Short answer: the Harman Kardon Luna 2 on measured sound quality, the Ultimate Ears Megaboom 3 on price. The Harman Kardon Luna 2 ranks #22 of 138 medium speakers at $199.95. The Ultimate Ears Megaboom 3 ranks #85 at $163, $36.95 cheaper.
What the Harman Kardon Luna 2 offers: 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. Set against that: 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.
What the Ultimate Ears Megaboom 3 gets right: IP67 rated, floats, and survives drops from up to 1 meter. 20 hour battery life - about double most speakers this size. The tradeoff: Not stereo, barely any bass. You can tell from the micro USB that they are just feeding you the same crap hardware over and over, this is inexcusable for a product released in 2018. Not technically a 360 speaker, only front and rear.
Buy the Harman Kardon Luna 2 if sound quality matters more than the price. Buy the Ultimate Ears Megaboom 3 if the price matters more than sound quality.
If battery life is a priority, the Ultimate Ears Megaboom 3 is rated for 20 hours versus 12 hours for the Harman Kardon Luna 2.
Specifications Side By Side
| Harman Kardon Luna 2 | Ultimate Ears Megaboom 3 | |
|---|---|---|
| Price | $199.95 | $163 |
| Ranked | #22 of 138 in Medium Size Portable Bluetooth Speakers | #85 of 138 in Medium Size Portable Bluetooth Speakers |
| App | Yes | - |
| Aux Input | No | - |
| Battery Life | 12 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC | - |
| EQ | Yes (4 presets + custom) | - |
| IP Rating | IP67 | IPX7 |
| MicroSD Playback | No | - |
| Power Input | USB-C | Micro USB |
| Stereo | No | No |
| Omnidirectional | No | Yes |
| TWS | Yes | - |
| USB Playback | No | - |
| Weight | 1.6 lbs / 735 g | 2 lbs / 925 g |
| Bluetooth Version | 5.4 | 4.2 |
| Dimensions | 8.5" x 3.3" x 3.2" (216 x 84 x 81 mm) | 3.4" x 8.9" x 3.4" (87 x 225 x 87 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 2x 50mm fullrange |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | 60Hz - 20kHz (Manufacturer specified) |
| Output Power | 40W (25W woofer + 15W tweeter) | - |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | 70Hz |
| Max Volume | - | 98dB |
| Party Mode | - | Yes (PartyUp up to 50 speakers) |
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- JBL Charge 6 vs Ultimate Ears Megaboom 3
- Ultimate Ears Megaboom 3 vs Harman Kardon Esquire 2
Prices on this page were last checked September 1, 2026 at 2:15 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
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 →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 12 hours (Manufacturer specified) |
| 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 |
| Output Power | 40W (25W woofer + 15W tweeter) |
| Power Input | USB-C |
| Stereo | 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 JBL Charge 5
- Harman Kardon Luna 2 vs JBL Flip 7
- Harman Kardon Luna 2 vs JBL Flip 6
- Harman Kardon Luna 2 vs JBL Charge 6
- Harman Kardon Luna 2 vs Tribit Xsound Plus 2
- Harman Kardon Luna 2 vs Bose Soundlink Flex 2nd gen
- Harman Kardon Luna 2 vs Bose Soundlink Flex
- Harman Kardon Luna 2 vs Soundcore Motion 300
- See all 29 comparisons
Ultimate Ears Megaboom 3: $163 Amazon eBay
Pros: IP67 rated, floats, and survives drops from up to 1 meter. 20 hour battery life - about double most speakers this size.
Cons: Not stereo, barely any bass. You can tell from the micro USB that they are just feeding you the same crap hardware over and over, this is inexcusable for a product released in 2018. Not technically a 360 speaker, only front and rear.
Full Ultimate Ears Megaboom 3 review and specifications →
| Bass Extension (-10dB) | 70Hz |
|---|---|
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Version | 4.2 |
| Digital Aux Input | No |
| Dimensions | 3.4" x 8.9" x 3.4" (87 x 225 x 87 mm) |
| Drivers | 2x 50mm fullrange |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Max Volume | 98dB |
| Omnidirectional | Yes |
| Party Mode | Yes (PartyUp up to 50 speakers) |
| Power Input | Micro USB |
| Stereo | No |
| Weight | 2 lbs / 925 g |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Ultimate Ears Megaboom 3 vs LG Xboom Grab
- Ultimate Ears Megaboom 3 vs Ultimate Ears Wonderboom 4
- Ultimate Ears Megaboom 3 vs Ultimate Ears Wonderboom 3
- Ultimate Ears Megaboom 3 vs Soundcore 2
- Ultimate Ears Megaboom 3 vs Ultimate Ears Wonderboom 2
- Ultimate Ears Megaboom 3 vs Tribit Stormbox 2
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- Ultimate Ears Megaboom 3 vs Tribit Xsound Surf
- See all 75 comparisons