Short answer: the Sonos Roam 2. It ranks #92 of 164 medium speakers by sound quality, rated 3.2/5, at $179. The Ultimate Ears Boom 4 ranks #110, rated 2.9/5, at $149.99, $29.01 cheaper, not enough of a saving to outweigh the sound-quality gap.
Buy the Sonos Roam 2. It is rated higher for sound quality, and the $29.01 saving on the Ultimate Ears Boom 4 is not enough to make up the difference.
Battery life favors the Ultimate Ears Boom 4: rated for 15 hours against 10 hours for the Sonos Roam 2.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Sonos Roam 2 | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $179.00 | $149.99 |
| Ranked | #92 of 164 in Medium Size Portable Bluetooth Speakers | #110 of 164 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 63Hz | - |
| Battery Life | 10 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| Weight | 0.9 lbs (429 g) | 1.4 lbs (620 g) |
| Wi-Fi | Yes | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.2 | 5.1 |
| Dimensions | 2.4” x 6.6” x 2.4” (62 x 168 x 60 mm) | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| App | Sonos S2 App | Yes |
| Bluetooth Codecs | SBC, AAC | SBC |
| Built-in Microphone | Yes | No |
| Voice Assistants | Amazon Alexa (Sonos Voice Control also built in) | - |
| EQ | Yes (via app, limited in Bluetooth mode) | Yes (via app) |
| Drivers | 1x ~45mm racetrack mid-woofer + 1x tweeter + 2x passive radiators | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| IP Rating | IPX5 | IP67 |
| Maximum SPL | 95dB (Manufacturer specified) | 85dBC (Manufacturer specified) |
| Digital Aux Input | No | No |
| Aux Input | No | No |
| TWS | Yes | Yes |
| Power Input | USB-C | USB-C |
| Strap | No | Yes (built-in loop) |
| Power Bank | - | No |
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How Sonos Roam 2 compares with other leading options:
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- Soundcore Motion 300 vs Sonos Roam 2
- Sonos Roam 2 vs Soundcore Boost “upgraded” 2021
- Minirig 4 vs Sonos Roam 2
- B&O Beosound A1 2nd gen vs Sonos Roam 2
Prices on this page were last checked October 4, 2026 at 9:58 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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The Two Speakers In Full
Sonos Roam 2: $179.00 Amazon eBay
Older model: the Sonos Roam (ranked lower, rated 3.1/5).
Pros: Very neutral. Additional button for pairing instead of being shared with power button. Measured bass extension of 63Hz (-10dB).
Cons: Exact same sound quality as the original Roam. Bass extension isn’t very good. Not stereo. Gets distorted as you turn up the bass.
Full Sonos Roam 2 review and specifications →
| App | Sonos S2 App |
|---|---|
| Aux Input | No |
| Bass Extension (-10dB) | 63Hz |
| Battery Life | 10 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 2.4” x 6.6” x 2.4” (62 x 168 x 60 mm) |
| Drivers | 1x ~45mm racetrack mid-woofer + 1x tweeter + 2x passive radiators |
| EQ | Yes (via app, limited in Bluetooth mode) |
| IP Rating | IPX5 |
| Maximum SPL | 95dB (Manufacturer specified) |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | No |
| TWS | Yes |
| Voice Assistants | Amazon Alexa (Sonos Voice Control also built in) |
| Weight | 0.9 lbs (429 g) |
| Wi-Fi | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Ultimate Ears Boom 4: $149.99 Amazon eBay
Older model: the Ultimate Ears Boom 3 (ranked lower, rated 2.9/5).
Pros: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app.
Cons: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%
Full Ultimate Ears Boom 4 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 85dBC (Manufacturer specified) |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 1.4 lbs (620 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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