Short answer: the Ultimate Ears Boom 3 for battery and pairing, the Flare 2 for price, though neither ranks well in its class. The Boom 3 brings an excellent 15-hour battery, stable Bluetooth, an IP67 rating that floats, a rugged fabric shell and PartyUp pairing for 150 speakers, and the notes credit rich, warm bass with crisp highs. The catch: it is not stereo, with barely any bass and recessed treble. Flare 2 at $80 has a recommended Alan Ross EQ for its rolled off treble. Both are rated below 3.0/5 among the 164 medium speakers; for better sound, the Earfun Uboom L ranks #2 at $49.79.
Buy the Ultimate Ears Boom 3. It is rated higher for sound quality, and the Soundcore Flare 2 is discontinued, so it is only available used.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Soundcore Flare 2 | Ultimate Ears Boom 3 | |
|---|---|---|
| Price | $80 Discontinued | $134.99 |
| Ranked | #128 of 164 in Medium Size Portable Bluetooth Speakers | #111 of 164 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (Ultimate Ears BOOM & MEGABOOM app) |
| Bass Extension (-10dB) | 56Hz | 91Hz |
| Battery Life | 12 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| EQ | Yes | Yes (via app) |
| Bluetooth Latency | 80ms | - |
| Maximum SPL | 99dB (measured by Alan Ross Reviews) | 87dB (Manufacturer specified) |
| Party Mode | Yes (PartyCast up to 100 speakers) | Yes (PartyUp up to 50 speakers) |
| Weight | 1.3 lbs (600 g) | 1.3 lbs (608 g) |
| IP Rating | IPX7 | IP67 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.0 | 4.2 |
| Bluetooth Codecs | SBC | SBC |
| Drivers | 2x full-range drivers + 2x passive radiators | 2x 2” active drivers + 2x 2” x 4” passive radiators |
| TWS | Yes | Yes |
| Built-in Microphone | Yes | No |
| Stereo | Yes | Yes |
| Omnidirectional | Pointing up | Yes |
| Power Input | USB-C | Micro USB |
| Amplifier Power | 20W | - |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| Dimensions | 3.5” x 3.5” x 6.3” (89 x 89 x 160 mm) | 7.2” x 2.9” (184 x 73 mm) |
| Aux Input | No | No |
| Strap | - | Yes (built-in loop) |
Related Speaker Comparisons
How Ultimate Ears Boom 3 compares with other leading options:
- Earfun Uboom L vs Ultimate Ears Boom 3
- Soundcore Motion 300 vs Ultimate Ears Boom 3
- Soundcore Motion+ vs Ultimate Ears Boom 3
- Soundcore Boost “upgraded” 2021 vs Ultimate Ears Boom 3
- Minirig 4 vs Ultimate Ears Boom 3
Prices on this page were last checked October 4, 2026 at 9:58 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
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 →
| 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
- Head-to-Head Comparisons
- Soundcore Flare 2 vs Sony SRS-XB30
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Ultimate Ears Boom 3: $134.99 Amazon eBay
Newer model: the Ultimate Ears Boom 4, ranked higher, rated 2.9/5.
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 →
| 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
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
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