Short answer: the Marshall Stockwell III. It ranks #59 of 82 large speakers by sound quality, rated 3.0/5, at $249.99. The Treblab HD-Max ranks #73, rated 2.4/5, at $129.97, $120.02 cheaper, which does not close the gap in sound quality.
The case for the Marshall Stockwell III: 40+ hour battery life with a user-replaceable battery, strap, sleeve and grilles. The tradeoff: Highs are recessed by default and need the treble control maxed to compensate, still lacking detail even then.
The case for the Treblab HD-Max: 50W incredibly loud for size with four monstrous drivers, tested 22.4-hour battery (25+ hours at 50% volume). The tradeoff: Boosted upper bass, not much lower bass.
Buy the Marshall Stockwell III. It is rated higher for sound quality, and the $120.02 you would save on the Treblab HD-Max does not close the gap.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Marshall Stockwell III | Treblab HD-Max | |
|---|---|---|
| Price | $249.99 | $129.97 |
| Ranked | #59 of 82 in Large Size Portable Bluetooth Speakers | #73 of 82 in Large Size Portable Bluetooth Speakers |
| Drivers | 1x 3” woofer, 2x 1.75” wide-band drivers | 2x 75mm woofers, 2x 30mm tweeters |
| Frequency Response | 54Hz - 20kHz (Manufacturer specified) | 30Hz - 16kHz (Manufacturer specified) |
| Amplifier Power | 44W | 60W |
| Battery Life | 40+ hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Bluetooth Version | 5.3 | 5.3 |
| Bluetooth Codecs | SBC, AAC, LE Audio with LC3 | SBC |
| IP Rating | IP55 | IPX6 |
| Weight | 2.9 lbs (1.3 kg) | 5.1 lbs (2.3 kg) |
| Dimensions | 7.1” x 6.4” x 2.9” (180 x 162 x 74 mm) | 12.2” x 5.3” x 5.6” (310 x 135 x 143 mm) |
| App | Yes | No |
| EQ | Yes (parametric, via app) | No |
| Aux Input | Yes | Yes |
| Digital Aux Input | No | No |
| Power Bank | Yes | Yes (USB-A, 5V) |
| Power Input | USB-C | USB-C |
| Stereo | Partially | Yes |
| Omnidirectional | Yes | No |
| TWS | No | Yes |
| Strap | Yes (detachable strap) | - |
| Bass Extension (-10dB) | - | ~60Hz |
| Built-in Microphone | - | Yes |
| Party Mode | - | No |
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More worthwhile head-to-heads for Marshall Stockwell III:
- Marshall Stockwell III vs Vifa Helsinki
- Marshall Stockwell III vs JBL Xtreme 5
- Marshall Stockwell III vs Tribit Stormbox Lava
- Marshall Stockwell III vs Brane X
- Marshall Stockwell III vs Minirig 4 with subwoofer
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
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
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Treblab HD-Max: $129.97 Amazon eBay
Pros: 50W incredibly loud for size with four monstrous drivers, tested 22.4-hour battery (25+ hours at 50% volume). IPX6 water-resistant for elements exposure. Power bank feature with 10W USB-A output for device charging. Three sound modes with unique EQ properties. Excellent construction, well-made components. Measured bass extension of ~60Hz (-10dB).
Cons: Boosted upper bass, not much lower bass. Only IPX6 water rating
Full Treblab HD-Max review and specifications →
| Amplifier Power | 60W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~60Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.2” x 5.3” x 5.6” (310 x 135 x 143 mm) |
| Drivers | 2x 75mm woofers, 2x 30mm tweeters |
| EQ | No |
| Frequency Response | 30Hz - 16kHz (Manufacturer specified) |
| IP Rating | IPX6 |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A, 5V) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 5.1 lbs (2.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons