Short answer: the Tronsmart T8. It ranks #54 of 182 medium speakers by sound quality, rated 3.6/5, at $49.99; the Ultimate Ears Boom 4 ranks #114, rated 2.9/5, and costs $114.99, which makes this an easy call rather than a real tradeoff.
The Tronsmart T8 is the better-sounding option. An affordable waterproof speaker with upward firing drivers that spread sound around, plus lights, app EQ, an aux input and stereo pairing. It keeps a wired aux input, which the Ultimate Ears Boom 4 lacks. Watch for: Against the Xiaomi Sound Outdoor, listeners in Mateusz Cholewa’s comparison found the T8 harsh and tiring, and Techder Audios’ test showed the Xiaomi Sound Party with deeper, heavier bass.
The Ultimate Ears Boom 4 is the lighter choice. 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 noticeably less than the Tronsmart T8 at 1.8 lbs (800 g). The catch: Not much improvement over the old ones.
Buy the Tronsmart T8. It is rated higher for sound quality than the Ultimate Ears Boom 4 and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 14, 2026 at 6:17 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
| Tronsmart T8 | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $49.99 | $114.99 |
| Ranked | #54 of 182 in Medium Size Portable Bluetooth Speakers | #114 of 182 in Medium Size Portable Bluetooth Speakers |
| Stereo | Partially | Yes |
| Amplifier Power | 40W | - |
| App | Yes (Tronsmart) | Yes |
| Aux Input | Yes | No |
| Battery Life | 18 hours at 50% volume, lights off (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.1 |
| Charging Time | 4.5 hours | - |
| Dimensions | 8.6”H x 3.2”W x 3.2”D (218 x 82 x 82 mm) | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Drivers | 2x upward firing full-range drivers + 1x woofer + 2x passive radiators | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| EQ | Yes (app) | Yes (via app) |
| Frequency Response | 56Hz - 20kHz (Manufacturer specified) | - |
| IP Rating | IPX7 | IP67 |
| Lights | Yes | - |
| MicroSD Playback | Yes | - |
| Omnidirectional | Pointing up | No |
| Power Input | USB-C | USB-C |
| Strap | Yes (lanyard) | Yes (built-in loop) |
| TWS | Yes | Yes |
| Weight | 1.8 lbs (0.80 kg) | 1.4 lbs (620 g) |
| Built-in Microphone | - | No |
| Power Bank | - | No |
| Maximum SPL | - | 85dBC (Manufacturer specified) |
| Digital Aux Input | - | No |
| Bluetooth Codecs | - | SBC |
Where the Ratings Come From
- Tronsmart T8: reviews by Mateusz Cholewa, Techder Audios and Jagist.
- Ultimate Ears Boom 4: reviews by Smart Home Sounds and Cameron Dougherty Tech.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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