Short answer: the EarFun Uboom L. It ranks #2 of 177 medium speakers by sound quality, rated 4.6/5, at $49.79; the Harman Kardon Luna ranks #26, rated 4.0/5, and costs $290.99, so there is little reason to consider the other one.
The case for the Harman Kardon Luna: A fully waterproof speaker with fairly balanced, bass rich sound, a separate tweeter, and stereo pairing with a second unit. The tradeoff: Bass is limited by its 57Hz specification.
The EarFun Uboom L is the better-sounding, longer-running choice. A great value medium speaker with clear, natural sound, waterproofing, and a Video Mode that keeps audio in sync with video. It is rated for 16 hours of battery against 12 for the Harman Kardon Luna. At 1.4 lbs (650 g) it weighs much less than the Harman Kardon Luna at 2.5 lbs (1.13 kg). It supports AAC Bluetooth, which the Harman Kardon Luna lacks. The tradeoff: It cannot produce real low-bass rumble or fill a large, noisy space, and the top end loses some detail.
Buy the EarFun Uboom L. It is rated higher for sound quality than the Harman Kardon Luna and costs less, so only choose the other one for a particular feature it does better.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A fully waterproof speaker with fairly balanced, bass rich sound, a separate tweeter, and stereo pairing with a second unit.
A great value medium speaker with clear, natural sound, waterproofing, and a Video Mode that keeps audio in sync with video.
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Specifications Side By Side
| Harman Kardon Luna | EarFun Uboom L | |
|---|---|---|
| Price | $290.99 | $49.79 after coupon UBOOMLWC |
| Ranked | #26 of 177 in Medium Size Portable Bluetooth Speakers | #2 of 177 in Medium Size Portable Bluetooth Speakers |
| App | No | Yes (firmware >= 1.2.6) |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | 57Hz | 56Hz |
| Battery Life | 12 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | AAC, SBC |
| EQ | No | Yes (10 band, firmware >= 1.2.6) |
| IP Rating | IP67 | IP67 |
| MicroSD Playback | No | - |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | - |
| Weight | 2.5 lbs (1.13 kg) | 1.4 lbs (650 g) |
| Bluetooth Version | 5.3 | 5.0 |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) | 3.1” x 8.3” x 2.8” (78 x 210 x 72 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter | 2x 55mm drivers + 2x passive radiators |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 40W | 28W |
| Digital Aux Input | No | No |
| Aux Latency | - | 216ms |
| Built-in Microphone | - | Yes |
| Bluetooth Latency | - | 400ms normal / 66ms low latency mode |
| Maximum SPL | - | 103dB (measured by Alan Ross Reviews) |
| Party Mode | - | No |
| Power Bank | - | No |
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