These are not really the same size class, and that is the honest framing here. The Minirig 4 with subwoofer ranks #5 of 120 large speakers by sound quality at $290; the Soundcore Boom 3i ranks #31 of 179 medium speakers by sound quality at $118.99.
The Minirig 4 with subwoofer is the longer-running option. A compact speaker and wireless subwoofer pair with some of the most balanced sound available, a long battery and deep, impactful bass. It is rated for 30 hours of battery against 16 for the Soundcore Boom 3i. It keeps a wired aux input, which the Soundcore Boom 3i lacks. The tradeoff: Not stereo, app is buggy.
The Soundcore Boom 3i is the lighter, tougher choice. A warm, punchy waterproof speaker that sounds great and is a strong value. At 1.7 lbs (783 g) it weighs much less than the Minirig 4 with subwoofer at 3.2 lbs (1.44 kg). It is rated IP68 against Splash resistant for the Minirig 4 with subwoofer. It supports AAC Bluetooth, which the Minirig 4 with subwoofer lacks. The catch: Not quite as good as a JBL Charge 5, doesn’t go quite as loud or sound quite as balanced, but very very close.
Buy the Minirig 4 with subwoofer ($290) for a large speaker; the Soundcore Boom 3i ($118.99) suits a medium speaker instead.
Want more options? Browse the full Portable Bluetooth rankings.
Prices on this page were last checked November 11, 2026 at 3:26 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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Specifications Side By Side
| Minirig 4 with subwoofer | Soundcore Boom 3i | |
|---|---|---|
| Price | $290 | $118.99 |
| Ranked | #5 of 120 in Large Size Portable Bluetooth Speakers | #31 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | No |
| Aux Latency | 0ms | - |
| Battery Life | 30 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| EQ | Yes | Yes |
| IP Rating | Splash resistant | IP68 |
| Bluetooth Latency | 60ms | - |
| Power Bank | Yes (USB-C) | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Pointing up | No |
| TWS | Yes (Bluetooth or cable) | Yes |
| Weight | 3.2 lbs (1.44 kg) | 1.7 lbs (783 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC |
| Built-in Microphone | Yes | Yes |
| Party Mode | No | No |
| Bluetooth Version | 5.0 | 5.3 |
| Dimensions | 4” x 2.9” (101.6 x 73 mm) (diameter x height) | 8.3” x 3.3” x 3.1” (210 x 85 x 78.5 mm) |
| Drivers | 70mm custom driver | 94mm woofer + tweeter |
| Frequency Response | 60Hz - 18kHz (Manufacturer specified) | - |
| Amplifier Power | 50W | 50W |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | 56Hz |
| Lights | - | Yes |
| Strap | - | Yes (detachable strap) |
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