Short answer: the Sonos Roam 2. It ranks #94 of 177 medium speakers by sound quality, rated 3.2/5, at $179; the Ultimate Ears Megaboom 4 ranks #171, rated 2.1/5, and costs $200, so there is little reason to consider the other one.
The Ultimate Ears Megaboom 4 is the longer-running, tougher choice. A tough waterproof speaker that floats, with USB-C charging, a long battery and PartyUp linking. It is rated for 20 hours of battery against 10 for the Sonos Roam 2. It is rated IP67 against IPX5 for the Sonos Roam 2. The tradeoff: A lot of distortion at higher volumes.
The Sonos Roam 2 is the better-sounding, lighter pick. A small Wi-Fi and Bluetooth speaker with water resistance, Alexa built in and Sonos multiroom support. At 0.9 lbs (429 g) it weighs much less than the Ultimate Ears Megaboom 4 at 2.4 lbs (1.1 kg). It supports AAC Bluetooth, which the Ultimate Ears Megaboom 4 lacks. Watch for: Exact same sound quality as the original Sonos Roam.
Buy the Sonos Roam 2. It is rated higher for sound quality than the Ultimate Ears Megaboom 4 and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A tough waterproof speaker that floats, with USB-C charging, a long battery and PartyUp linking.
A small Wi-Fi and Bluetooth speaker with water resistance, Alexa built in and Sonos multiroom support.
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Specifications Side By Side
| Ultimate Ears Megaboom 4 | Sonos Roam 2 | |
|---|---|---|
| Price | $200 | $179.00 |
| Ranked | #171 of 177 in Medium Size Portable Bluetooth Speakers | #94 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Sonos S2 App |
| Battery Life | 20 hours (Manufacturer specified) | 10 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX5 |
| Party Mode | Yes (PartyUp up to 50 speakers) | - |
| Stereo | No | No |
| Omnidirectional | Yes | No |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | 5.2 |
| Dimensions | 3.4” x 3.4” x 8.9” (87 x 87 x 225 mm) | 2.4” x 6.6” x 2.4” (62 x 168 x 60 mm) |
| Drivers | 2x 50x50mm full-range + 2x 55x86mm passive radiators | 1x ~45mm racetrack mid-woofer + 1x tweeter + 2x passive radiators |
| TWS | Yes | Yes |
| EQ | Yes (via app) | Yes (via app, limited in Bluetooth mode) |
| Power Input | USB-C | USB-C |
| Built-in Microphone | No | Yes |
| Weight | 2.4 lbs (1.1 kg) | 0.9 lbs (429 g) |
| Maximum SPL | 91dB (Manufacturer specified) | 95dB (Manufacturer specified) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC, AAC |
| Aux Input | No | No |
| Strap | Yes (built-in loop) | No |
| Bass Extension (-10dB) | - | 63Hz |
| Wi-Fi | - | Yes |
| Voice Assistants | - | Amazon Alexa (Sonos Voice Control also built in) |
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