These are not really the same size class, and that is the honest framing here. The Sony ULT Field 5 ranks #59 of 120 large speakers by sound quality at $348; the Sonos Roam 2 ranks #94 of 179 medium speakers by sound quality at $178.
The Sony ULT Field 5 is the longer-running, tougher pick. A tough, waterproof party speaker with loud, bass focused output, an aux input, a power bank and a long battery. It is rated for 25 hours of battery against 10 for the Sonos Roam 2. It is rated IP67 against IPX5 for the Sonos Roam 2. It supports LDAC Bluetooth, which the Sonos Roam 2 lacks. The tradeoff: It prioritizes bass and loudness over fidelity: reviews find the upper mids and highs subdued, with limited stereo separation and soundstage depth.
The Sonos Roam 2 is the lighter choice. 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 Sony ULT Field 5 at 7.3 lbs (3.3 kg). Watch for: Exact same sound quality as the original Sonos Roam.
Buy the Sony ULT Field 5 ($348) for a large speaker; the Sonos Roam 2 ($178) suits a medium speaker instead.
Want more options? Browse the full Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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
| Sony ULT Field 5 | Sonos Roam 2 | |
|---|---|---|
| Price | $348.00 | $178.00 |
| Ranked | #59 of 120 in Large Size Portable Bluetooth Speakers | #94 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Sonos S2 App |
| Aux Input | Yes | No |
| Battery Life | 25 hours (Manufacturer specified) | 10 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC, AAC |
| Bluetooth Version | 5.3 | 5.2 |
| Built-in Microphone | Yes | Yes |
| Dimensions | 12.6” x 5.7” x 4.9” (320 x 144 x 125 mm) | 2.4” x 6.6” x 2.4” (62 x 168 x 60 mm) |
| Drivers | 2x 46mm tweeters + 1x 79mm x 107mm woofer | 1x ~45mm racetrack mid-woofer + 1x tweeter + 2x passive radiators |
| EQ | Yes (App + ULT button) | Yes (via app, limited in Bluetooth mode) |
| IP Rating | IP67 | IPX5 |
| Party Mode | Yes (Party Connect up to 100 speakers) | - |
| Power Bank | Yes (USB-C) | - |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 7.3 lbs (3.3 kg) | 0.9 lbs (429 g) |
| Amplifier Power | 27W | - |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | No |
| Bass Extension (-10dB) | - | 63Hz |
| Wi-Fi | - | Yes |
| Voice Assistants | - | Amazon Alexa (Sonos Voice Control also built in) |
| Maximum SPL | - | 95dB (Manufacturer specified) |
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