Short answer: the Bose Soundlink Revolve+ II. It ranks #52 of 175 medium speakers by sound quality, rated 3.6/5, at $299. The Ultimate Ears Boom 4 ranks #113, rated 2.9/5, at $129.99, $169.01 cheaper, which does not close the gap in sound quality.
The Bose Soundlink Revolve+ II is the better-sounding option. True 360° sound stays consistent no matter where you stand around it, unlike most portable speakers. It keeps a wired aux input, which the Ultimate Ears Boom 4 lacks. The catch: Overly boosted bass, warm sounding.
The Ultimate Ears Boom 4 is the lighter, tougher choice. IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. At 1.4 lbs (620 g) it weighs noticeably less than the Bose Soundlink Revolve+ II at 2 lbs (910 g). It is rated IP67 against IP55 for the Bose Soundlink Revolve+ II. It has an adjustable EQ, which the Bose Soundlink Revolve+ II lacks. The tradeoff: Not much improvement over the old ones.
Buy the Bose Soundlink Revolve+ II. It is rated higher for sound quality, and the $169.01 you would save on the Ultimate Ears Boom 4 does not close the gap.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Bose Soundlink Revolve+ II | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $299.00 | $129.99 |
| Ranked | #52 of 175 in Medium Size Portable Bluetooth Speakers | #113 of 175 in Medium Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Battery Life | 17 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| IP Rating | IP55 | IP67 |
| Power Input | Micro USB | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Yes | No |
| Weight | 2 lbs (0.91 kg) | 1.4 lbs (620 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 4.1 | 5.1 |
| Dimensions | 3.2” x 6” x 3.2” (82 x 152 x 82 mm) | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| App | Bose Connect | Yes |
| Built-in Microphone | Yes | No |
| Bluetooth Codecs | SBC | SBC |
| EQ | No | Yes (via app) |
| Drivers | 1x omnidirectional full-range transducer + 2x passive radiators (driver size undisclosed by Bose) | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| Digital Aux Input | No | No |
| TWS | Yes | Yes |
| Strap | No | Yes (built-in loop) |
| Power Bank | - | No |
| Maximum SPL | - | 85dBC (Manufacturer specified) |
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Prices on this page were last checked October 12, 2026 at 4:13 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+ II: $299.00 Amazon $299.00 eBay
Older model: the Bose Soundlink Revolve+ (ranked lower, rated 3.6/5). See every Bose SoundLink Revolve generation.
Same family: the Bose SoundLink Revolve (Series II) (smaller model, ranked lower, rated 3.6/5).
Pros: True 360° sound stays consistent no matter where you stand around it, unlike most portable speakers.
Cons: Overly boosted bass, warm sounding. Boosted mids. Rolled off treble. Only IP55.
Full Bose Soundlink Revolve+ II review and specifications →
| Released | Jan 2021 (5 years ago) |
|---|---|
| App | Bose Connect |
| Aux Input | Yes |
| Battery Life | 17 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.1 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 3.2” x 6” x 3.2” (82 x 152 x 82 mm) |
| Drivers | 1x omnidirectional full-range transducer + 2x passive radiators (driver size undisclosed by Bose) |
| EQ | No |
| IP Rating | IP55 |
| Omnidirectional | Yes |
| Power Input | Micro USB |
| Stereo | No |
| Strap | No |
| TWS | Yes |
| Weight | 2 lbs (0.91 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Soundcore Glow: best budget 360 degree speaker or get the Bose Revolve+? 1 hour of fun! More from alanrossreviews →
- Danny Pops: BEST Bose Speaker? Bose is getting lazy. More from DannyPops →
- Kanwar Anand: Bose Revolve Plus 1 vs 2
- techkiste.net: B&O Beosound A1 (2nd Gen) vs Bose Revolve 2 vs Bose Revolve+ 2 sound-comparison
- Head-to-Head Comparisons
- Bose Soundlink Revolve+ II vs Bose Soundlink Revolve+
- Bose Soundlink Revolve+ II vs W-King D320
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- Bose Soundlink Revolve+ II vs Bose SoundLink Revolve (Series II)
- Bose Soundlink Revolve+ II vs JBL Pulse 5
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Ultimate Ears Boom 4: $129.99 Amazon $129.99 eBay
Older model: the Ultimate Ears Boom 3 (ranked lower, rated 2.9/5). See every Ultimate Ears Wonderboom, Boom and Megaboom generation.
Same family: the Ultimate Ears Wonderboom 4 (smaller model, ranked higher, rated 2.9/5) and the Ultimate Ears Megaboom 4 (larger model, ranked lower, rated 2.1/5).
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 →
| Released | Jun 2024 (2 years ago) |
|---|---|
| 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
- Ultimate Ears Boom 4 vs Ultimate Ears Boom 3
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom
- Ultimate Ears Boom 4 vs Klipsch Groove
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 2
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 3
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 4
- Ultimate Ears Boom 4 vs DBSONO X-Blast F37
- Ultimate Ears Boom 4 vs Sony SRS-XE300
- See all 139 comparisons