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.
The case for the Harman Kardon Luna: Pretty balanced sound besides the boosted bass. The catch: Not stereo.
What the KEF Muo gen2 gets right: KEF seemed to have fixed the rolled off treble and overall balance. The catch: Lacking deeper bass.
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.
Specifications Side By Side
| Harman Kardon Luna | KEF Muo gen2 | |
|---|---|---|
| Price | $290.99 | $249.99 |
| Ranked | #24 of 142 in Medium Size Portable Bluetooth Speakers | #76 of 142 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 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) |
Related Speaker Comparisons
How Harman Kardon Luna compares with other leading options:
- Harman Kardon Luna vs Earfun Uboom L
- Soundcore Motion 300 vs Harman Kardon Luna
- Soundcore Motion+ vs Harman Kardon Luna
- Soundcore Boost “upgraded” 2021 vs Harman Kardon Luna
- Harman Kardon Luna vs Minirig 4
Prices on this page were last checked September 23, 2026 at 11:24 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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The Two Speakers In Full
Harman Kardon Luna: $290.99 Amazon eBay
Pros: Harman Kardon Luna uses 48mm x 90mm woofer, 20mm tweeter. Its 1.13 kg, claimed 12 hours (Manufacturer specified) battery life, IP67 protection and mono playback make it a practical option for its intended room or portable use. Measured bass extension of 57Hz (-10dB).
Cons: Bass is limited by its 57Hz specification. There is no companion app. No EQ adjustment.
Full Harman Kardon Luna review and specifications →
| Amplifier Power | 40W |
|---|---|
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | 57Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 8.3" x 3.1" x 3.1" (210 x 78 x 80 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter |
| EQ | No |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| MicroSD Playback | No |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 2.5 lbs (1.13 kg) |
- Links
- Reviews, Comparisons and Sound Samples
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- See all 88 comparisons
KEF Muo gen2: $249.99 Amazon eBay
Pros: KEF seemed to have fixed the rolled off treble and overall balance
Cons: Lacking deeper bass. Very thuddy bass. Appears to be the exact same hardware but with updated tuning. Bass distorts as volume increases, and the claimed 43Hz extension is really only audible at low listening volumes, with a few seconds of lag after volume changes. Loses most of its bass off-axis. Customer reviews are mixed, ranging from praise for detail at low volume to complaints of a boxy, hollow sound.
Full KEF Muo gen2 review and specifications →
| Amplifier Power | 40W |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, aptX Adaptive up to 48 kHz 24 bit |
| Bluetooth Version | 5.4 |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 8.5" x 3.2" x 2.3" (216 x 82 x 59 mm) |
| Drivers | 1x 58x117mm racetrack woofer, 1x 20mm tweeter |
| EQ | Yes |
| Frequency Response | 43Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Maximum SPL | 90dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.6 lbs (740 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons