Short answer: the Harman Kardon Luna. It ranks #26 of 177 medium speakers by sound quality, rated 4.0/5, at $290.99. The Sonos Roam 2 ranks #94, rated 3.2/5, at $179, $111.99 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Luna is the more balanced Bluetooth speaker. A 48 x 90mm woofer and separate tweeter on 40W give fairly balanced sound apart from boosted bass, reaching about 57Hz before falling 10dB, and it is rated IP67. It has no app or EQ.
The Roam 2 is a small speaker that also joins a Sonos system. It is very neutral, weighs 0.9 lbs (429 g), and works over Wi-Fi with AirPlay 2 and Sonos multi-room or over Bluetooth with AAC. Its bass is shallow, falling 10dB around 63Hz, it distorts if you raise the bass, and its battery is rated for 10 hours.
Buy the Harman Kardon Luna. It is rated higher for sound quality, and the $111.99 saving on the Sonos Roam 2 is not enough to make up the difference.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A fully waterproof speaker with fairly balanced, bass rich sound, a separate tweeter, and stereo pairing with a second unit.
A small Wi-Fi and Bluetooth speaker with water resistance, Alexa built in and Sonos multiroom support.
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 | Sonos Roam 2 | |
|---|---|---|
| Price | $290.99 | $179.00 |
| Ranked | #26 of 177 in Medium Size Portable Bluetooth Speakers | #94 of 177 in Medium Size Portable Bluetooth Speakers |
| App | No | Sonos S2 App |
| Aux Input | No | No |
| Bass Extension (-10dB) | 57Hz | 63Hz |
| Battery Life | 12 hours (Manufacturer specified) | 10 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC |
| EQ | No | Yes (via app, limited in Bluetooth mode) |
| IP Rating | IP67 | IPX5 |
| 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) | 0.9 lbs (429 g) |
| Bluetooth Version | 5.3 | 5.2 |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) | 2.4” x 6.6” x 2.4” (62 x 168 x 60 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter | 1x ~45mm racetrack mid-woofer + 1x tweeter + 2x passive radiators |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 40W | - |
| Digital Aux Input | No | No |
| Wi-Fi | - | Yes |
| Built-in Microphone | - | Yes |
| Voice Assistants | - | Amazon Alexa (Sonos Voice Control also built in) |
| Maximum SPL | - | 95dB (Manufacturer specified) |
| Strap | - | No |
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