Short answer: the W-King D320 for features per dollar, the Megaboom 4 for build and battery. The D320 gives 40W output power, IP67 waterproofing, 24-hour battery life, a customizable EQ app with 6 preset modes, Bluetooth 5.3 and AUX and MicroSD support for $69.99. It is not stereo, though, and the Megaboom 4 answers with IP67, floats and USB-C charging for $200 while carrying a lot of distortion at higher volumes.
What the Ultimate Ears Megaboom 4 gets right: IP67 rated, floats, and finally uses USB-C charging. The catch: A lot of distortion at higher volumes.
On the W-King D320 side: 40W output power, IP67 waterproof, 24-hour battery life, customizable EQ app with 6 preset modes, Bluetooth 5.3, AUX and MicroSD support. The catch: Not stereo.
Buy the W-King D320. It ranks higher for sound quality than the Ultimate Ears Megaboom 4 and costs less, so the other one has nothing left to offer.
The Ultimate Ears Megaboom 4 is not a sound-quality pick. It sits near the bottom of the 142 medium speakers; there are better options higher up.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Ultimate Ears Megaboom 4 | W-King D320 | |
|---|---|---|
| Price | $200 | $69.99 |
| Ranked | #137 of 142 in Medium Size Portable Bluetooth Speakers | #46 of 142 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 20 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (PartyUp up to 50 speakers) | - |
| Stereo | No | No |
| Omnidirectional | Yes | No |
| Bluetooth Version | 5.1 | 5.3 |
| Dimensions | 3.4" x 3.4" x 8.9" (87 x 87 x 225 mm) | 3.3" x 8.4" (83 x 214 mm) (diameter x height) |
| Drivers | 2x 50x50mm full-range + 2x 55x86mm passive radiators | 52mm x 91mm woofer, 2x 25mm tweeters + 2x passive radiators |
| TWS | Yes | No |
| EQ | Yes (via app) | Yes |
| Power Input | USB-C | USB-C |
| Built-in Microphone | No | Yes |
| Weight | 2.4 lbs (1.1 kg) | 3.1 lbs (1.4 kg) |
| Maximum SPL | 91dB (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Aux Input | No | Yes |
| MicroSD Playback | - | Yes |
| Frequency Response | - | 100Hz - 18kHz (Manufacturer specified) |
| Amplifier Power | - | 40W |
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Prices on this page were last checked September 22, 2026 at 5:11 AM 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
Ultimate Ears Megaboom 4: $200 Amazon eBay
Pros: IP67 rated, floats, and finally uses USB-C charging. 20 hour battery life. ‘PartyUp’ feature syncs multiple UE speakers together.
Cons: A lot of distortion at higher volumes. Rolled off treble. Not very loud. They really screwed this up
Full Ultimate Ears Megaboom 4 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 3.4" x 3.4" x 8.9" (87 x 87 x 225 mm) |
| Drivers | 2x 50x50mm full-range + 2x 55x86mm passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 91dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | Yes (PartyUp up to 50 speakers) |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 2.4 lbs (1.1 kg) |
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W-King D320: $69.99 Amazon Aliexpress 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 →
| Amplifier Power | 40W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 24 hours (Manufacturer specified) |
| 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
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