Short answer: the Ultimate Ears Megaboom 4, if you are buying new. The Minirig 3 ranks higher than it (#8 vs #159 of 164 medium speakers, 4.3/5 vs 2.1/5) but is discontinued, so only consider it used; the Ultimate Ears Megaboom 4 is still sold new at $200.
The Minirig 3 is the better-sounding, longer-running pick. Modular, can easily attach a subwoofer. It is rated for 30 hours of battery against 20 for the Ultimate Ears Megaboom 4. At 1.2 lbs (550 g) it weighs much less than the Ultimate Ears Megaboom 4 at 2.4 lbs (1.1 kg). It supports aptX Bluetooth, which the Ultimate Ears Megaboom 4 lacks. The catch: Calls itself splash resistant and has no official water rating.
The Ultimate Ears Megaboom 4 is the tougher pick. IP67 rated, floats, and finally uses USB-C charging. It is rated IP67 against Splash resistant for the Minirig 3. The catch: A lot of distortion at higher volumes.
Buy the Ultimate Ears Megaboom 4 if you want one new; the Minirig 3 is discontinued, so only look for it used.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Minirig 3 | Ultimate Ears Megaboom 4 | |
|---|---|---|
| Price | $140 Discontinued | $200 |
| Ranked | #8 of 164 in Medium Size Portable Bluetooth Speakers | #159 of 164 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | No |
| Aux Latency | 0ms | - |
| Bass Extension (-10dB) | 53Hz | - |
| Battery Life | 30 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | aptX, AAC, SBC | SBC |
| Built-in Microphone | No | No |
| EQ | Yes | Yes (via app) |
| IP Rating | Splash resistant | IP67 |
| Bluetooth Latency | 60ms | - |
| Maximum SPL | 105dB (measured by Alan Ross Reviews) | 91dB (Manufacturer specified) |
| Power Bank | No | - |
| Power Input | Proprietary USB cable | USB-C |
| Stereo | No | No |
| Omnidirectional | Pointing up | Yes |
| TWS | Yes (Bluetooth or cable) | Yes |
| Weight | 1.2 lbs (550 g) | 2.4 lbs (1.1 kg) |
| Bluetooth Version | 5.0 | 5.1 |
| Dimensions | 4” x 2.9” (101.6 x 73 mm) (diameter x height) | 3.4” x 3.4” x 8.9” (87 x 87 x 225 mm) |
| Drivers | 70mm custom driver | 2x 50x50mm full-range + 2x 55x86mm passive radiators |
| Frequency Response | 60Hz - 18kHz (Manufacturer specified) | - |
| Amplifier Power | 40W | - |
| Digital Aux Input | No | No |
| Party Mode | - | Yes (PartyUp up to 50 speakers) |
| Strap | - | Yes (built-in loop) |
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Prices on this page were last checked October 4, 2026 at 9:58 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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The Two Speakers In Full
Minirig 3: $140 Discontinued eBay
Newer model: the Minirig 4, ranked higher, rated 4.3/5.
Pros: Modular, can easily attach a subwoofer. Measured bass extension of 53Hz (-10dB).
Cons: Not stereo. Calls itself splash resistant and has no official water rating. App is buggy. Wireless TWS pairing is buggy. A bit expensive. Has reliability issues more often than any other speaker. Discontinued; Minirig now sells only the Minirig 4, and the old product page redirects to it.
Full Minirig 3 review and specifications →
| Amplifier Power | 40W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Aux Latency | 0ms |
| Bass Extension (-10dB) | 53Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | aptX, AAC, SBC |
| Bluetooth Latency | 60ms |
| Bluetooth Version | 5.0 |
| Built-in Microphone | No |
| 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 | 105dB (measured by Alan Ross Reviews) |
| Omnidirectional | Pointing up |
| Power Bank | No |
| Power Input | Proprietary USB cable |
| Stereo | No |
| TWS | Yes (Bluetooth or cable) |
| Weight | 1.2 lbs (550 g) |
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: B&O Beoplay A1 2nd gen vs Minirig mk3 bluetooth speaker More from alanrossreviews →
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- Alan Ross Reviews: Minirig 4 vs Minirig 3, stuff they tell you, stuff they don’t! 😂
- Beautiful Zar DJ: MINIRIG 4 Vs MINIRIG 3 (50-100%Volume Audio Test)
- James from Canada: SOUND TESTS - Soundboks, Minirig 3, dB Technologies, Bose S1 Pro, etc - RAVE TEST
- Head-to-Head Comparisons
Ultimate Ears Megaboom 4: $200 Amazon eBay
Older model: the Ultimate Ears Megaboom 3 (ranked higher, rated 3/5).
Pros: IP67 rated, floats, and finally uses USB-C charging. 20 hour battery life. ‘PartyUp’ feature syncs multiple UE speakers together.
Cons: A lot of distortion at higher volumes. Rolled off treble. Not very loud. They really screwed this up
Full Ultimate Ears Megaboom 4 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 3.4” x 3.4” x 8.9” (87 x 87 x 225 mm) |
| Drivers | 2x 50x50mm full-range + 2x 55x86mm passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 91dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | Yes (PartyUp up to 50 speakers) |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 2.4 lbs (1.1 kg) |
- Links
- Reviews, Comparisons and Sound Samples
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