Short answer: the Minirig 4, it improves on nearly everything except battery life. The Minirig 4 ranks #9 and the Minirig 2 ranks #7 out of 179 medium portable speakers, for $89.95 more.
Both speakers share Minirig’s modular design, built around the same 70mm driver format and able to attach a Minirig subwoofer for more bass. Where they differ is power and connectivity: the Minirig 4 puts out 50W against the Minirig 2’s 15W, hits 106dB max volume versus 95dB, and adds a built-in microphone and orientation-aware sound that adjusts depending on whether it’s sitting upright or lying flat. The Minirig 4 also finally moved to USB-C charging in place of the Minirig 2’s proprietary cable, and its Bluetooth latency is much lower at 60ms versus 150ms for a single Minirig 2 (500ms when two are paired in stereo).
The tradeoff is battery life: the Minirig 2 is rated for 40 hours against 30 hours for the Minirig 4. Neither speaker has an official water rating despite both being marketed as splash resistant, and both share a documented history of reliability complaints, including a buggy companion app; the Minirig 2’s TWS pairing is specifically called out as buggy as well, an issue the Minirig 4 doesn’t share in its own review.
Buy the Minirig 4 for the far higher output, USB-C charging, and built-in microphone, especially since it’s the speaker still in current production.
Buy the Minirig 2 used only if you find one substantially discounted and want the longer battery life, understanding it carries the same reliability concerns as the current model.
Want more options? Browse the full Portable Bluetooth rankings.
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Specifications Side By Side
| Minirig 2 | Minirig 4 | |
|---|---|---|
| Price | $140 Discontinued | $229.95 |
| Ranked | #9 of 179 in Medium Size Portable Bluetooth Speakers | #7 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | Yes |
| Aux Latency | 0ms | 0ms |
| Bass Extension (-10dB) | 54Hz | 56Hz |
| Battery Life | 40 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Built-in Microphone | No | Yes |
| EQ | Yes | Yes |
| IP Rating | Splash resistant | Splash resistant |
| Maximum SPL | 95dB (measured by Alan Ross Reviews) | 106dB (measured by Alan Ross Reviews) |
| Power Bank | No | Yes (USB-C) |
| Power Input | Proprietary USB cable | USB-C |
| Stereo | No | No |
| Omnidirectional | Pointing up | Pointing up |
| TWS | Yes (cable) | Yes (Bluetooth or cable) |
| Weight | 1.1 lbs (488 g) | 1.2 lbs (550 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | aptX | AAC, SBC |
| Bluetooth Latency | 150ms (1 speaker) / 500ms (2 speakers stereo) | 60ms |
| Bluetooth Version | 4.2 | 5.0 |
| Drivers | 70mm speaker driver | 70mm custom driver |
| Amplifier Power | 15W | 50W |
| Dimensions | 4” x 3” (102 x 76 mm) (diameter x height) | 4” x 2.9” (101.6 x 73 mm) (diameter x height) |
| Digital Aux Input | No | No |
| Frequency Response | - | 60Hz - 18kHz (Manufacturer specified) |
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