Short answer: the Bose Soundlink Flex 2nd gen. It ranks #37 of 172 medium speakers by sound quality, rated 3.8/5, at $159. The DOSS E-Go II ranks #142, rated 2.5/5, at $39.90, $119.10 cheaper, a saving that is not big enough to make up the sound-quality gap.
The Bose Soundlink Flex 2nd gen is the better-sounding choice. A very portable 1.3 lbs (586 g), IP67-rated speaker with a clear, well-balanced midrange that keeps voices and instruments intelligible. It has an adjustable EQ, which the DOSS E-Go II lacks. It charges over USB-C rather than Micro USB. Watch for: 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.
The DOSS E-Go II is the lighter option. A water bottle sized 0.9 lbs (399 g) stereo speaker with IPX6 waterproofing, a 12-hour battery and fast Bluetooth pairing. At 0.9 lbs (399 g) it weighs noticeably less than the Bose Soundlink Flex 2nd gen at 1.3 lbs (586 g). It keeps a wired aux input, which the Bose Soundlink Flex 2nd gen lacks. It plays in stereo from a single unit, unlike the Bose Soundlink Flex 2nd gen. The tradeoff: Horribly bad unless turned up, still not great.
Buy the Bose Soundlink Flex 2nd gen. It is rated higher for sound quality, and saving $119.10 with the DOSS E-Go II does not make up for the sound-quality gap.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A very portable 586g, IP67-rated speaker with a clear, well-balanced midrange that keeps voices and instruments intelligible.
Amazon $159.00 eBay
A water bottle sized 399 g stereo speaker with IPX6 waterproofing, a 12-hour battery and fast Bluetooth pairing.
Amazon $39.90 eBayPrices on this page were last checked October 17, 2026 at 6:04 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
| Bose Soundlink Flex 2nd gen | DOSS E-Go II | |
|---|---|---|
| Price | $159.00 | $39.90 |
| Ranked | #37 of 172 in Medium Size Portable Bluetooth Speakers | #142 of 172 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes (3 band) | No |
| IP Rating | IP67 | IPX6 |
| Party Mode | Yes (Bose Party mode) | - |
| Power Input | USB-C | Micro USB |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | No |
| Weight | 1.3 lbs (586 g) | 0.9 lbs (399 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 4.1 |
| Dimensions | 7.9” x 3.5” x 2” (201 x 90 x 52 mm) | 7.8” x 2.5” x 2” (198 x 63 x 51 mm) |
| Aux Input | No | Yes |
| Drivers | 60mm full-range driver with passive radiators | 2x 6W full-range drivers + 1x passive radiator |
| Bluetooth Codecs | SBC, AAC, aptX Adaptive | SBC (inferred; additional codecs unverified) |
| Digital Aux Input | No | No |
| Strap | Yes (built-in loop) | Yes (strap) |
| Bass Extension (-10dB) | - | 120Hz |
| MicroSD Playback | - | Yes |
| Amplifier Power | - | 12W |
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