Short answer: the Minirig 4 for better sound quality, the Ultimate Ears Boom 3 for the lower price. The Minirig 4 ranks #6 of 142 medium speakers at $229.95. The Ultimate Ears Boom 3 ranks #92 at $149.99, $79.96 cheaper.
What the Minirig 4 offers: Modular, can easily attach a subwoofer. Finally USB-C charging. Dynamically changes sound based on forward facing or upward facing orientation Watch for: Calls itself splash resistant and has no official water rating. App is buggy. A bit expensive. Has reliability issues more often than any other speaker
What the Ultimate Ears Boom 3 offers: Rich and warm bass without muddying mix, crisp highs, excellent 15-hour battery life, stable Bluetooth connectivity, IP67 rated and floats, rugged fabric shell, can pair up to 150 speakers via PartyUp Watch for: Not stereo, barely any bass, recessed treble. You can tell from the micro USB that they are just feeding you the same crap hardware over and over, this is inexcusable for a product released in 2021. Lots of mentions of failing batteries on amazon. Not technically a 360 speaker, only front and rear.
Buy the Minirig 4 if sound quality is the priority over the price, or the Ultimate Ears Boom 3 if the price is the priority over sound quality.
Battery life favors the Minirig 4: rated for 30 hours against 15 hours for the Ultimate Ears Boom 3.
There is a real gap in water resistance: the Ultimate Ears Boom 3 at IP67 (brief submersion) against the Minirig 4, which has Splash resistant (splashing).
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Minirig 4 | Ultimate Ears Boom 3 | |
|---|---|---|
| Price | $229.95 | $149.99 |
| Ranked | #6 of 142 in Medium Size Portable Bluetooth Speakers | #92 of 142 in Medium Size Portable Bluetooth Speakers |
| App | Yes | - |
| Aux Input | Yes | - |
| Aux Latency | 0ms | - |
| Bass Extension (-10dB) | 56Hz | 91Hz |
| Battery Life | 30 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| 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) |
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Prices on this page were last checked September 16, 2026 at 12:41 AM 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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The Two Speakers In Full
Minirig 4: $229.95 Amazon eBay
Pros: Modular, can easily attach a subwoofer. Finally USB-C charging. Dynamically changes sound based on forward facing or upward facing orientation. Measured bass extension of 56Hz (-10dB).
Cons: Calls itself splash resistant and has no official water rating. App is buggy. A bit expensive. Has reliability issues more often than any other speaker
Full Minirig 4 review and specifications →
| Amplifier Power | 50W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Aux Latency | 0ms |
| Bass Extension (-10dB) | 56Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth Codecs | AAC, SBC |
| Bluetooth Latency | 60ms |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 4" x 2.9" (101.6 x 73 mm) (diameter x height) |
| Drivers | 70mm custom driver |
| EQ | Yes |
| Frequency Response | 60Hz - 18kHz (Manufacturer specified) |
| IP Rating | Splash resistant |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) |
| Omnidirectional | Pointing up |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes (Bluetooth or cable) |
| Weight | 1.2 lbs (550 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Ultimate Ears Boom 3: $149.99 Amazon eBay
Pros: Rich and warm bass without muddying mix, crisp highs, excellent 15-hour battery life, stable Bluetooth connectivity, IP67 rated and floats, rugged fabric shell, can pair up to 150 speakers via PartyUp. Measured bass extension of 91Hz (-10dB).
Cons: Not stereo, barely any bass, recessed treble. You can tell from the micro USB that they are just feeding you the same crap hardware over and over, this is inexcusable for a product released in 2021. Lots of mentions of failing batteries on amazon. Not technically a 360 speaker, only front and rear.
Full Ultimate Ears Boom 3 review and specifications →
| Bass Extension (-10dB) | 91Hz |
|---|---|
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2" x 2.9" (184 x 73 mm) |
| Drivers | 2x 2" active drivers + 2x 2" x 4" passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 87dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | Yes (PartyUp up to 50 speakers) |
| Power Input | Micro USB |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.3 lbs (608 g) |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
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