Short answer: the Harman Kardon Luna 2 for sound quality, the Ultimate Ears Megaboom 3 for battery and toughness. The Megaboom 3 survives drops from up to 1 meter, floats, is IP67 rated and runs 20 hours, but it is not stereo, has barely any bass and still uses micro USB from a 2018 design. The Luna 2 is the more balanced and articulate of the two at $199.95 versus $191.99.
Buy the Harman Kardon Luna 2. It is rated higher for sound quality, and saving $7.96 with the Ultimate Ears Megaboom 3 does not make up for the sound-quality gap.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Articulate, spacious midrange with precise imaging and instrument separation.
Amazon $199.95 B&H Photo Video $199.95 eBay
IP67 rated, floats, and survives drops from up to 1 meter.
Amazon $191.99 eBayPrices on this page were last checked October 15, 2026 at 5:41 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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Specifications Side By Side
| Harman Kardon Luna 2 | Ultimate Ears Megaboom 3 | |
|---|---|---|
| Price | $199.95 | $191.99 |
| Ranked | #25 of 172 in Medium Size Portable Bluetooth Speakers | #105 of 172 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (UE | BOOM app) |
| Aux Input | No | No |
| Battery Life | 12 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| EQ | Yes (4 presets + custom) | Yes (App EQ) |
| IP Rating | IP67 | IPX7 |
| MicroSD Playback | No | - |
| Power Input | USB-C | Micro USB |
| Stereo | No | No |
| Omnidirectional | No | Yes |
| TWS | Yes | 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) |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | - |
| Digital Aux Input | No | No |
| Strap | No | Yes (built-in loop) |
| Bass Extension (-10dB) | - | 70Hz |
| Maximum SPL | - | 98dB (measured by Alan Ross Reviews) |
| Party Mode | - | Yes (PartyUp up to 50 speakers) |
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