Short answer: the Sony SRS-XB43. It ranks #42 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 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.
What the Sony SRS-XB43 offers: Full, warm sound with deep, rich bass. Twin passive radiators deliver Extra Bass impact. IPX7 waterproof and rugged. Up to 24 hour battery (14 hours with lights on). Party lights for visual appeal. Watch for: Not as loud as others in the category. Speaker will not remain at max volume and will turn itself down automatically.
Buy the Sony SRS-XB43. It ranks higher for sound quality than the Marshall Stockwell III and costs less, so the other one has nothing left to offer.
If battery life is a priority, the Marshall Stockwell III is rated for 40 hours versus 24 hours for the Sony SRS-XB43.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Marshall Stockwell III | Sony SRS-XB43 | |
|---|---|---|
| Price | $249.99 | $150 |
| Ranked | #56 of 78 in Large Size Portable Bluetooth Speakers | #42 of 78 in Large Size Portable Bluetooth Speakers |
| Drivers | 1x 3" woofer, 2x 1.75" wide-band drivers | 63mm woofer + 12.5mm tweeter + passive radiators |
| Frequency Response | 54Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 44W | 32W RMS |
| Battery Life | 40+ hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth Version | 5.3 | 5.0 |
| Bluetooth Codecs | SBC, AAC, LE Audio with LC3 | SBC, AAC, LDAC |
| IP Rating | IP55 | IP67 |
| Weight | 2.9 lbs (1.3 kg) | 6.5 lbs (2.95 kg) |
| Dimensions | 7.1" x 6.4" x 2.9" (180 x 162 x 74 mm) | 12.8" x 4.8" x 4.6" (325 x 123 x 117 mm) |
| App | Yes | Yes (Sony Music Center App) |
| EQ | Yes (parametric, via app) | Yes (3 band) |
| Aux Input | Yes | Yes |
| Digital Aux Input | No | No |
| Power Bank | Yes | Yes (USB-A, 5V/1A) |
| Power Input | USB-C | USB-C |
| Stereo | Partially | Yes |
| Omnidirectional | Yes | No |
| Bass Extension (-10dB) | - | 53Hz |
| Bluetooth Latency | - | 85ms |
| Maximum SPL | - | 99dB (measured by Alan Ross Reviews) |
| Party Mode | - | Yes (Party Connect up to 100 speakers) |
| Built-in Microphone | - | Yes |
| TWS | - | Yes |
| Lights | - | Yes |
Related Speaker Comparisons
How Sony SRS-XB43 compares with other leading options:
- Sony SRS-XB43 vs Vifa Helsinki
- JBL Xtreme 5 vs Sony SRS-XB43
- Tribit Stormbox Lava vs Sony SRS-XB43
- Sony SRS-XB43 vs Brane X
- Sony SRS-XB43 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
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) |
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Sony SRS-XB43: $150 eBay
Pros: Full, warm sound with deep, rich bass. Twin passive radiators deliver Extra Bass impact. IPX7 waterproof and rugged. Up to 24 hour battery (14 hours with lights on). Party lights for visual appeal. Measured bass extension of 53Hz (-10dB).
Cons: Not as loud as others in the category. Speaker will not remain at max volume and will turn itself down automatically.
Setup: Try out +3 +6 +3 as an EQ to get it as flat as possible as mentioned in the Alan Ross video
Full Sony SRS-XB43 review and specifications →
| Amplifier Power | 32W RMS |
|---|---|
| App | Yes (Sony Music Center App) |
| Aux Input | Yes |
| Bass Extension (-10dB) | 53Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Latency | 85ms |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.8" x 4.8" x 4.6" (325 x 123 x 117 mm) |
| Drivers | 63mm woofer + 12.5mm tweeter + passive radiators |
| EQ | Yes (3 band) |
| IP Rating | IP67 |
| Lights | Yes |
| Maximum SPL | 99dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/1A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 6.5 lbs (2.95 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: JBL Xtreme 3 vs Sony XB43 - boombox champ? More from alanrossreviews →
- Alan Ross Reviews: JBL Charge 5 vs Motion Boom vs Sony XB43 - a step to far? 🤪
- Alan Ross Reviews: Sony xb33 vs xb43 vs Soundcore Motion Plus speakers test
- DLX Willington: Who Sounds The Best Of Sony XG300, XB43 & JBL XTREME3 With Sound Sample BLIND CHALLENGE Reveal. More from DLXWillington →
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