Short answer: the Marshall Stockwell III. Both are rated 3.0/5 for sound quality (#59 and #60 of 82 large speakers), and the Marshall Stockwell III costs $249.99 against $330 for the Turtlebox Cub, with sound quality a draw, the lower price decides it.
The Stockwell III sounds muffled by default, with recessed highs even with the treble maxed, boomy bass, and harshness well below maximum volume. The Cub has only listening impressions so far: loud for its size, warm and bass-forward, with some bass loss at high volume.
The Cub is tougher, IP67 and crush resistant against the Stockwell III’s IP55. The Stockwell III is lighter, at 1.3 kg against 2.4 kg.
Battery favors the Marshall: over 40 hours claimed, with a user-replaceable battery, against 14+ for the Cub. The Stockwell III also has an aux input and a parametric app EQ. Both have a power bank.
Buy the Marshall Stockwell III. Both are rated the same for sound quality, and it costs $80.01 less than the Turtlebox Cub.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Turtlebox Cub | Marshall Stockwell III | |
|---|---|---|
| Price | $330.00 | $249.99 |
| Ranked | #60 of 82 in Large Size Portable Bluetooth Speakers | #59 of 82 in Large Size Portable Bluetooth Speakers |
| Drivers | 1x 4.5” (114mm) woofer + 1x 1.3” (33mm) titanium tweeter | 1x 3” woofer, 2x 1.75” wide-band drivers |
| Battery Life | 14+ hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| IP Rating | IP67 | IP55 |
| Weight | 5.3 lbs (2.4 kg) | 2.9 lbs (1.3 kg) |
| Dimensions | 8.6”H x 7.2”W x 5.7”D (218 x 183 x 146 mm) | 7.1” x 6.4” x 2.9” (180 x 162 x 74 mm) |
| Power Bank | Yes (USB-C) | Yes |
| Power Input | USB-C | USB-C |
| Party Mode | Yes (Party Mode) | - |
| TWS | Yes | No |
| Stereo | No | Partially |
| Omnidirectional | No | Yes |
| Frequency Response | - | 54Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | - | 44W |
| Bluetooth Version | - | 5.3 |
| Bluetooth Codecs | - | SBC, AAC, LE Audio with LC3 |
| App | - | Yes |
| EQ | - | Yes (parametric, via app) |
| Aux Input | - | Yes |
| Digital Aux Input | - | No |
| Strap | - | Yes (detachable strap) |
Related Speaker Comparisons
More top alternatives to 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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
Turtlebox Cub: $330.00 Amazon eBay
Pros: A compact, cube-shaped Turtlebox at 2.4 kg with a real two-way layout: a 4.5 inch woofer and a 1.3 inch titanium tweeter. Reviewers found it very loud for its size, with warm, bass-forward tuning and a bit more bass than the Turtlebox Ranger. IP67 waterproof and dustproof, crush and drop resistant, stainless steel tie-downs, a claimed 14+ hours from a 49.95Wh battery, USB-C charging with a power bank output, stereo pairing and Party Mode.
Cons: The evidence so far is listening impressions from two reviews, with no measurements or side by side tests against other brands. One reviewer found it loses bass at high volume, and it is not as loud as the full-size Turtlebox. Turtlebox’s claimed 118dB is a figure the brand’s larger speakers have not come close to at a standard one meter distance. It is also mono from one unit, and its recessed USB-C port only fits slim cable plugs.
Full Turtlebox Cub review and specifications →
| Battery Life | 14+ hours (Manufacturer specified) |
|---|---|
| Dimensions | 8.6”H x 7.2”W x 5.7”D (218 x 183 x 146 mm) |
| Drivers | 1x 4.5” (114mm) woofer + 1x 1.3” (33mm) titanium tweeter |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Party Mode) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 5.3 lbs (2.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Turtlebox Cub vs Sony ULT Field 5
- Turtlebox Cub vs JBL Xtreme 4
- Turtlebox Cub vs Marshall Middleton
- Turtlebox Cub vs Bose SoundLink Plus
- Turtlebox Cub vs Teufel Rockster Cross 2
- Turtlebox Cub vs Bose SoundLink Max
- Turtlebox Cub vs Soundcore Boom 2
- Turtlebox Cub vs Tribit Stormbox Lava
- See all 13 comparisons
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
- Marshall Stockwell III vs Xdobo X8 Max
- Marshall Stockwell III vs Klipsch Detroit
- Marshall Stockwell III vs Ultimate Ears Epicboom
- Marshall Stockwell III vs Doss Soundbox XL
- Marshall Stockwell III vs Dali Katch G2
- Marshall Stockwell III vs Tronsmart Halo 100
- Marshall Stockwell III vs B&O Beosound Level
- Marshall Stockwell III vs LG PN7
- See all 60 comparisons