Short answer: the W-King D320. It ranks #51 of 175 medium speakers by sound quality, rated 3.6/5, at $52.92; the Ultimate Ears Boom 3 ranks #114, rated 2.9/5, and costs $134.99, so there is little reason to consider the other one.
The W-King D320 is the better-sounding, longer-running choice. A 3.1 lbs (1.4 kg), IP67-rated travel speaker with claimed 40W output, USB-C charging, aux and microSD playback, speakerphone capability and an app with adjustable EQ. It is rated for 24 hours of battery against 15 for the Ultimate Ears Boom 3. It keeps a wired aux input, which the Ultimate Ears Boom 3 lacks. It charges over USB-C rather than Micro USB. The catch: A single D320 is not stereo, and its warm balance trades away some detail and upper-treble air.
The Ultimate Ears Boom 3 is the lighter option. Rich and warm bass without muddying mix, crisp highs, excellent 15-hour battery life, stable Bluetooth connectivity, IP67 rated and floats, rugged fabric shell, can pair up to 150 speakers via PartyUp. At 1.3 lbs (608 g) it weighs much less than the W-King D320 at 3.1 lbs (1.4 kg). It plays in stereo from a single unit, unlike the W-King D320. The tradeoff: Not stereo, barely any bass, recessed treble.
Buy the W-King D320. It is rated higher for sound quality than the Ultimate Ears Boom 3 and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| W-King D320 | Ultimate Ears Boom 3 | |
|---|---|---|
| Price | $52.92 | $134.99 |
| Ranked | #51 of 175 in Medium Size Portable Bluetooth Speakers | #114 of 175 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (Ultimate Ears BOOM & MEGABOOM app) |
| Aux Input | Yes | No |
| Battery Life | 24 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Built-in Microphone | Yes | No |
| EQ | Yes | Yes (via app) |
| IP Rating | IP67 | IP67 |
| MicroSD Playback | Yes | - |
| Stereo | No | Yes |
| Omnidirectional | No | Yes |
| TWS | No | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 4.2 |
| Dimensions | 3.3” x 8.4” (83 x 214 mm) (diameter x height) | 7.2” x 2.9” (184 x 73 mm) |
| Drivers | 52mm x 91mm woofer, 2x 25mm tweeters + 2x passive radiators | 2x 2” active drivers + 2x 2” x 4” passive radiators |
| Frequency Response | 100Hz - 18kHz (Manufacturer specified) | - |
| Power Input | USB-C | Micro USB |
| Amplifier Power | 40W | - |
| Weight | 3.1 lbs (1.4 kg) | 1.3 lbs (608 g) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Bass Extension (-10dB) | - | 91Hz |
| Party Mode | - | Yes (PartyUp up to 50 speakers) |
| Maximum SPL | - | 87dB (Manufacturer specified) |
| Strap | - | Yes (built-in loop) |
Related Speaker Comparisons
How W-King D320 compares with other leading options:
- EarFun Uboom L vs W-King D320
- Soundcore Motion 300 vs W-King D320
- Soundcore Motion+ vs W-King D320
- Soundcore Boost “upgraded” 2021 vs W-King D320
- Minirig 4 vs W-King D320
Prices on this page were last checked October 12, 2026 at 4:13 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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The Two Speakers In Full
W-King D320: $52.92 AliExpress $52.92 eBay
Pros: A 1.4kg, IP67-rated travel speaker with claimed 40W output, USB-C charging, aux and microSD playback, speakerphone capability and an app with adjustable EQ. Owner reports praise its loud, deep-for-size bass and long runtime, while its two tweeters and passive radiators make it a capable choice for casual outdoor listening.
Cons: A single D320 is not stereo, and its warm balance trades away some detail and upper-treble air. The claimed 100Hz low-frequency specification suggests that its perceived bass should not be mistaken for true sub-bass; evaluate its tuning with the app rather than expecting a neutral default.
Full W-King D320 review and specifications →
| Released | Aug 2023 (3 years ago) |
|---|---|
| Amplifier Power | 40W |
| App | Yes |
| Aux Input | Yes |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 3.3” x 8.4” (83 x 214 mm) (diameter x height) |
| Drivers | 52mm x 91mm woofer, 2x 25mm tweeters + 2x passive radiators |
| EQ | Yes |
| Frequency Response | 100Hz - 18kHz (Manufacturer specified) |
| IP Rating | IP67 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | No |
| Weight | 3.1 lbs (1.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Techder Audios: W-king D320 VS Mifa Wildrod "DUAL VS SINGLE TWEETERS!" More from techderaudios →
- Jay’s Straight Up Reviews & More: Ultimate Ears MegaBoom 4 vs W-King D320 🔋Does Paying More Get You Less? 😧 More from JaysStraightUpReviews →
- Audio y Mas 🔊: Altavoces JBL Flip 6 vs W-King D320: ¿Cuál es el mejor en calidad de sonido? 🔊
- Head-to-Head Comparisons
Ultimate Ears Boom 3: $134.99 Amazon $134.99 eBay
Newer model: the Ultimate Ears Boom 4, ranked higher, rated 2.9/5, released Jun 2024. See every Ultimate Ears Wonderboom, Boom and Megaboom generation.
Pros: Rich and warm bass without muddying mix, crisp highs, excellent 15-hour battery life, stable Bluetooth connectivity, IP67 rated and floats, rugged fabric shell, can pair up to 150 speakers via PartyUp. Measured bass extension of 91Hz (-10dB).
Cons: Not stereo, barely any bass, recessed treble. You can tell from the micro USB that they are just feeding you the same crap hardware over and over, this is inexcusable for a product released in 2021. Lots of mentions of failing batteries on amazon. Not technically a 360 speaker, only front and rear.
Full Ultimate Ears Boom 3 review and specifications →
| Released | Sep 2018 (8 years ago) |
|---|---|
| App | Yes (Ultimate Ears BOOM & MEGABOOM app) |
| Aux Input | No |
| Bass Extension (-10dB) | 91Hz |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2” x 2.9” (184 x 73 mm) |
| Drivers | 2x 2” active drivers + 2x 2” x 4” passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 87dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | Yes (PartyUp up to 50 speakers) |
| Power Input | Micro USB |
| Stereo | Yes |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 1.3 lbs (608 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Ultimate Ears Boom 3 vs Ultimate Ears Boom 4
- Ultimate Ears Boom 3 vs Klipsch Groove
- Ultimate Ears Boom 3 vs Ultimate Ears Wonderboom
- Ultimate Ears Boom 3 vs Ultimate Ears Wonderboom 2
- Ultimate Ears Boom 3 vs Sony SRS-XE300
- Ultimate Ears Boom 3 vs Ultimate Ears Wonderboom 3
- Ultimate Ears Boom 3 vs Tribit Stormbox
- Ultimate Ears Boom 3 vs Ultimate Ears Wonderboom 4
- See all 99 comparisons