Short answer: the Ultimate Ears Boom 4 if sound quality matters most, the Ultimate Ears Roll 2 if price matters most. The Ultimate Ears Boom 4 ranks #88 of 136 medium speakers at $105. The Ultimate Ears Roll 2 ranks #125 at $100, $5 cheaper.
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%
What the Ultimate Ears Roll 2 offers: Thin, flat profile fits easily in a bag or purse; light at 0.73 lb. Built-in bungee cord for hanging from a hook, nail, or door handle. Life-resistant waterproof/dustproof shell. Watch for: Not stereo. Barely any bass, rolled off treble off axis
Buy the Ultimate Ears Boom 4 if sound quality is the priority over the price, or the Ultimate Ears Roll 2 if the price is the priority over sound quality.
The Ultimate Ears Roll 2 is not a sound-quality pick. It sits near the bottom of the 136 medium speakers; there are better options higher up.
There is a real battery-life gap here: the Ultimate Ears Boom 4 is rated for 15 hours, the Ultimate Ears Roll 2 only 9 hours.
Specifications Side By Side
| Ultimate Ears Boom 4 | Ultimate Ears Roll 2 | |
|---|---|---|
| Price | $105 | $100 |
| Ranked | #88 of 136 in Medium Size Portable Bluetooth Speakers | #125 of 136 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (UE Roll app) |
| Battery Life | 15 hours (Manufacturer specified) | 9 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX7 |
| Power Input | USB-C | Micro USB |
| Stereo | Yes | - |
| Omnidirectional | No | No |
| Weight | 1.4 lbs / 620 g | 0.7 lbs / 330 g |
| Bluetooth Version | 5.1 | 4.0 |
| Dimensions | 7.2" x 2.9" x 2.9" (184 x 73 x 73 mm) | 5.9" x 5.3" x 1.6" (149.5 x 135 x 40 mm) |
| Drivers | 2x 1.57" (40mm) active drivers + 2x 1.81" x 2.57" (46.1 x 65.2mm) passive radiators | 1x 2" full-range + 2x 0.75" tweeters |
| TWS | Yes | No |
| EQ | Yes (via app) | - |
| Built in Microphone | No | No |
| Power Bank | No | - |
| Aux Input | No | Yes |
| Max Volume | 85dBC | - |
| Digital Aux Input | No | No |
Related Speaker Comparisons
A few more comparisons worth a look in the same class:
- Bose Soundlink Mini vs Ultimate Ears Wonderboom
- JBL Charge Essential vs Ultimate Ears Boom 3
- Sonos Roam vs Ultimate Ears Wonderboom
- Sony XB23 vs Ultimate Ears Boom 4
- JBL Grip vs Ultimate Ears Boom 4
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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
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
Ultimate Ears Roll 2: $100 eBay
Pros: Thin, flat profile fits easily in a bag or purse; light at 0.73 lb. Built-in bungee cord for hanging from a hook, nail, or door handle. Life-resistant waterproof/dustproof shell.
Cons: Not stereo. Barely any bass, rolled off treble off axis
Full Ultimate Ears Roll 2 review and specifications →
| App | Yes (UE Roll app) |
|---|---|
| Aux Input | Yes |
| Battery Life | 9 hours (Manufacturer specified) |
| Bluetooth Version | 4.0 |
| Built in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 5.9" x 5.3" x 1.6" (149.5 x 135 x 40 mm) |
| Drivers | 1x 2" full-range + 2x 0.75" tweeters |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Power Input | Micro USB |
| TWS | No |
| Weight | 0.7 lbs / 330 g |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Ultimate Ears Roll 2 vs EFM Toledo
- Ultimate Ears Roll 2 vs Beats Pill+
- Ultimate Ears Roll 2 vs Skullcandy Terrain/Terrain XT/Terrain XL
- Ultimate Ears Roll 2 vs Harman Kardon Esquire 2
- Ultimate Ears Roll 2 vs Ultimate Ears Megaboom 4
- Ultimate Ears Roll 2 vs Tribit Stormbox Mini
- Ultimate Ears Roll 2 vs Zealot S61
- Ultimate Ears Roll 2 vs Sony SRS-XE200
- See all 72 comparisons