Short answer: the Harman Kardon Luna 2. It ranks #25 of 177 medium speakers by sound quality (rated 4.1/5) at $199.95 and is still sold new; the Sonos Roam ranks #95 (rated 3.1/5) and is discontinued, so it is only an option used. The Sonos Roam’s replacement, the Sonos Roam 2, is rated 3.2/5 at $179.
The Harman Kardon Luna 2 is the better-sounding, tougher option. A stylish waterproof speaker with clear, spacious mids, tight bass that stays clean at volume, and stereo pairing with a second unit. It is rated IP67 against IPX5 for the Sonos Roam. The tradeoff: Treble can sound bright and edgy, and it loses more output off-axis than some rivals.
The Sonos Roam is the lighter pick. A small, waterproof Wi-Fi and Bluetooth speaker with wireless charging, voice control and Sonos multiroom support. At 0.9 lbs (429 g) it weighs much less than the Harman Kardon Luna 2 at 1.6 lbs (735 g). It supports AAC Bluetooth, which the Harman Kardon Luna 2 lacks. Watch for: Bass extension isn’t very good.
Buy the Harman Kardon Luna 2. It is rated higher for sound quality, and the Sonos Roam is discontinued, so it is only available used.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A stylish waterproof speaker with clear, spacious mids, tight bass that stays clean at volume, and stereo pairing with a second unit.
A small, waterproof Wi-Fi and Bluetooth speaker with wireless charging, voice control 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Harman Kardon Luna 2 | Sonos Roam | |
|---|---|---|
| Price | $199.95 | $169.99 Discontinued |
| Ranked | #25 of 177 in Medium Size Portable Bluetooth Speakers | #95 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Sonos S2 App |
| Aux Input | No | No |
| Battery Life | 12 hours (Manufacturer specified) | 10 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC |
| EQ | Yes (4 presets + custom) | 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 | No | - |
| Weight | 1.6 lbs (735 g) | 0.9 lbs (429 g) |
| Bluetooth Version | 5.4 | 5.0 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 2.4” x 6.6” x 2.4” (62 x 168 x 60 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | Dual full-range drivers + passive radiators |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | - |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | - |
| Digital Aux Input | No | No |
| Strap | No | No |
| Bass Extension (-10dB) | - | 63Hz |
| Maximum SPL | - | 95dB (measured by Alan Ross Reviews) |
| Wi-Fi | - | Yes |
| Built-in Microphone | - | Yes |
| Voice Assistants | - | Amazon Alexa or Google Assistant (choose one) plus Sonos Voice Control |
Related Speaker Comparisons
More top alternatives to Harman Kardon Luna 2: