Short answer: the EarFun Uboom L. It ranks #2 of 177 medium speakers by sound quality, rated 4.6/5, at $49.79; the Ultimate Ears Boom 3 ranks #113, rated 2.9/5, and costs $132.99, so there is not much of a tradeoff to weigh.
The EarFun Uboom L is the better-sounding, deeper-bass choice. A great value medium speaker with clear, natural sound, waterproofing, and a Video Mode that keeps audio in sync with video. Its bass reaches about 56Hz before falling 10dB, against 91Hz for the Ultimate Ears Boom 3. It supports AAC Bluetooth, which the Ultimate Ears Boom 3 lacks. It keeps a wired aux input, which the Ultimate Ears Boom 3 lacks. The catch: It cannot produce real low-bass rumble or fill a large, noisy space, and the top end loses some detail.
What the Ultimate Ears Boom 3 does well: A rugged waterproof speaker that floats, with a fabric shell, a stable Bluetooth connection and PartyUp linking for many speakers. It links with other speakers (PartyUp up to 50 speakers), which the EarFun Uboom L cannot. The tradeoff: Not stereo, barely any bass, recessed treble.
Buy the EarFun Uboom L. It is rated higher for sound quality than the Ultimate Ears Boom 3 and costs less, which makes it the one to get unless you need something the other one does better.
Want more options? Browse the full Portable Bluetooth rankings.
A great value medium speaker with clear, natural sound, waterproofing, and a Video Mode that keeps audio in sync with video.
A rugged waterproof speaker that floats, with a fabric shell, a stable Bluetooth connection and PartyUp linking for many speakers.
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Specifications Side By Side
| EarFun Uboom L | Ultimate Ears Boom 3 | |
|---|---|---|
| Price | $49.79 after coupon UBOOMLWC | $132.99 |
| Ranked | #2 of 177 in Medium Size Portable Bluetooth Speakers | #113 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes (firmware >= 1.2.6) | Yes (Ultimate Ears BOOM & MEGABOOM app) |
| Aux Input | Yes | No |
| Aux Latency | 216ms | - |
| Bass Extension (-10dB) | 56Hz | 91Hz |
| Battery Life | 16 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC |
| Built-in Microphone | Yes | No |
| EQ | Yes (10 band, firmware >= 1.2.6) | Yes (via app) |
| IP Rating | IP67 | IP67 |
| Bluetooth Latency | 400ms normal / 66ms low latency mode | - |
| Maximum SPL | 103dB (measured by Alan Ross Reviews) | 87dB (Manufacturer specified) |
| Party Mode | No | Yes (PartyUp up to 50 speakers) |
| Power Bank | No | - |
| Power Input | USB-C | Micro USB |
| Stereo | Yes | Yes |
| Omnidirectional | No | Yes |
| TWS | Yes | Yes |
| Weight | 1.4 lbs (650 g) | 1.3 lbs (608 g) |
| Bluetooth Version | 5.0 | 4.2 |
| Dimensions | 3.1” x 8.3” x 2.8” (78 x 210 x 72 mm) | 7.2” x 2.9” (184 x 73 mm) |
| Drivers | 2x 55mm drivers + 2x passive radiators | 2x 2” active drivers + 2x 2” x 4” passive radiators |
| Amplifier Power | 28W | - |
| Digital Aux Input | No | No |
| Strap | - | Yes (built-in loop) |
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