Short answer: the Soundcore Motion Boom offers far more output, bass and outdoor utility, while the Marshall Stockwell II is the smaller speaker with an aux input and a more refined portable form. Stockwell has a 20-hour claimed battery, a compact 3.1 lbs (1.4 kg) body and a 44Hz bass specification, but no app or EQ and only IPX4 protection. The Soundcore Motion Boom is discontinued; its replacement is the Soundcore Boom 2.
The Motion Boom costs $109.99, reaches a claimed 106dB, has stereo drivers, BassUp, app EQ, 24-hour claimed battery, USB power bank output and a buoyant IPX7 cabinet. It is not as neutral or detailed as the best portable speakers, but it is built for much more scale than Stockwell.
Choose Stockwell for small-room listening and aux sources. Choose Motion Boom if you actually want a loud, weather-resistant outdoor speaker.
Buy the Marshall Stockwell II if compact size, aux input and its distinctive portable design matter more than volume.
Buy the Soundcore Motion Boom if you want louder stereo sound, stronger bass, app EQ and IPX7 outdoor protection.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| Marshall Stockwell II | Soundcore Motion Boom | |
|---|---|---|
| Price | $229.99 | $109.99 Discontinued |
| Ranked | #11 of 120 in Large Size Portable Bluetooth Speakers | #14 of 120 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Bass Extension (-10dB) | 44Hz | 53Hz |
| Battery Life | 20 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| IP Rating | IPX4 | IPX7 |
| Bluetooth Latency | 50ms | 170ms |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | 106dB (measured by Alan Ross Reviews) |
| Party Mode | No | No |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Yes | No |
| TWS | No | Yes |
| Weight | 3.1 lbs (1.4 kg) | 3.3 lbs (1.5 kg) |
| App | No | Yes |
| Built-in Microphone | Yes | Yes |
| EQ | No | Yes |
| Power Bank | No | Yes (USB-A) |
| Bluetooth Version | 5.0 | 5.0 |
| Dimensions | 7.1” x 6.3” x 2.8” (180 x 161 x 70 mm) | 13.6” x 7.9” x 5.8” (346 x 200 x 148 mm) |
| Drivers | 3” woofer, 2x 2” fullrange tweeters | 2x 63.5mm titanium fullrange drivers + 2x passive radiators |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 20W | 30W |
| Digital Aux Input | No | No |
| Strap | Yes (built-in strap) | - |
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