Short answer: the Kilburn II, since the Everboom’s data is still limited. The Everboom’s ranking may shift as more sound samples come in, and it has an upper bass boost with warm, rolled-off treble. The Kilburn II packs a 20W Class D amp with dual 8W tweeters, over 20 hours of battery, a 20 minute quick-charge worth 3 hours and a rugged leather-handled build, but it boosts upper bass, peaks in the upper mids and charges over AC.
In favor of the Ultimate Ears Everboom: There’s limited data so far, with its ranking possibly shifting as more sound samples come in. The downside: it has an upper bass boost, a warm tuning with rolled off treble, and bass that doesn’t go very deep.
Buy the Ultimate Ears Everboom. It is rated higher for sound quality than the Marshall Kilburn II and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
If water resistance matters to you, the Ultimate Ears Everboom at IP67 (brief submersion) holds up far better than the Marshall Kilburn II at IPX2 (light drips).
Want more options? Browse the full Portable Bluetooth rankings.
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Specifications Side By Side
| Marshall Kilburn II | Ultimate Ears Everboom | |
|---|---|---|
| Price | $219.00 | $149.99 |
| Ranked | #42 of 120 in Large Size Portable Bluetooth Speakers | #34 of 120 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~58Hz | - |
| Battery Life | 20 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| IP Rating | IPX2 | IP67 |
| Weight | 5.5 lbs (2.49 kg) | 2.1 lbs (949 g) |
| App | No | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | No | Yes |
| Party Mode | No | Yes (PartyUp up to 50 speakers) |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | Yes |
| TWS | Yes | No |
| Amplifier Power | 36W | 14W |
| Dimensions | 9.6” x 6.4” x 5.5” (243 x 162 x 140 mm) | 8.1” x 3.3” x 4.3” (205 x 85 x 110 mm) |
| Drivers | 1x 4” (102mm) woofer + 2x 20mm dome tweeters | 2x 56.6mm x 56.2mm fullrange transducers + 2x passive radiators |
| Maximum SPL | 102dB (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.0 | 5.1 |
| Strap | Yes (built-in strap) | Yes (built-in loop) |
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