Short answer: the Minirig 4. It ranks #7 of 177 medium speakers by sound quality, rated 4.3/5, at $229.95. The Ultimate Ears Boom 3 ranks #113, rated 2.9/5, at $132.99, $96.96 cheaper, which does not close the gap in sound quality.
The Minirig 4 is the better-sounding, deeper-bass choice. A small, long lasting speaker that gets loud and can add a matching subwoofer, with a 30 hour battery. Its bass reaches about 56Hz before falling 10dB, against 91Hz for the Ultimate Ears Boom 3. It is rated for 30 hours of battery against 15 for the Ultimate Ears Boom 3. It supports AAC Bluetooth, which the Ultimate Ears Boom 3 lacks. Watch for: Calls itself splash resistant and has no official water rating.
The Ultimate Ears Boom 3 is the tougher choice. A rugged waterproof speaker that floats, with a fabric shell, a stable Bluetooth connection and PartyUp linking for many speakers. It is rated IP67 against Splash resistant for the Minirig 4. It plays in stereo from a single unit, unlike the Minirig 4. The tradeoff: Not stereo, barely any bass, recessed treble.
Buy the Minirig 4. It is rated higher for sound quality, and the $96.96 you would save on the Ultimate Ears Boom 3 does not close the gap.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A small, long lasting speaker that gets loud and can add a matching subwoofer, with a 30 hour battery.
A rugged waterproof speaker that floats, with a fabric shell, a stable Bluetooth connection and PartyUp linking for many speakers.
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
| Minirig 4 | Ultimate Ears Boom 3 | |
|---|---|---|
| Price | $229.95 | $132.99 |
| Ranked | #7 of 177 in Medium Size Portable Bluetooth Speakers | #113 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (Ultimate Ears BOOM & MEGABOOM app) |
| Aux Input | Yes | No |
| Aux Latency | 0ms | - |
| Bass Extension (-10dB) | 56Hz | 91Hz |
| Battery Life | 30 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC |
| EQ | Yes | Yes (via app) |
| IP Rating | Splash resistant | IP67 |
| Bluetooth Latency | 60ms | - |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | 87dB (Manufacturer specified) |
| Power Bank | Yes (USB-C) | - |
| Power Input | USB-C | Micro USB |
| Stereo | No | Yes |
| Omnidirectional | Pointing up | Yes |
| TWS | Yes (Bluetooth or cable) | Yes |
| Weight | 1.2 lbs (550 g) | 1.3 lbs (608 g) |
| Bluetooth Version | 5.0 | 4.2 |
| Dimensions | 4” x 2.9” (101.6 x 73 mm) (diameter x height) | 7.2” x 2.9” (184 x 73 mm) |
| Drivers | 70mm custom driver | 2x 2” active drivers + 2x 2” x 4” passive radiators |
| Frequency Response | 60Hz - 18kHz (Manufacturer specified) | - |
| Amplifier Power | 50W | - |
| Built-in Microphone | Yes | No |
| Digital Aux Input | No | No |
| Party Mode | - | Yes (PartyUp up to 50 speakers) |
| Strap | - | Yes (built-in loop) |
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