Short answer: the Ultimate Ears Wonderboom 4, though neither ranks well in its class. It ranks #109 of 175 medium speakers by sound quality, rated 2.9/5, at $74.50. The W-King D8 Mini ranks #135, rated 2.6/5, at $49.99, $24.51 cheaper, which does not close the gap in sound quality. Both are rated below 3.0/5 among the 175 medium speakers, so if sound quality matters, consider the EarFun Uboom L instead, ranked #2 at $49.79.
The Ultimate Ears Wonderboom 4 is the lighter pick. At 0.9 lbs (420 g) it weighs much less than the W-King D8 Mini at 2.8 lbs (1.26 kg). The catch: Bass isn’t as deep as the top-ranked speakers and is a little thuddy.
The W-King D8 Mini is the longer-running option. 30W output with switchable indoor/outdoor EQ modes. It is rated for 24 hours of battery against 14 for the Ultimate Ears Wonderboom 4. It keeps a wired aux input, which the Ultimate Ears Wonderboom 4 lacks. It has an adjustable EQ, which the Ultimate Ears Wonderboom 4 lacks. Watch for: Recessed midrange, harsh treble.
Buy the Ultimate Ears Wonderboom 4. It is rated higher for sound quality, and the $24.51 you would save on the W-King D8 Mini does not close the gap.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Ultimate Ears Wonderboom 4 | W-King D8 Mini | |
|---|---|---|
| Price | $74.50 | $49.99 |
| Ranked | #109 of 175 in Medium Size Portable Bluetooth Speakers | #135 of 175 in Medium Size Portable Bluetooth Speakers |
| Battery Life | 14 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Maximum SPL | 87dB (Manufacturer specified) | 100dB (measured by Alan Ross Reviews) |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Yes | No |
| Weight | 0.9 lbs (420 g) | 2.8 lbs (1260 g) |
| IP Rating | IP67 | IPX6 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.2 | 5.0 |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) | 9.9” x 3.7” x 3.7” (251 x 94 x 94 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) | 2x 70mm woofers, 2x 30mm tweeters |
| TWS | Yes | No |
| Party Mode | No | - |
| App | No | No |
| EQ | No | Yes (2 modes - Indoor/Outdoor) |
| Built-in Microphone | No | Yes |
| Power Bank | No | - |
| Aux Input | No | Yes |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Strap | Yes (built-in loop) | - |
| Bass Extension (-10dB) | - | 63Hz |
| MicroSD Playback | - | Yes |
| Amplifier Power | - | 30W |
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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
Ultimate Ears Wonderboom 4: $74.50 Amazon $74.50 eBay
Older models: the Ultimate Ears Wonderboom 3 (ranked lower, rated 2.9/5), the Ultimate Ears Wonderboom 2 (ranked lower, rated 2.9/5) and the Ultimate Ears Wonderboom (ranked lower, rated 2.9/5). See every Ultimate Ears Wonderboom, Boom and Megaboom generation.
Same family: the Ultimate Ears Boom 4 (larger model, ranked lower, rated 2.9/5) and the Ultimate Ears Megaboom 4 (larger model, ranked lower, rated 2.1/5).
Pros: Small size.
Cons: Bass isn’t as deep as the top-ranked speakers and is a little thuddy. Not much improvement over the previous Ultimate Ears Wonderboom 3 besides the USB-C charging port.
Full Ultimate Ears Wonderboom 4 review and specifications →
| Released | Jun 2024 (2 years ago) |
|---|---|
| App | No |
| Aux Input | No |
| Battery Life | 14 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| EQ | No |
| IP Rating | IP67 |
| Maximum SPL | 87dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 0.9 lbs (420 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Wonderboom 3
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Megaboom 3
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Wonderboom 2
- Ultimate Ears Wonderboom 4 vs LG Xboom Grab
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Wonderboom
- Ultimate Ears Wonderboom 4 vs Soundcore 2
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Boom 4
- Ultimate Ears Wonderboom 4 vs Tribit Stormbox 2
- See all 138 comparisons
W-King D8 Mini: $49.99 W-King $49.99 eBay
Pros: 30W output with switchable indoor/outdoor EQ modes. IPX6 rated with a 5000mAh battery. Measured bass extension of 63Hz (-10dB).
Cons: Recessed midrange, harsh treble. Bass doesn’t go as deep as others.
Full W-King D8 Mini review and specifications →
| Released | Feb 2020 (6 years ago) |
|---|---|
| Amplifier Power | 30W |
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 63Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| 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 |
| EQ | Yes (2 modes - Indoor/Outdoor) |
| IP Rating | IPX6 |
| Maximum SPL | 100dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | No |
| Weight | 2.8 lbs (1260 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- W-King D8 Mini vs Soundcore Flare 2
- W-King D8 Mini vs Monster Shock S22
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