Short answer: the Soundcore 2. It ranks #106 of 175 medium speakers by sound quality, rated 3.0/5, at $29.99; the Ultimate Ears Boom 4 ranks #113, rated 2.9/5, and costs $129.99, so there is little reason to consider the other one.
The Soundcore 2 is the longer-running, lighter choice. It is rated for 24 hours of battery against 15 for the Ultimate Ears Boom 4. At 0.7 lbs (318 g) it weighs much less than the Ultimate Ears Boom 4 at 1.4 lbs (620 g). It keeps a wired aux input, which the Ultimate Ears Boom 4 lacks.
The case for the Ultimate Ears Boom 4: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. It has an adjustable EQ, which the Soundcore 2 lacks. It charges over USB-C rather than Micro USB. The tradeoff: Not much improvement over the old ones.
Buy the Soundcore 2. It is rated higher for sound quality than the Ultimate Ears Boom 4 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Soundcore 2 | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $29.99 | $129.99 |
| Ranked | #106 of 175 in Medium Size Portable Bluetooth Speakers | #113 of 175 in Medium Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Battery Life | 24 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Weight | 0.7 lbs (318 g) | 1.4 lbs (620 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.0 | 5.1 |
| Drivers | 2x 38mm fullrange | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| Dimensions | 6.6” x 1.9” x 2.2” (168 x 47 x 56 mm) | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Frequency Response | 70Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 12W | - |
| App | No | Yes |
| Built-in Microphone | No | No |
| EQ | No | Yes (via app) |
| Bluetooth Codecs | SBC | SBC |
| IP Rating | IPX7 | IP67 |
| Digital Aux Input | No | No |
| Power Input | Micro USB | USB-C |
| TWS | Yes | Yes |
| Strap | No | Yes (built-in loop) |
| Power Bank | - | No |
| Maximum SPL | - | 85dBC (Manufacturer specified) |
Related Speaker Comparisons
How Soundcore 2 compares with other leading options:
- Soundcore 2 vs EarFun Uboom L
- Soundcore Motion 300 vs Soundcore 2
- Soundcore Motion+ vs Soundcore 2
- Soundcore Boost “upgraded” 2021 vs Soundcore 2
- Soundcore 2 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
Soundcore 2: $29.99 Amazon $29.99 eBay
Newer model: the Soundcore 3, ranked higher, rated 3.4/5, released Jan 2021. It adds app control and adjustable EQ, but drops the aux input. See every Soundcore 2 and 3 generation.
Pros: Soundcore 2 uses 2x 38mm fullrange. Its 318 g, claimed 24 hours (Manufacturer specified) battery life, IPX7 protection, aux input and stereo playback make it a practical option for its intended room or portable use.
Cons: Its 70Hz to 20kHz (Manufacturer specified) specification points to limited deep-bass reach for the cabinet size. There is no companion app. No EQ adjustment.
Full Soundcore 2 review and specifications →
| Released | May 2017 (9 years ago) |
|---|---|
| Amplifier Power | 12W |
| App | No |
| Aux Input | Yes |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 6.6” x 1.9” x 2.2” (168 x 47 x 56 mm) |
| Drivers | 2x 38mm fullrange |
| EQ | No |
| Frequency Response | 70Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Power Input | Micro USB |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 0.7 lbs (318 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Soundcore 2 vs Tribit Stormbox 2
- Soundcore 2 vs LG Xboom Grab
- Soundcore 2 vs Tribit Xsound Surf
- Soundcore 2 vs Ultimate Ears Megaboom 3
- Soundcore 2 vs Ultimate Ears Wonderboom 4
- Soundcore 2 vs Tronsmart Mirtune C3
- Soundcore 2 vs Tribit Xsound Go
- Soundcore 2 vs Ultimate Ears Wonderboom 3
- See all 140 comparisons
Ultimate Ears Boom 4: $129.99 Amazon $129.99 eBay
Older model: the Ultimate Ears Boom 3 (ranked lower, rated 2.9/5). See every Ultimate Ears Wonderboom, Boom and Megaboom generation.
Same family: the Ultimate Ears Wonderboom 4 (smaller model, ranked higher, rated 2.9/5) and the Ultimate Ears Megaboom 4 (larger model, ranked lower, rated 2.1/5).
Pros: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app.
Cons: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%
Full Ultimate Ears Boom 4 review and specifications →
| Released | Jun 2024 (2 years ago) |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 85dBC (Manufacturer specified) |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 1.4 lbs (620 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Ultimate Ears Boom 4 vs Ultimate Ears Boom 3
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom
- Ultimate Ears Boom 4 vs Klipsch Groove
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 2
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 3
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 4
- Ultimate Ears Boom 4 vs DBSONO X-Blast F37
- Ultimate Ears Boom 4 vs Sony SRS-XE300
- See all 139 comparisons