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 and is still sold new; the Soundcore Flare 2 ranks #134 (rated 2.6/5) and is discontinued, so it is only an option used. Both are rated below 3.0/5 among the 175 medium speakers; for better sound, the EarFun Uboom L ranks #2 at $49.79.
The Ultimate Ears Wonderboom 4 is the lighter choice. At 0.9 lbs (420 g) it weighs noticeably less than the Soundcore Flare 2 at 1.3 lbs (600 g). Watch for: Bass isn’t as deep as the top-ranked speakers and is a little thuddy.
What the Soundcore Flare 2 does well: Try Alan Ross’s EQ for it. It links with other speakers (PartyCast up to 100 speakers), which the Ultimate Ears Wonderboom 4 cannot. It has an adjustable EQ, which the Ultimate Ears Wonderboom 4 lacks. It plays in stereo from a single unit, unlike the Ultimate Ears Wonderboom 4. The catch: Rolled off treble.
Buy the Ultimate Ears Wonderboom 4. It is rated higher for sound quality; the Soundcore Flare 2 is no longer sold new.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Ultimate Ears Wonderboom 4 | Soundcore Flare 2 | |
|---|---|---|
| Price | $74.50 | $80 Discontinued |
| Ranked | #109 of 175 in Medium Size Portable Bluetooth Speakers | #134 of 175 in Medium Size Portable Bluetooth Speakers |
| Battery Life | 14 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Maximum SPL | 87dB (Manufacturer specified) | 99dB (measured by Alan Ross Reviews) |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Yes | Pointing up |
| Weight | 0.9 lbs (420 g) | 1.3 lbs (600 g) |
| IP Rating | IP67 | IPX7 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.2 | 5.0 |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) | 3.5” x 3.5” x 6.3” (89 x 89 x 160 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) | 2x full-range drivers + 2x passive radiators |
| TWS | Yes | Yes |
| Party Mode | No | Yes (PartyCast up to 100 speakers) |
| App | No | Yes |
| EQ | No | Yes |
| Built-in Microphone | No | Yes |
| Power Bank | No | - |
| Aux Input | No | No |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC |
| Strap | Yes (built-in loop) | - |
| Bass Extension (-10dB) | - | 56Hz |
| Bluetooth Latency | - | 80ms |
| Amplifier Power | - | 20W |
| Lights | - | Yes |
Related Speaker Comparisons
More worthwhile head-to-heads for Ultimate Ears Wonderboom 4:
- Ultimate Ears Wonderboom 4 vs EarFun Uboom L
- Ultimate Ears Wonderboom 4 vs Soundcore Motion 300
- Ultimate Ears Wonderboom 4 vs Soundcore Motion+
- Soundcore Boost “upgraded” 2021 vs Ultimate Ears Wonderboom 4
- Ultimate Ears Wonderboom 4 vs Minirig 4
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
Soundcore Flare 2: $80 Discontinued eBay
Pros: Try Alan Ross’s EQ for it. Measured bass extension of 56Hz (-10dB).
Cons: Rolled off treble. Thuddy bass. Not technically a 360 speaker, only front and rear. Discontinued and no longer sold new.
Full Soundcore Flare 2 review and specifications →
| Released | Jan 2020 (6 years ago) |
|---|---|
| Amplifier Power | 20W |
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 56Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 80ms |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 3.5” x 3.5” x 6.3” (89 x 89 x 160 mm) |
| Drivers | 2x full-range drivers + 2x passive radiators |
| EQ | Yes |
| IP Rating | IPX7 |
| Lights | Yes |
| Maximum SPL | 99dB (measured by Alan Ross Reviews) |
| Omnidirectional | Pointing up |
| Party Mode | Yes (PartyCast up to 100 speakers) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.3 lbs (600 g) |
- Links
- Reviews, Comparisons and Sound Samples
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