Short answer: these speakers solve different problems: the Sonos Roam is a compact Wi-Fi extension of a Sonos home, while the Sony ULT Field 3 is a longer-running outdoor Bluetooth speaker. The Roam is unusually neutral for its size, supports Qi charging and voice control, and works with the wider Sonos ecosystem. Its weak bass and distortion when bass is raised keep expectations modest. The Sonos Roam is discontinued; its replacement is the Sonos Roam 2.
The ULT Field 3 costs $208 and brings IP67 protection, a 24-hour claimed battery, USB-C power output, stereo pairing and Party Connect. Its hollow, treble-boosted sound needs careful EQ, and the ULT bass mode disables that custom EQ.
The Roam is the smarter buy only when Wi-Fi and Sonos integration are central. For trips, parties and battery endurance, Sony’s much larger speaker is the more versatile tool.
Buy the Sonos Roam if you want a tiny, neutral speaker that can join a Sonos multi-room system and charge wirelessly.
Buy the Sony ULT Field 3 if you need long battery life, IP67 protection, stereo pairing and phone charging away from home.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A small, waterproof Wi-Fi and Bluetooth speaker with wireless charging, voice control and Sonos multiroom support.
A rugged waterproof stereo speaker with long battery life, a detailed app EQ, a shoulder strap and a phone charging port.
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Specifications Side By Side
| Sonos Roam | Sony ULT Field 3 | |
|---|---|---|
| Price | $169.99 Discontinued | $208.00 |
| Ranked | #95 of 179 in Medium Size Portable Bluetooth Speakers | #71 of 179 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 63Hz | - |
| Battery Life | 10 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Maximum SPL | 95dB (measured by Alan Ross Reviews) | - |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| Weight | 0.9 lbs (429 g) | 2.6 lbs (1.2 kg) |
| Wi-Fi | Yes | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.0 | 5.2 |
| Dimensions | 2.4” x 6.6” x 2.4” (62 x 168 x 60 mm) | 10.1” x 4.4” x 3.1” (256 x 113 x 79 mm) |
| App | Sonos S2 App | Yes |
| Bluetooth Codecs | SBC, AAC | SBC, AAC, LDAC |
| Built-in Microphone | Yes | Yes |
| Voice Assistants | Amazon Alexa or Google Assistant (choose one) plus Sonos Voice Control | - |
| EQ | Yes (via app, limited in Bluetooth mode) | Yes (App + ULT button) |
| Drivers | Dual full-range drivers + passive radiators | 1x 20mm tweeter + 1x 86mm x 46mm woofer |
| IP Rating | IPX5 | IP67 |
| Digital Aux Input | No | No |
| Aux Input | No | No |
| TWS | Yes | Yes |
| Power Input | USB-C | USB-C |
| Strap | No | Yes (detachable shoulder strap) |
| Party Mode | - | Yes (Party Connect up to 100 speakers) |
| Power Bank | - | Yes (USB-C, 5V/1.5A) |
| Amplifier Power | - | 27W |
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