Short answer: the W-King D320 for features, the Bose Soundlink Flex 2nd gen for simplicity. The D320 packs 40W, IP67 waterproofing, 24 hour battery life, an EQ app with 6 modes, Bluetooth 5.3, AUX and MicroSD, dual tweeters with passive radiators and USB-C, but it is not stereo, has a warm tuning, lacks some detail and has rolled off treble. The Flex 2nd gen is not stereo and its warm, overly boosted bass drowns out midrange detail.
The case for the Bose Soundlink Flex 2nd gen: It sounds pretty much identical to the 1st gen. The catch: it’s not stereo, sounds warm with overly boosted bass that drowns out midrange detail, and self drains the battery about 10% a week.
Buy the Bose Soundlink Flex 2nd gen when sound quality outweighs the price for you, and the W-King D320 when the price outweighs sound quality instead.
If battery life is a priority, the W-King D320 is rated for 24 hours versus 12 hours for the Bose Soundlink Flex 2nd gen.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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Specifications Side By Side
| Bose Soundlink Flex 2nd gen | W-King D320 | |
|---|---|---|
| Price | $159.00 | $52.92 |
| Ranked | #37 of 179 in Medium Size Portable Bluetooth Speakers | #49 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes (3 band) | Yes |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Bose Party mode) | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | No |
| Weight | 1.3 lbs (586 g) | 3.1 lbs (1.4 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.3 |
| Dimensions | 7.9” x 3.5” x 2” (201 x 90 x 52 mm) | 3.3” x 8.4” (83 x 214 mm) (diameter x height) |
| Aux Input | No | Yes |
| Drivers | 60mm full-range driver with passive radiators | 52mm x 91mm woofer, 2x 25mm tweeters + 2x passive radiators |
| Bluetooth Codecs | SBC, AAC, aptX Adaptive | SBC (inferred; additional codecs unverified) |
| Digital Aux Input | No | No |
| Strap | Yes (built-in loop) | - |
| MicroSD Playback | - | Yes |
| Frequency Response | - | 100Hz - 18kHz (Manufacturer specified) |
| Amplifier Power | - | 40W |
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