These sit in different size classes, so this is not a straight ranking comparison. The Ultimate Ears Boom 4 ranks #113 of 179 medium speakers by sound quality at $114.99; the Xdobo X8 Max ranks #88 of 120 large speakers by sound quality at $105.99. Both are rated below 3.0/5 for their class (179 medium speakers and 120 large speakers), so if sound quality matters, look higher up the rankings.
The Ultimate Ears Boom 4 is the lighter pick. A tough waterproof speaker that floats, with USB-C charging, app EQ and pairing with other UE speakers. At 1.4 lbs (620 g) it weighs much less than the Xdobo X8 Max at 6.3 lbs (2.86 kg). It has an adjustable EQ, which the Xdobo X8 Max lacks. The tradeoff: Not much improvement over the old ones.
Why pick the Xdobo X8 Max: A feature packed waterproof boombox with a huge battery, power bank output, and enough volume for outdoor background music. It keeps a wired aux input, which the Ultimate Ears Boom 4 lacks. Watch for: The voicing is bass-heavy with thin, boosted highs that can turn harsh, and reviews report distortion rather than clean dynamics when pushed hard.
Buy the Ultimate Ears Boom 4 ($114.99) for a medium speaker; the Xdobo X8 Max ($105.99) suits a large speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| Ultimate Ears Boom 4 | Xdobo X8 Max | |
|---|---|---|
| Price | $114.99 | $105.99 |
| Ranked | #113 of 179 in Medium Size Portable Bluetooth Speakers | #88 of 120 in Large Size Portable Bluetooth Speakers |
| App | Yes | No |
| Battery Life | 15 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX7 |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Weight | 1.4 lbs (620 g) | 6.3 lbs (2.86 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | 5.0 |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) | 11.8” x 4.3” x 5.3” (300 x 110 x 134 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators | 2x 80mm woofers, 2x 52mm tweeters |
| TWS | Yes | Yes |
| EQ | Yes (via app) | No |
| Built-in Microphone | No | Yes |
| Power Bank | No | Yes (USB-A) |
| Aux Input | No | Yes |
| Maximum SPL | 85dBC (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC |
| Strap | Yes (built-in loop) | - |
| Bass Extension (-10dB) | - | ~52Hz |
| MicroSD Playback | - | Yes |
| Party Mode | - | No |
| Amplifier Power | - | 100W |
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