Short answer: the Soundcore Motion X600. It ranks #19 of 78 large speakers by sound quality at $150; the Marshall Stockwell III ranks #56 and costs $249.99, which makes this an easy call rather than a real tradeoff.
What the Soundcore Motion X600 offers: Firmware 4.2.9 is a big improvement in sound quality over previous releases. Try this Oluv EQ for the best sound quality Watch for: Stock frequency response is wavy. Use spatial mode for best sound quality. Need a different EQ for each volume step. Dip in the upper bass around 120hz. Rising frequency response, treble a little hot. Would be ranked around #20 without the Oluv EQ. Even with the Oluv EQ the bass isn’t very deep and the sound is still a little unnatural.
What the Marshall Stockwell III offers: 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. Watch for: 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 2 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.
Buy the Soundcore Motion X600. It ranks higher for sound quality than the Marshall Stockwell III and costs less, so there is no real case for the other one.
If battery life is a priority, the Marshall Stockwell III is rated for 40 hours versus 12 hours for the Soundcore Motion X600.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Soundcore Motion X600 | Marshall Stockwell III | |
|---|---|---|
| Price | $150 | $249.99 |
| Ranked | #19 of 78 in Large Size Portable Bluetooth Speakers | #56 of 78 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 0ms | - |
| Bass Extension (-10dB) | 52Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| IP Rating | IPX7 | IP55 |
| Bluetooth Latency | 83ms | - |
| Maximum SPL | 104dB (measured by Alan Ross Reviews) | - |
| Power Bank | Yes (USB-C) | Yes |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Partially |
| Omnidirectional | No | Yes |
| TWS | Yes | - |
| Weight | 5.2 lbs (2.35 kg) | 2.9 lbs (1.3 kg) |
| App | No | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LE Audio with LC3 |
| Built-in Microphone | Yes | - |
| EQ | No | Yes (parametric, via app) |
| Party Mode | Yes (PartyCast up to 100 speakers) | - |
| Bluetooth Version | 5.3 | 5.3 |
| Dimensions | 11.8" x 4.8" x 3.2" (300 x 121 x 81 mm) | 7.1" x 6.4" x 2.9" (180 x 162 x 74 mm) |
| Drivers | 2x 60mm woofers, 2x 27mm tweeters, 1x 50mm upward-firing driver | 1x 3" woofer, 2x 1.75" wide-band drivers |
| Frequency Response | 50Hz - 40kHz (Manufacturer specified) | 54Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 50W | 44W |
| Digital Aux Input | No | No |
Related Speaker Comparisons
How Soundcore Motion X600 compares with other leading options:
- Soundcore Motion X600 vs Vifa Helsinki
- JBL Xtreme 5 vs Soundcore Motion X600
- Tribit Stormbox Lava vs Soundcore Motion X600
- Soundcore Motion X600 vs Brane X
- Soundcore Motion X600 vs Minirig 4 with subwoofer
Prices on this page were last checked September 16, 2026 at 12:41 AM 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 X600: $150 Amazon B&H Photo Video eBay
Pros: Firmware 4.2.9 is a big improvement in sound quality over previous releases. Try this Oluv EQ for the best sound quality. Measured bass extension of 52Hz (-10dB).
Cons: Stock frequency response is wavy. Use spatial mode for best sound quality. Need a different EQ for each volume step. Dip in the upper bass around 120hz. Rising frequency response, treble a little hot. Would be ranked around #20 without the Oluv EQ. Even with the Oluv EQ the bass isn’t very deep and the sound is still a little unnatural.
Full Soundcore Motion X600 review and specifications →
| Amplifier Power | 50W |
|---|---|
| App | No |
| Aux Input | Yes |
| Aux Latency | 0ms |
| Bass Extension (-10dB) | 52Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 83ms |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.8" x 4.8" x 3.2" (300 x 121 x 81 mm) |
| Drivers | 2x 60mm woofers, 2x 27mm tweeters, 1x 50mm upward-firing driver |
| EQ | No |
| Frequency Response | 50Hz - 40kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Maximum SPL | 104dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (PartyCast up to 100 speakers) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 5.2 lbs (2.35 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Soundcore Motion X600 now tuned by Alan Ross (sort of) Not clickbait! More from alanrossreviews →
- Alan Ross Reviews: breaking news…..Soundcore Motion X600 with LDAC and spatial audio!
- Alan Ross Reviews: Spatial Audio: Soundcore Motion X600 Vs Tribit Stormbox Blast
- Alan Ross Reviews: Soundcore Motion x600 (best speaker ever) or two motion booms?
- Alan Ross Reviews: Craziest firmware update ever - Soundcore Motion X600 3.2.8/4.2.8 🤦♀️
- Oluv Patreon: SoundCore Motion X600 vs VIFA Helsinki More from Oluv’Sone →
- NeverEnoughTech: soundcore Motion X600 vs. Sonos Move vs. Bose Soundlink Revolve II
- Jay’s Straight Up Reviews & More: TREBLAB HD-360 (360° Sound) vs Soundcore Motion X600 (Spatial Sound)😮💨 Cornered in Basement Kitchen More from JaysStraightUpReviews →
- Head-to-Head Comparisons
- Soundcore Motion X600 vs Soundcore Rave Neo 2
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- Soundcore Motion X600 vs Soundcore Select Pro
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Marshall Stockwell III: $249.99 Marshall eBay
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 2 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 |
| Weight | 2.9 lbs (1.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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