These sit in different size classes, so this is not a straight ranking comparison. The Marshall Stockwell II ranks #11 of 120 large speakers by sound quality at $229.99; the Bose Soundlink Flex 2nd gen ranks #37 of 179 medium speakers by sound quality at $159.
The Marshall Stockwell II is the longer-running pick. A light, strap equipped speaker with some of the most natural sound around, even off to the side, and a long battery. It is rated for 20 hours of battery against 12 for the Bose Soundlink Flex 2nd gen. It keeps a wired aux input, which the Bose Soundlink Flex 2nd gen lacks. Watch for: Not very loud, and the added DSP reverb may annoy purists.
The Bose Soundlink Flex 2nd gen is the lighter, tougher pick. A small, rugged waterproof speaker with clear, well balanced mids, app EQ, aptX Adaptive and stereo pairing with a second unit. At 1.3 lbs (586 g) it weighs much less than the Marshall Stockwell II at 3.1 lbs (1.4 kg). It is rated IP67 against IPX4 for the Marshall Stockwell II. It supports aptX Adaptive Bluetooth, which the Marshall Stockwell II lacks. The tradeoff: One Flex remains mono and cannot deliver genuine low-bass rumble; RTINGS also found the elevated treble can turn hi-hats and other high-frequency detail piercing.
Buy the Marshall Stockwell II at $229.99 for a large speaker, or the Bose Soundlink Flex 2nd gen at $159 for a medium speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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Specifications Side By Side
| Marshall Stockwell II | Bose Soundlink Flex 2nd gen | |
|---|---|---|
| Price | $229.99 | $159.00 |
| Ranked | #11 of 120 in Large Size Portable Bluetooth Speakers | #37 of 179 in Medium Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Bass Extension (-10dB) | 44Hz | - |
| Battery Life | 20 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, aptX Adaptive |
| IP Rating | IPX4 | IP67 |
| Bluetooth Latency | 50ms | - |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | - |
| Party Mode | No | Yes (Bose Party mode) |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Yes | No |
| TWS | No | Yes |
| Weight | 3.1 lbs (1.4 kg) | 1.3 lbs (586 g) |
| App | No | Yes |
| Built-in Microphone | Yes | Yes |
| EQ | No | Yes (3 band) |
| Power Bank | No | - |
| Bluetooth Version | 5.0 | 5.3 |
| Dimensions | 7.1” x 6.3” x 2.8” (180 x 161 x 70 mm) | 7.9” x 3.5” x 2” (201 x 90 x 52 mm) |
| Drivers | 3” woofer, 2x 2” fullrange tweeters | 60mm full-range driver with passive radiators |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 20W | - |
| Digital Aux Input | No | No |
| Strap | Yes (built-in strap) | Yes (built-in loop) |
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