Short answer: the Sonos Roam 2 is the better fit for a connected home audio system, while the Ultimate Ears Wonderboom 4 is the simpler little speaker for wet and casual use. Sonos is 92 of 164; Ultimate Ears is 106 of 164.
The Roam 2 is voiced neutrally and its dedicated pairing button makes it easier to use than the original. It remains mono, has limited bass reach, and retains the original Roam’s sound rather than delivering a major performance update.
The Wonderboom 4 is small and practical, but bass is shallow and somewhat thuddy. USB-C is its main advance over the Wonderboom 3, so it is a convenience refresh rather than an acoustic overhaul.
Buy the Sonos Roam 2 if you value neutral sound and integration with your Sonos system.
Buy the Ultimate Ears Wonderboom 4 if you want a simple, small waterproof speaker and USB-C charging.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Sonos Roam 2 | Ultimate Ears Wonderboom 4 | |
|---|---|---|
| Price | $179.00 | $78.95 |
| Ranked | #92 of 164 in Medium Size Portable Bluetooth Speakers | #106 of 164 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 63Hz | - |
| Battery Life | 10 hours (Manufacturer specified) | 14 hours (Manufacturer specified) |
| Stereo | No | No |
| Omnidirectional | No | Yes |
| Weight | 0.9 lbs (429 g) | 0.9 lbs (420 g) |
| Wi-Fi | Yes | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.2 | 5.2 |
| Dimensions | 2.4” x 6.6” x 2.4” (62 x 168 x 60 mm) | 4.1” x 3.8” (104 x 95.3 mm) |
| App | Sonos S2 App | No |
| 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) | No |
| Drivers | 1x ~45mm racetrack mid-woofer + 1x tweeter + 2x passive radiators | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| IP Rating | IPX5 | IP67 |
| Maximum SPL | 95dB (Manufacturer specified) | 87dB (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) |
| Party Mode | - | No |
| Power Bank | - | No |
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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 Wonderboom 4: $78.95 Amazon eBay
Older models: the Ultimate Ears Wonderboom 3 (ranked lower, rated 2.9/5), the Ultimate Ears Wonderboom 2 (ranked lower, rated 2.9/5) and the Ultimate Ears Wonderboom (ranked lower, rated 2.9/5).
Pros: Small size.
Cons: Bass isn’t as deep as the top-ranked speakers and is a little thuddy. Not much improvement over the previous Ultimate Ears Wonderboom 3 besides the USB-C charging port.
Full Ultimate Ears Wonderboom 4 review and specifications →
| App | No |
|---|---|
| Aux Input | No |
| Battery Life | 14 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| EQ | No |
| IP Rating | IP67 |
| Maximum SPL | 87dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 0.9 lbs (420 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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