Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The Soundcore Boom 2 ranks #10 of 120 large speakers by sound quality at $99.99; the Ultimate Ears Boom 4 ranks #113 of 179 medium speakers by sound quality at $114.99.
The Soundcore Boom 2 is the longer-running pick. A light, waterproof large speaker with deep bass for its size, a 24 hour battery and fun lighting. It is rated for 24 hours of battery against 15 for the Ultimate Ears Boom 4. Watch for: Only a single midrange driver, so you only get stereo for the tweeters.
The Ultimate Ears Boom 4 is the lighter option. A tough waterproof speaker that floats, with USB-C charging, app EQ and pairing with other UE speakers. At 1.4 lbs (620 g) it weighs much less than the Soundcore Boom 2 at 3.7 lbs (1.68 kg). The catch: Not much improvement over the old ones.
Buy the Soundcore Boom 2 at $99.99 if you want a large speaker. Buy the Ultimate Ears Boom 4 at $114.99 if you want a medium speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| Soundcore Boom 2 | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $99.99 | $114.99 |
| Ranked | #10 of 120 in Large Size Portable Bluetooth Speakers | #113 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Bass Extension (-10dB) | 47Hz | - |
| Battery Life | 24 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | No | No |
| EQ | Yes | Yes (via app) |
| IP Rating | IPX7 | IP67 |
| Bluetooth Latency | 125ms | - |
| Maximum SPL | 105dB (measured by Alan Ross Reviews) | 85dBC (Manufacturer specified) |
| MicroSD Playback | No | - |
| Party Mode | Yes (PartyCast 2.0 up to 100 speakers) | - |
| Power Bank | Yes (USB-A) | No |
| Power Input | USB-C | USB-C |
| Stereo | Partially (1 woofer) | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 3.7 lbs (1.68 kg) | 1.4 lbs (620 g) |
| Bluetooth Version | 5.3 | 5.1 |
| Dimensions | 11.7” x 7.3” x 4” (297 x 185 x 102 mm) | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Drivers | 120mm x 90mm woofer, 2x 20mm tweeters | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| Frequency Response | 45Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 80W | - |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| Strap | No | Yes (built-in loop) |
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