Short answer: the Bose Soundlink Revolve+ II for better sound quality, the Ultimate Ears Boom 4 for the lower price. The Bose Soundlink Revolve+ II ranks #45 of 136 medium speakers at $259. The Ultimate Ears Boom 4 ranks #88 at $105, $154 cheaper.
What the Bose Soundlink Revolve+ II offers: True 360° sound stays consistent no matter where you stand around it, unlike most portable speakers. Watch for: Overly boosted bass, warm sounding. Boosted mids. Rolled off treble. Only IP55.
What the Ultimate Ears Boom 4 offers: 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. Watch for: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%
Buy the Bose Soundlink Revolve+ II if sound quality matters more than the price. Buy the Ultimate Ears Boom 4 if the price matters more than sound quality.
Specifications Side By Side
| Bose Soundlink Revolve+ II | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $259.00 | $105 |
| Ranked | #45 of 136 in Medium Size Portable Bluetooth Speakers | #88 of 136 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 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 | - |
| 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 |
| Power Bank | - | No |
| Max Volume | - | 85dBC |
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- Bose Soundlink Revolve+ vs Sony SRS-XE300
- Harman Kardon Luna vs W-King D320
- Bose Soundlink Revolve+ II vs Bose SoundLink Color II
- Bose Soundlink Revolve+ II vs Soundcore Boom 3i
Prices on this page were last checked August 27, 2026 at 10:09 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: $259.00 Amazon eBay
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 →
| App | Bose Connect |
|---|---|
| Aux Input | Yes |
| Battery Life | 17 hours (Manufacturer specified) |
| 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 |
| Weight | 2 lbs / 0.91 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Bose Soundlink Revolve+ II vs Bose Soundlink Revolve+
- Bose Soundlink Revolve+ II vs W-King D320
- Bose Soundlink Revolve+ II vs Soundcore Glow
- Bose Soundlink Revolve+ II vs JBL Pulse 5
- Bose Soundlink Revolve+ II vs Bose Soundlink Revolve
- Bose Soundlink Revolve+ II vs Tribit Stormbox Flow
- Bose Soundlink Revolve+ II vs Xiaomi Sound Outdoor
- Bose Soundlink Revolve+ II vs Tribit Stormbox Pro
- See all 75 comparisons
Ultimate Ears Boom 4: $105 Amazon eBay
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 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 |
| Max Volume | 85dBC |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| 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/Heritage 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 Sony SRS-XE300
- Ultimate Ears Boom 4 vs Tribit Stormbox
- See all 74 comparisons