Short answer: the Bose SoundLink Revolve (Series II). It ranks #51 of 150 medium speakers by sound quality, rated 3.6/5, at $194. The Ultimate Ears Boom 4 ranks #99, rated 2.9/5, at $109.99, $84.01 cheaper, not enough of a saving to outweigh the sound-quality gap.
What the Bose SoundLink Revolve (Series II) does well: RTINGS measured a fairly neutral sound with a balanced midrange, so vocals and lead instruments come through clearly, and excellent directivity from the 360° design for an open, even sound around the room. The tradeoff: RTINGS found it lacks low bass, so there’s little deep thump or rumble.
Why pick the Ultimate Ears Boom 4: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. Watch for: Not much improvement over the old ones.
Buy the Bose SoundLink Revolve (Series II). It is rated higher for sound quality, and the $84.01 you would save on the Ultimate Ears Boom 4 does not close the gap.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Bose SoundLink Revolve (Series II) | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $194.00 | $109.99 |
| Ranked | #51 of 150 in Medium Size Portable Bluetooth Speakers | #99 of 150 in Medium Size Portable Bluetooth Speakers |
| App | Bose Connect | Yes |
| Aux Input | Yes | No |
| Battery Life | 13 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Built-in Microphone | Yes | No |
| IP Rating | IP55 | IP67 |
| Omnidirectional | Yes | No |
| Stereo | No | Yes |
| Weight | 1.5 lbs (680 g) | 1.4 lbs (620 g) |
| Power Input | - | USB-C |
| Bluetooth Version | - | 5.1 |
| 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 |
| TWS | - | Yes |
| EQ | - | Yes (via app) |
| Power Bank | - | No |
| Maximum SPL | - | 85dBC (Manufacturer specified) |
| Digital Aux Input | - | No |
| Bluetooth Codecs | - | SBC |
| Strap | - | Yes (built-in loop) |
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Prices on this page were last checked September 30, 2026 at 2:57 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
Bose SoundLink Revolve (Series II): $194.00 Amazon eBay
Older model: the Bose Soundlink Revolve (ranked lower, rated 3.5/5).
Pros: RTINGS measured a fairly neutral sound with a balanced midrange, so vocals and lead instruments come through clearly, and excellent directivity from the 360° design for an open, even sound around the room. In a side by side test against the Revolve+ II and B&O Beosound A1 2nd gen, several listeners preferred its clearer, less bass heavy tuning to the Revolve+ II. Up to 13 hours of battery, IP55 dust and water resistance, a built-in microphone for calls and voice assistants, and multi-connect for two devices at once.
Cons: RTINGS found it lacks low bass, so there’s little deep thump or rumble. It doesn’t get loud either: DXOMARK measured only about 73 to 74 dBA at maximum volume, against 85 to 89 dBA for speakers like the Sony SRS-XB43 in the same test, and bass compresses and pumps as you turn it up. There is no EQ in the Bose Connect app, a single unit plays mono, and it still charges over micro USB.
Full Bose SoundLink Revolve (Series II) review and specifications →
| App | Bose Connect |
|---|---|
| Aux Input | Yes |
| Battery Life | 13 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Built-in Microphone | Yes |
| IP Rating | IP55 |
| Omnidirectional | Yes |
| Stereo | No |
| Weight | 1.5 lbs (680 g) |
- Links
- Reviews, Comparisons and Sound Samples
- RTINGS: Bose SoundLink Revolve II Review More from Rtings.com →
- DXOMARK: Bose SoundLink Revolve II Speaker review
- SoundGuys: Bose SoundLink Revolve II review More from Soundguys →
- techkiste.net: B&O Beosound A1 (2nd Gen) vs Bose Revolve 2 vs Bose Revolve+ 2 sound-comparison
- Danny Pops: BEST Bose Speaker? Bose is getting lazy. More from DannyPops →
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Ultimate Ears Boom 4: $109.99 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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