” x 6.4” x 2.9” (180 x 162 x 74 mm) |
| Drivers | 2x 58mm (2.3”) forward-firing full-range drivers + 1x 43mm (1.7”) upward-firing driver | 1x 3” woofer, 2x 1.75” wide-band drivers |
| Frequency Response | 50Hz - 40kHz (Manufacturer specified) | 54Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 40W | 44W |
| Digital Aux Input | No | No |
| Strap | No | Yes (detachable strap) |
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Prices on this page were last checked September 26, 2026 at 11:14 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
Soundcore Motion X500: $99.99 Amazon eBay
Pros: 40W stereo with 3-driver layout (two tweeters + woofer). IPX7 weatherproof rating. Compact and very portable. Fine build quality at this price. Spatial Dynamic mode provides immersive sound. Gets close to 12 hour battery claim. Measured bass extension of 48Hz (-10dB).
Cons: A little bright on top, a custom EQ can flatten things out a bit. Peaks at 250Hz and dip at 1kHz
Full Soundcore Motion X500 review and specifications →
| Amplifier Power | 40W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Bass Extension (-10dB) | 48Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | LDAC, SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 8.7” x 8” x 3.2” (220 x 202 x 81 mm) |
| Drivers | 2x 58mm (2.3”) forward-firing full-range drivers + 1x 43mm (1.7”) upward-firing driver |
| EQ | Yes |
| Frequency Response | 50Hz - 40kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Maximum SPL | 104dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 4.6 lbs (2.1 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Marshall Stockwell III: $249.99 Marshall eBay
Older model: the Marshall Stockwell II (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 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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