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 ranks #135, rated 2.1/5, at $49.94, $70.05 cheaper, a saving that is not big enough to make up the sound-quality gap. Both are rated below 3.0/5 among the 144 medium speakers, and the Earfun Uboom L, ranked #1 at $49.79, is a better place to start if sound quality matters.
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.
Why pick the Skullcandy Terrain: IPX7 rated with a nylon wrist wrap for carrying. The catch: No bass, very rolled off treble.
Buy the Ultimate Ears Boom 4. It is rated higher for sound quality, and saving $70.05 with the Skullcandy Terrain does not make up for the sound-quality gap.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Ultimate Ears Boom 4 | Skullcandy Terrain | |
|---|---|---|
| Price | $119.99 | $49.94 |
| Ranked | #93 of 144 in Medium Size Portable Bluetooth Speakers | #135 of 144 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 15 hours (Manufacturer specified) | 14 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 lbs (458 g) |
| Bluetooth Version | 5.1 | 5.3 |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) | 6.3” x 3.1” x 3.1” (160 x 79 x 79 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 | No |
| Power Bank | No | - |
| Aux Input | No | No |
| Maximum SPL | 85dBC (Manufacturer specified) | 90dB 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 6W |
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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.
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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
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Skullcandy Terrain: $49.94 Amazon eBay
Pros: IPX7 rated with a nylon wrist wrap for carrying. 14 hour battery life. Multi-Link pairs it with other Skullcandy speakers.
Cons: No bass, very rolled off treble. Distortion in the treble. Just doesn’t sound good
Full Skullcandy Terrain review and specifications →
| Amplifier Power | 2 x 6W |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 14 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 6.3” x 3.1” x 3.1” (160 x 79 x 79 mm) |
| Drivers | 2x 48mm drivers + passive radiators |
| EQ | No |
| IP Rating | IPX7 |
| Maximum SPL | 90dB 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 lbs (458 g) |
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