Short answer: the W-King D8 Mini. It ranks #106 of 136 medium speakers by sound quality at $38.93; the Ultimate Ears Megaboom 4 ranks #132 and costs $200, so there is little reason to consider the other one.
What the W-King D8 Mini offers: 30W output with switchable indoor/outdoor EQ modes. IPX6 rated with a 5000mAh battery. Watch for: Recessed midrange, harsh treble. Bass doesn’t go as deep as others.
What the Ultimate Ears Megaboom 4 offers: IP67 rated, floats, and finally uses USB-C charging. 20 hour battery life. ‘PartyUp’ feature syncs multiple UE speakers together. Watch for: A lot of distortion at higher volumes. Rolled off treble. Not very loud. They really screwed this up
Buy the W-King D8 Mini. It ranks higher for sound quality than the Ultimate Ears Megaboom 4 and costs less, so the other one has nothing left to offer.
Neither of these is a sound-quality pick. Look higher up the 136 medium speakers if that is what you are optimizing for.
Specifications Side By Side
| W-King D8 Mini | Ultimate Ears Megaboom 4 | |
|---|---|---|
| Price | $38.93 | $200 |
| Ranked | #106 of 136 in Medium Size Portable Bluetooth Speakers | #132 of 136 in Medium Size Portable Bluetooth Speakers |
| Aux Input | Yes | - |
| Bass Extension (-10dB) | 63Hz | - |
| Battery Life | 24 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Max Volume | 100dB | 91dB |
| MicroSD Playback | Yes | - |
| TWS | No | Yes |
| Weight | 2.8 lbs / 1260 g | 2.4 lbs / 1.1 kg |
| IP Rating | IPX6 | IP67 |
| Bluetooth Version | 5.0 | 5.1 |
| Dimensions | 9.9" x 3.7" x 3.7" (251 x 94 x 94 mm) | 3.4" x 3.4" x 8.9" (87 x 87 x 225 mm) |
| Drivers | 2x 70mm woofers, 2x 30mm tweeters | 2x 50x50mm full-range + 2x 55x86mm passive radiators |
| Built in Microphone | Yes | No |
| Stereo | Yes | No |
| Omnidirectional | No | Yes |
| Power Input | USB-C | USB-C |
| Output Power | 30W | - |
| Digital Aux Input | No | No |
| App | - | Yes |
| Party Mode | - | Yes (PartyUp up to 50 speakers) |
| EQ | - | Yes (via app) |
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Prices on this page were last checked August 27, 2026 at 10:09 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 D8 Mini: $38.93 Aliexpress eBay
Pros: 30W output with switchable indoor/outdoor EQ modes. IPX6 rated with a 5000mAh battery.
Cons: Recessed midrange, harsh treble. Bass doesn’t go as deep as others.
Full W-King D8 Mini review and specifications →
| Aux Input | Yes |
|---|---|
| Bass Extension (-10dB) | 63Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Version | 5.0 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9.9" x 3.7" x 3.7" (251 x 94 x 94 mm) |
| Drivers | 2x 70mm woofers, 2x 30mm tweeters |
| IP Rating | IPX6 |
| Max Volume | 100dB |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Output Power | 30W |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | No |
| Weight | 2.8 lbs / 1260 g |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- W-King D8 Mini vs Soundcore Flare 2
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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 |
|---|---|
| Battery Life | 20 hours (Manufacturer specified) |
| 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 |
| Max Volume | 91dB |
| 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 |
- Links
- Reviews, Comparisons and Sound Samples
- Jay’s Straight Up Reviews & More: Ultimate Ears MegaBoom 4 vs Sony ULT Field 1 😧 $200 vs $128 Cylinder Bluetooth Speaker Matchup More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: Ultimate Ears MegaBoom 4 vs W-King D320 🔋Does Paying More Get You Less? 😧
- Reddit Search for Ultimate Ears Megaboom 4 Review
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