Short answer: the Bogasing M5. It ranks #61 of 177 medium speakers by sound quality, rated 3.5/5, at $52.99; the Ultimate Ears Boom 4 ranks #112, rated 2.9/5, and costs $114.99, so there is little reason to consider the other one.
What the Ultimate Ears Boom 4 does well: A tough waterproof speaker that floats, with USB-C charging, app EQ and pairing with other UE speakers. It plays in stereo from a single unit, unlike the Bogasing M5. The catch: Not much improvement over the old ones.
The Bogasing M5 is the better-sounding, longer-running pick. A compact, backpack friendly speaker with very long battery life and USB-C charging at a budget price. It is rated for 30 hours of battery against 15 for the Ultimate Ears Boom 4. It keeps a wired aux input, which the Ultimate Ears Boom 4 lacks. Watch for: Front/rear driver configuration.
Buy the Bogasing M5. 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.
Want more options? Browse the full Portable Bluetooth rankings.
A tough waterproof speaker that floats, with USB-C charging, app EQ and pairing with other UE speakers.
A compact, backpack friendly speaker with very long battery life and USB-C charging at a budget price.
Prices on this page were last checked October 31, 2026 at 7:11 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 | Bogasing M5 | |
|---|---|---|
| Price | $114.99 | $52.99 |
| Ranked | #112 of 177 in Medium Size Portable Bluetooth Speakers | #61 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Battery Life | 15 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX7 |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No (front/rear drivers) |
| Omnidirectional | No | Yes |
| Weight | 1.4 lbs (620 g) | 1.7 lbs (757 g) |
| Bluetooth | Yes | Yes |
| 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” x 2.8” (160 x 76 x 71 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators | 30W system |
| TWS | Yes | Yes |
| EQ | Yes (via app) | Yes |
| Built-in Microphone | No | - |
| Power Bank | No | Yes (USB-A) |
| Aux Input | No | Yes |
| Maximum SPL | 85dBC (Manufacturer specified) | 96dB (measured by Alan Ross Reviews) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Strap | Yes (built-in loop) | - |
| Bass Extension (-10dB) | - | 61Hz |
| MicroSD Playback | - | Yes |
| USB Playback | - | Yes |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | - | 40W |
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