Short answer: the Marshall Middleton II. It ranks #31 of 115 large speakers by sound quality, rated 4.1/5, at $279.99. The Marshall Stockwell III ranks #79, rated 3.0/5, at $249.99, $30 cheaper, a saving that is not big enough to make up the sound-quality gap.
The Marshall Middleton II is the better-sounding, tougher choice. A waterproof stereo speaker with very deep bass for its size, a long battery, a power bank and an app EQ. It is rated IP67 against IP55 for the Marshall Stockwell III. The catch: Bass boosted which drowns out the midrange.
The Marshall Stockwell III is the longer-running, lighter option. A stylish, rugged speaker with a very long battery you can swap yourself, a detailed app EQ, and power bank charging. It is rated for 40 hours of battery against 30 for the Marshall Middleton II. At 2.9 lbs (1.3 kg) it weighs noticeably less than the Marshall Middleton II at 4 lbs (1.8 kg). It supports AAC Bluetooth, which the Marshall Middleton II lacks. The tradeoff: Highs are recessed by default and need the treble control maxed to compensate, still lacking detail even then.
Buy the Marshall Middleton II. It is rated higher for sound quality, and saving $30 with the Marshall Stockwell III does not make up for the sound-quality gap.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A waterproof stereo speaker with very deep bass for its size, a long battery, a power bank and an app EQ.
A stylish, rugged speaker with a very long battery you can swap yourself, a detailed app EQ, and power bank charging.
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Specifications Side By Side
| Marshall Middleton II | Marshall Stockwell III | |
|---|---|---|
| Price | $279.99 | $249.99 |
| Ranked | #31 of 115 in Large Size Portable Bluetooth Speakers | #79 of 115 in Large Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 38Hz | - |
| Battery Life | 30 hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| Built-in Microphone | Yes | - |
| EQ | Yes (5 band) | Yes (parametric, via app) |
| IP Rating | IP67 | IP55 |
| Party Mode | Yes (Marshall Stack) | - |
| Power Bank | Yes (USB-C) | Yes |
| Power Input | USB-C | USB-C |
| Weight | 4 lbs (1.8 kg) | 2.9 lbs (1.3 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LE Audio with LC3 |
| Stereo | Yes | Partially |
| Omnidirectional | No | Yes |
| TWS | Yes | No |
| Bluetooth Version | 5.3 | 5.3 |
| Dimensions | 9.1” x 3.9” x 4.3” (230 x 98 x 110 mm) | 7.1” x 6.4” x 2.9” (180 x 162 x 74 mm) |
| Drivers | 2x 75mm woofers, 2x 0.625” tweeters + 2x passive radiators | 1x 3” woofer, 2x 1.75” wide-band drivers |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | 54Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 80W | 44W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable strap) | Yes (detachable strap) |
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