Bose Soundlink Flex 2nd gen vs W-King D320

Last updated: August 13, 2026

Short answer: the Bose Soundlink Flex 2nd gen for better sound quality, the W-King D320 for the lower price. The Bose Soundlink Flex 2nd gen ranks #33 of 135 medium speakers at $129.99. The W-King D320 ranks #44 at $52.92, $77.07 cheaper.

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.

What the W-King D320 gets right: It packs 40W of output power, IP67 waterproofing, 24 hour battery life, a customizable EQ app with 6 preset modes, Bluetooth 5.3, AUX and MicroSD support, dual tweeters with passive radiators, and USB-C charging. Set against that: it’s not stereo, has a warm tuning, is lacking some detail, and has rolled off treble.

Buy the Bose Soundlink Flex 2nd gen if sound quality matters more than the price. Buy the W-King D320 if the price matters more than sound quality.

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.

Bose Soundlink Flex 2nd gen vs W-King D320

Specifications Side By Side

Bose Soundlink Flex 2nd gen W-King D320
Price$129.99$52.92
Ranked#33 of 135 in Medium Size Portable Bluetooth Speakers#44 of 135 in Medium Size Portable Bluetooth Speakers
AppYesYes
Battery Life12 hours (Manufacturer specified)24 hours (Manufacturer specified)
Built in MicrophoneYesYes
EQYes (3 band)Yes
IP RatingIP67IP67
Party ModeYes (Bose Party mode)-
Power InputUSB-CUSB-C
StereoNoNo
TWSYesNo
Weight1.3 lbs / 586 g3.1 lbs / 1.4 kg
Bluetooth Version5.35.3
Dimensions7.9" x 3.5" x 2" (201 x 90 x 52 mm)3.3" x 8.4" (83 x 214 mm) (diameter x height)
Aux InputNoYes
Drivers60mm full-range driver with passive radiators52mm x 91mm woofer, 2x 25mm tweeters + 2x passive radiators
Bluetooth CodecsSBC, AAC, aptX Adaptive-
Digital Aux InputNoNo
MicroSD Playback-Yes
Frequency Response-100Hz - 18kHz (Manufacturer specified)
Output Power-40W

The Two Speakers In Full

Bose Soundlink Flex 2nd gen ranking card

Pros: Pretty much identical sounding to the 1st gen

Cons: Not stereo. Warm sounding with overly boosted bass which drowns out midrange detail. Self drains the battery about 10% a week.

AppYes
Aux InputNo
Battery Life12 hours (Manufacturer specified)
Bluetooth CodecsSBC, AAC, aptX Adaptive
Bluetooth Version5.3
Built in MicrophoneYes
Digital Aux InputNo
Dimensions7.9" x 3.5" x 2" (201 x 90 x 52 mm)
Drivers60mm full-range driver with passive radiators
EQYes (3 band)
IP RatingIP67
Party ModeYes (Bose Party mode)
Power InputUSB-C
StereoNo
TWSYes
Weight1.3 lbs / 586 g

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W-King D320: $52.92 Aliexpress Amazon

W-King D320 ranking card

Pros: 40W output power, IP67 waterproof, 24-hour battery life, customizable EQ app with 6 preset modes, Bluetooth 5.3, AUX and MicroSD support, dual tweeters with passive radiators, USB-C charging

Cons: Not stereo. Warm tuning. Lacking some detail. Rolled off treble

AppYes
Aux InputYes
Battery Life24 hours (Manufacturer specified)
Bluetooth Version5.3
Built in MicrophoneYes
Digital Aux InputNo
Dimensions3.3" x 8.4" (83 x 214 mm) (diameter x height)
Drivers52mm x 91mm woofer, 2x 25mm tweeters + 2x passive radiators
EQYes
Frequency Response100Hz - 18kHz (Manufacturer specified)
IP RatingIP67
MicroSD PlaybackYes
Output Power40W
Power InputUSB-C
StereoNo
TWSNo
Weight3.1 lbs / 1.4 kg

As an eBay Partner, we may be compensated if you make a purchase.