Short answer: the Harman Kardon Luna 2. It ranks #25 of 164 medium speakers by sound quality (rated 4.1/5) at $199.95 and is still sold new; the Xiaomi Mi Portable ranks #75 (rated 3.4/5) and is discontinued, so it is only an option used.
The Harman Kardon Luna 2 is the better-sounding pick. Articulate, spacious midrange with precise imaging and instrument separation. The tradeoff: Treble can sound bright and edgy, and it loses more output off-axis than some rivals.
The Xiaomi Mi Portable is the lighter choice. Good battery life for a 16W speaker: around 12 hours at moderate volume. At 0.8 lbs (373 g) it weighs much less than the Harman Kardon Luna 2 at 1.6 lbs (735 g). It keeps a wired aux input, which the Harman Kardon Luna 2 lacks. It plays in stereo from a single unit, unlike the Harman Kardon Luna 2. The catch: A bit of a sharp treble.
Buy the Harman Kardon Luna 2. It is rated higher for sound quality and still sold new, while the Xiaomi Mi Portable is discontinued.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Luna 2 | Xiaomi Mi Portable | |
|---|---|---|
| Price | $199.95 | $55 Discontinued |
| Ranked | #25 of 164 in Medium Size Portable Bluetooth Speakers | #75 of 164 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes (3.5mm) |
| Battery Life | 12 hours (Manufacturer specified) | 13 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| EQ | Yes (4 presets + custom) | Yes |
| IP Rating | IP67 | IPX7 |
| MicroSD Playback | No | - |
| Power Input | USB-C | USB-C (5V/1A) |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | No | - |
| Weight | 1.6 lbs (735 g) | 0.8 lbs (373 g) |
| Bluetooth Version | 5.4 | 5.0 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 8.4” x 2.9” x 2.9” (213 x 74 x 74 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 2x 57mm full-range drivers + 2x passive radiators |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | 80Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 16W |
| Digital Aux Input | No | No |
| Strap | No | - |
| Built-in Microphone | - | Yes |
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Prices on this page were last checked October 4, 2026 at 9:58 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 2: $199.95 Amazon B&H Photo Video eBay
Older model: the Harman Kardon Luna (ranked lower, rated 4/5).
Pros: Articulate, spacious midrange with precise imaging and instrument separation. Tight, well-controlled bass from the 62mm x 82mm woofer and passive radiator despite the compact body, and it stays cleaner at volume than pricier rivals like the Sonos Play. IP67 rated, and two units pair via AirTouch for true stereo sound.
Cons: Treble can sound bright and edgy, and it loses more output off-axis than some rivals. Some listeners hear mid-range rattling on certain tracks, similar to sibling JBL models. 12-hour battery life trails category leaders like the JBL Charge 6, which doubles it. Single unit is not stereo (1.1 driver layout).
Full Harman Kardon Luna 2 review and specifications →
| Amplifier Power | 40W (25W woofer + 15W tweeter) |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.4 |
| Digital Aux Input | No |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter |
| EQ | Yes (4 presets + custom) |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) |
| IP Rating | IP67 |
| MicroSD Playback | No |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 1.6 lbs (735 g) |
- Links
- Reviews, Comparisons and Sound Samples
- What Hi-Fi?: Harman Kardon Luna 2 review
- Joy & Oluv’Sone: Sonos Play & Harman Kardon Luna 2 - listening test More from Oluv’Sone →
- Mateusz Cholewa: Harman Kardon Luna 2 UNBOXING vs HK Luna Short Test More from Mateusz Cholewa →
- Storytripper HD: Harman Kardon Luna vs Luna 2 More from storytripperhd →
- Head-to-Head Comparisons
- Harman Kardon Luna 2 vs Harman Kardon Luna
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- Harman Kardon Luna 2 vs Bogasing M4
- Harman Kardon Luna 2 vs JBL Charge 5 Wifi
- Harman Kardon Luna 2 vs JBL Charge 5
- Harman Kardon Luna 2 vs Xiaomi Sound Party
- Harman Kardon Luna 2 vs Soundcore Boom 3i
- Harman Kardon Luna 2 vs B&O Beosound A1 3rd gen
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Xiaomi Mi Portable: $55 Discontinued Amazon eBay
Pros: Good battery life for a 16W speaker: around 12 hours at moderate volume. USB-C charging, stereo pairing support.
Cons: A bit of a sharp treble. Discontinued.
Full Xiaomi Mi Portable review and specifications →
| Amplifier Power | 16W |
|---|---|
| App | No |
| Aux Input | Yes (3.5mm) |
| Battery Life | 13 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 8.4” x 2.9” x 2.9” (213 x 74 x 74 mm) |
| Drivers | 2x 57mm full-range drivers + 2x passive radiators |
| EQ | Yes |
| Frequency Response | 80Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Power Input | USB-C (5V/1A) |
| Stereo | Yes |
| TWS | Yes |
| Weight | 0.8 lbs (373 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Xiaomi Mi Portable vs Sony ULT Field 3
- Xiaomi Mi Portable vs Sony XB33
- Xiaomi Mi Portable vs Bose Soundlink Mini
- Xiaomi Mi Portable vs Bose Soundlink Mini 2
- Xiaomi Mi Portable vs JBL Flip 5
- Xiaomi Mi Portable vs JBL Flip Essential 2
- Xiaomi Mi Portable vs Soundcore 3
- Xiaomi Mi Portable vs JBL Flip 4
- See all 39 comparisons