Short answer: the Harman Kardon Luna is the warmer, more balanced everyday speaker, while the KEF Muo gen2 is the compact alternative for listeners who value its improved treble balance. Luna’s boosted bass gives it more body but it is not a stereo design. KEF has cleaned up the Muo’s treble and overall balance, yet it still lacks the deeper bass that makes small speakers feel substantial.
Buy the Harman Kardon Luna if you prefer fuller bass and an overall balanced portable sound.
Buy the KEF Muo gen2 if a compact design and improved treble balance matter more than deep bass.
If battery life is a priority, the KEF Muo gen2 is rated for 24 hours versus 12 hours for the Harman Kardon Luna.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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Specifications Side By Side
| Harman Kardon Luna | KEF Muo gen2 | |
|---|---|---|
| Price | $290.99 | $249.99 |
| Ranked | #26 of 179 in Medium Size Portable Bluetooth Speakers | #96 of 179 in Medium Size Portable Bluetooth Speakers |
| App | No | Yes |
| Aux Input | No | No |
| Bass Extension (-10dB) | 57Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, aptX Adaptive up to 48 kHz 24 bit |
| EQ | No | Yes |
| 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) | 1.6 lbs (740 g) |
| Bluetooth Version | 5.3 | 5.4 |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) | 8.5” x 3.2” x 2.3” (216 x 82 x 59 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter | 1x 58x117mm racetrack woofer, 1x 20mm tweeter |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | 43Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 40W | 40W |
| Digital Aux Input | No | Yes (USB-C) |
| Party Mode | - | Yes (Auracast) |
| Maximum SPL | - | 90dB (Manufacturer specified) |
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