Short answer: the EarFun Uboom L. It ranks #2 of 177 medium speakers by sound quality, rated 4.6/5, at $49.79; the KEF Muo gen2 ranks #96, rated 3.1/5, and costs $249.99, so there is little reason to consider the other one.
The EarFun Uboom L is the better-sounding choice. A great value medium speaker with clear, natural sound, waterproofing, and a Video Mode that keeps audio in sync with video. It keeps a wired aux input, which the KEF Muo gen2 lacks. The tradeoff: It cannot produce real low-bass rumble or fill a large, noisy space, and the top end loses some detail.
The KEF Muo gen2 is the longer-running choice. A stylish waterproof stereo speaker with aptX Adaptive, USB-C audio input, Auracast and long battery life. It is rated for 24 hours of battery against 16 for the EarFun Uboom L. It supports aptX Adaptive Bluetooth, which the EarFun Uboom L lacks. It links with other speakers (Auracast), which the EarFun Uboom L cannot. Watch for: Lacking deeper bass.
Buy the EarFun Uboom L. It is rated higher for sound quality than the KEF Muo gen2 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 stylish waterproof stereo speaker with aptX Adaptive, USB-C audio input, Auracast and long battery life.
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Specifications Side By Side
| EarFun Uboom L | KEF Muo gen2 | |
|---|---|---|
| Price | $49.79 after coupon UBOOMLWC | $249.99 |
| Ranked | #2 of 177 in Medium Size Portable Bluetooth Speakers | #96 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes (firmware >= 1.2.6) | Yes |
| Aux Input | Yes | No |
| Aux Latency | 216ms | - |
| Bass Extension (-10dB) | 56Hz | - |
| Battery Life | 16 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC, aptX Adaptive up to 48 kHz 24 bit |
| Built-in Microphone | Yes | - |
| EQ | Yes (10 band, firmware >= 1.2.6) | Yes |
| IP Rating | IP67 | IP67 |
| Bluetooth Latency | 400ms normal / 66ms low latency mode | - |
| Maximum SPL | 103dB (measured by Alan Ross Reviews) | 90dB (Manufacturer specified) |
| Party Mode | No | Yes (Auracast) |
| Power Bank | No | - |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 1.4 lbs (650 g) | 1.6 lbs (740 g) |
| Bluetooth Version | 5.0 | 5.4 |
| Dimensions | 3.1” x 8.3” x 2.8” (78 x 210 x 72 mm) | 8.5” x 3.2” x 2.3” (216 x 82 x 59 mm) |
| Drivers | 2x 55mm drivers + 2x passive radiators | 1x 58x117mm racetrack woofer, 1x 20mm tweeter |
| Amplifier Power | 28W | 40W |
| Digital Aux Input | No | Yes (USB-C) |
| Frequency Response | - | 43Hz - 20kHz (Manufacturer specified) |
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