Short answer: the Harman Kardon Luna 2, and it ranks far higher. It places #25 of 172 against #123 of 172 for the Marshall Emberton III. The Emberton III has a 30 hour battery with a 20 minute quick charge for 4 hours and an IP67 rubbery build using 50% recycled plastic, but it has a strange unnatural echo-like coloration, shallower bass and only front and rear drivers.
Buy the Harman Kardon Luna 2. It is rated higher for sound quality, and the $19.96 saving on the Marshall Emberton III is not enough to make up the difference.
Battery life favors the Marshall Emberton III: rated for 32 hours against 12 hours for the Harman Kardon Luna 2.
Want more options? Browse the full Portable Bluetooth rankings.
Articulate, spacious midrange with precise imaging and instrument separation.
Amazon $199.95 B&H Photo Video $199.95 eBay
30 hour battery life: among the best in its class; a 20 min quick-charge gives 4 hours.
Amazon $179.99 Marshall $179.99 eBayPrices on this page were last checked October 16, 2026 at 5:46 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 | Marshall Emberton III | |
|---|---|---|
| Price | $199.95 | $179.99 |
| Ranked | #25 of 172 in Medium Size Portable Bluetooth Speakers | #123 of 172 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Battery Life | 12 hours (Manufacturer specified) | 32 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| EQ | Yes (4 presets + custom) | Yes (3 presets via app) |
| IP Rating | IP67 | IP67 |
| MicroSD Playback | No | - |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | No | Yes |
| TWS | Yes | No |
| USB Playback | No | - |
| Weight | 1.6 lbs (735 g) | 1.5 lbs (673 g) |
| Bluetooth Version | 5.4 | 5.3 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 6.3” x 2.7” x 3” (160 x 68 x 76 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 2x 2” full-range cone drivers + 2x 2” passive radiators |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | - |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 20W |
| Digital Aux Input | No | No |
| Strap | No | No |
| Bass Extension (-10dB) | - | 62Hz |
| Party Mode | - | Yes (Marshall Stack) |
| Built-in Microphone | - | Yes |
| Power Bank | - | No |
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