Short answer: the Ultimate Ears Boom 4, if you are buying new. The Sonos Roam ranks higher than it (#93 vs #110 of 164 medium speakers, 3.1/5 vs 2.9/5) but is discontinued, so only consider it used; the Ultimate Ears Boom 4 is still sold new at $149.99.
Buy the Ultimate Ears Boom 4, since the Sonos Roam is discontinued and only worth hunting down used.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Sonos Roam | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $179.99 Discontinued | $149.99 |
| Ranked | #93 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) |
| Maximum SPL | 95dB (measured by Alan Ross Reviews) | 85dBC (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 | 5.0 | 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 or Google Assistant (choose one) plus Sonos Voice Control | - |
| EQ | Yes (via app, limited in Bluetooth mode) | Yes (via app) |
| Drivers | Dual full-range drivers + 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 |
| 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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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: $179.99 Discontinued Amazon eBay
Newer model: the Sonos Roam 2, ranked higher, rated 3.2/5.
Pros: Very neutral. IP67 rated at ~1 lb. Wireless (Qi) charging: rare for a portable speaker. Works with Alexa/Sonos Voice Control and the wider Sonos ecosystem over Wi-Fi. Measured bass extension of 63Hz (-10dB).
Cons: Bass extension isn’t very good. Not stereo. Gets distorted if you turn up the bass. Discontinued.
Full Sonos Roam 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 | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 2.4” x 6.6” x 2.4” (62 x 168 x 60 mm) |
| Drivers | Dual full-range drivers + passive radiators |
| EQ | Yes (via app, limited in Bluetooth mode) |
| IP Rating | IPX5 |
| Maximum SPL | 95dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | No |
| TWS | Yes |
| Voice Assistants | Amazon Alexa or Google Assistant (choose one) plus Sonos Voice Control |
| 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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