Short answer: the Harman Kardon Luna if sound quality matters most, the Xiaomi Sound Outdoor if price matters most. The Harman Kardon Luna ranks #26 of 177 medium speakers, rated 4.0/5, at $290.99. The Xiaomi Sound Outdoor ranks #46, rated 3.7/5, at $49.99, $241 cheaper.
The case for the Harman Kardon Luna: A fully waterproof speaker with fairly balanced, bass rich sound, a separate tweeter, and stereo pairing with a second unit. Watch for: Bass is limited by its 57Hz specification.
The Xiaomi Sound Outdoor is the lighter choice. An affordable waterproof outdoor speaker with a separate tweeter, decent battery life and linking to many more speakers. At 1.3 lbs (597 g) it weighs much less than the Harman Kardon Luna at 2.5 lbs (1.13 kg). The catch: Bass reach is limited for the cabinet size, with a rated lower limit of 60Hz, and the boosted bass gets somewhat uncontrolled at high levels.
Buy the Harman Kardon Luna if sound quality is the priority over the price, or the Xiaomi Sound Outdoor if the price is the priority over sound quality.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A fully waterproof speaker with fairly balanced, bass rich sound, a separate tweeter, and stereo pairing with a second unit.
An affordable waterproof outdoor speaker with a separate tweeter, decent battery life and linking to many more speakers.
Prices on this page were last checked October 31, 2026 at 7:11 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 | Xiaomi Sound Outdoor | |
|---|---|---|
| Price | $290.99 | $49.99 |
| Ranked | #26 of 177 in Medium Size Portable Bluetooth Speakers | #46 of 177 in Medium Size Portable Bluetooth Speakers |
| App | No | No |
| Aux Input | No | No |
| Bass Extension (-10dB) | 57Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| EQ | No | No |
| IP Rating | IP67 | IP67 |
| MicroSD Playback | No | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | - |
| Weight | 2.5 lbs (1.13 kg) | 1.3 lbs (597 g) |
| Bluetooth Version | 5.3 | 5.4 |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) | 7.7” x 2.7” x 2.6” (196.6 x 68 x 66 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter | 20W woofer, 10W tweeter + 2x passive radiators |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | 60Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 40W | 30W |
| Digital Aux Input | No | No |
| Built-in Microphone | - | Yes |
| Party Mode | - | Yes (Speakersync, up to 100 speakers) |
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