Short answer: the Ultimate Ears Boom 4, though neither ranks well in its class. It ranks #93 of 144 medium speakers by sound quality, rated 2.9/5, at $119.99. The Skullcandy Terrain XL ranks #134, rated 2.1/5, at $79.99, $40 cheaper, which does not close the gap in sound quality. Both are rated below 3.0/5 among the 144 medium speakers, so if sound quality matters, consider the Earfun Uboom L instead, ranked #1 at $49.79.
Why pick the Ultimate Ears Boom 4: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. The tradeoff: Not much improvement over the old ones.
What the Skullcandy Terrain XL does well: The loudest and longest-running of the Terrain line at 95dB and 18 hours, and the only one with a built-in microphone. The catch: Shares the Terrain line’s tuning: no bass, very rolled off treble, and distortion in the treble.
Buy the Ultimate Ears Boom 4. It is rated higher for sound quality, and the $40 saving on the Skullcandy Terrain XL is not enough to make up the difference.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Ultimate Ears Boom 4 | Skullcandy Terrain XL | |
|---|---|---|
| Price | $119.99 | $79.99 |
| Ranked | #93 of 144 in Medium Size Portable Bluetooth Speakers | #134 of 144 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 15 hours (Manufacturer specified) | 18 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX7 |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| Weight | 1.4 lbs (620 g) | 1.4 lbs (635 g) |
| Bluetooth Version | 5.1 | 5.3 |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) | 7.5” x 3.5” x 3.5” (190.5 x 88.9 x 88.9 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators | 2x 48mm drivers + passive radiators |
| TWS | Yes | Yes |
| EQ | Yes (via app) | No |
| Built-in Microphone | No | Yes |
| Power Bank | No | - |
| Aux Input | No | No |
| Maximum SPL | 85dBC (Manufacturer specified) | 95dB SPL (Manufacturer specified) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC |
| Strap | Yes (built-in loop) | Yes (wrist strap) |
| Party Mode | - | Yes (SKDY Multi-Link, up to 99 speakers) |
| Amplifier Power | - | 2 x 20W |
Related Speaker Comparisons
More top alternatives to Ultimate Ears Boom 4:
- Ultimate Ears Boom 4 vs Earfun Uboom L
- Soundcore Motion 300 vs Ultimate Ears Boom 4
- Soundcore Motion+ vs Ultimate Ears Boom 4
- Soundcore Boost “upgraded” 2021 vs Ultimate Ears Boom 4
- Ultimate Ears Boom 4 vs Minirig 4
Prices on this page were last checked September 26, 2026 at 11:14 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: $119.99 Amazon eBay
Older model: the Ultimate Ears Boom 3 (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 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/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 DBSONO X-Blast F37
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 4
- Ultimate Ears Boom 4 vs Sony SRS-XE300
- See all 113 comparisons
Skullcandy Terrain XL: $79.99 Amazon eBay
Pros: The loudest and longest-running of the Terrain line at 95dB and 18 hours, and the only one with a built-in microphone. IPX7 rated with a nylon wrist wrap. Multi-Link pairs it with other Skullcandy speakers.
Cons: Shares the Terrain line’s tuning: no bass, very rolled off treble, and distortion in the treble. The extra size buys volume and runtime, not better sound.
Full Skullcandy Terrain XL review and specifications →
| Amplifier Power | 2 x 20W |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 18 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 7.5” x 3.5” x 3.5” (190.5 x 88.9 x 88.9 mm) |
| Drivers | 2x 48mm drivers + passive radiators |
| EQ | No |
| IP Rating | IPX7 |
| Maximum SPL | 95dB SPL (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | Yes (SKDY Multi-Link, up to 99 speakers) |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (wrist strap) |
| TWS | Yes |
| Weight | 1.4 lbs (635 g) |
- Reviews, Comparisons and Sound Samples
- Jay’s Straight Up Reviews & More: Newly Released! Skullcandy Terrain XL 🦨 Quick Overview & Sound Comparison with JBL Flip 6 & Tozo PA1 More from JaysStraightUpReviews →
- FishBee Product Reviews: Why is NO ONE Buying the New Skullcandy Speakers?? More from FishBee Product Reviews →
- Flossy Carter: All The New SkullCandy Bluetooth Speakers More from FlossyCarter →
- Head-to-Head Comparisons
- Skullcandy Terrain XL vs Beats Pill+
- Skullcandy Terrain XL vs Ultimate Ears Megaboom 4
- Skullcandy Terrain XL vs Marshall Emberton II
- Skullcandy Terrain XL vs Marshall Emberton III
- Skullcandy Terrain XL vs Ultimate Ears Wonderboom 4
- Skullcandy Terrain XL vs Tribit Stormbox 2
- Skullcandy Terrain XL vs Sony ULT Field 1
- Skullcandy Terrain XL vs JBL Grip
- See all 12 comparisons