Short answer: the Minirig 4 for better sound quality, the Ultimate Ears Boom 4 for the lower price. The Minirig 4 ranks #6 of 142 medium speakers at $229.95. The Ultimate Ears Boom 4 ranks #91 at $109.99, $119.96 cheaper.
What the Ultimate Ears Boom 4 offers: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app. Watch for: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%
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
Buy the Ultimate Ears Boom 4 when the price outweighs sound quality for you, and the Minirig 4 when sound quality outweighs the price instead.
There is a real battery-life gap here: the Minirig 4 is rated for 30 hours, the Ultimate Ears Boom 4 only 15 hours.
Water resistance is not close: the Ultimate Ears Boom 4 is rated at IP67 (brief submersion), well ahead of the Minirig 4 at Splash resistant (splashing).
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Ultimate Ears Boom 4 | Minirig 4 | |
|---|---|---|
| Price | $109.99 | $229.95 |
| Ranked | #91 of 142 in Medium Size Portable Bluetooth Speakers | #6 of 142 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 15 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| IP Rating | IP67 | Splash resistant |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | Pointing up |
| Weight | 1.4 lbs (620 g) | 1.2 lbs (550 g) |
| Bluetooth Version | 5.1 | 5.0 |
| Dimensions | 7.2" x 2.9" x 2.9" (184 x 73 x 73 mm) | 4" x 2.9" (101.6 x 73 mm) (diameter x height) |
| Drivers | 2x 1.57" (40mm) active drivers + 2x 1.81" x 2.57" (46.1 x 65.2mm) passive radiators | 70mm custom driver |
| TWS | Yes | Yes (Bluetooth or cable) |
| EQ | Yes (via app) | Yes |
| Built-in Microphone | No | Yes |
| Power Bank | No | Yes (USB-C) |
| Aux Input | No | Yes |
| Maximum SPL | 85dBC (Manufacturer specified) | 106dB (measured by Alan Ross Reviews) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | AAC, SBC |
| Aux Latency | - | 0ms |
| Bass Extension (-10dB) | - | 56Hz |
| Bluetooth Latency | - | 60ms |
| Frequency Response | - | 60Hz - 18kHz (Manufacturer specified) |
| Amplifier Power | - | 50W |
Related Speaker Comparisons
How Minirig 4 compares with other leading options:
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- Minirig 4 vs Soundcore Motion 300
- Minirig 4 vs Soundcore Motion+
- Minirig 4 vs Soundcore Boost “upgraded” 2021
- Denon Envaya DSB-250BT vs Minirig 4
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
Ultimate Ears Boom 4: $109.99 Amazon eBay
Pros: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app.
Cons: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%
Full Ultimate Ears Boom 4 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2" x 2.9" x 2.9" (184 x 73 x 73 mm) |
| Drivers | 2x 1.57" (40mm) active drivers + 2x 1.81" x 2.57" (46.1 x 65.2mm) passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 85dBC (Manufacturer specified) |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.4 lbs (620 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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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