These are not really the same size class, and that is the honest framing here. The Minirig 4 with subwoofer ranks #5 of 82 large speakers by sound quality at $290; the Soundcore Boom 3i ranks #29 of 144 medium speakers by sound quality at $118.99.
Why pick the Minirig 4 with subwoofer: Very balanced sound. The catch: Not stereo, app is buggy.
The case for the Soundcore Boom 3i: Looks to be designed as a direct competitor to the Charge 5 with a very similar sound profile, warm tuned with boosted bass. The tradeoff: Not quite as good as a 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.
If battery life is a priority, the Minirig 4 with subwoofer is rated for 30 hours versus 16 hours for the Soundcore Boom 3i.
There is a real gap in water resistance: the Soundcore Boom 3i at IP68 (extended submersion) against the Minirig 4 with subwoofer, which has Splash resistant (splashing).
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Minirig 4 with subwoofer | Soundcore Boom 3i | |
|---|---|---|
| Price | $290 | $118.99 |
| Ranked | #5 of 82 in Large Size Portable Bluetooth Speakers | #29 of 144 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 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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Prices on this page were last checked September 26, 2026 at 11:14 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 4 with subwoofer: $290 Minirigs eBay
Older model: the Minirig 2 with subwoofer (rated 4.5/5).
Pros: Very balanced sound. Finally USB-C charging. Deeper, more impactful bass than the old Sub 3. Subwoofer pairs wirelessly and can be placed anywhere in the room for extra bass. Fine-grained tuning via the app - 5-band EQ plus separate bass/treble and subwoofer controls. Sounded more accurate than the JBL Xtreme 5 in a side-by-side comparison, and the whole 2.1 setup is smaller and lighter than it.
Cons: Not stereo, app is buggy. Not easy to carry on the go, no handle and there’s 2 pieces. Calls itself splash resistant but has no official water rating. A bit expensive. Has reliability issues more often than any other speaker. Default out-of-the-box tuning sounds off and needs a custom EQ to sound its best.
Full Minirig 4 with subwoofer review and specifications →
| Amplifier Power | 50W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Aux Latency | 0ms |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth Codecs | 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 |
| Omnidirectional | Pointing up |
| Party Mode | No |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes (Bluetooth or cable) |
| Weight | 3.2 lbs (1.44 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: Minirigs 4 with Sub 4 vs JBL Xtreme 5 - 1st impressions More from Oluv’Sone →
- Alan Ross Reviews: Minirig 2.1 or the Brane X or the Harman Kardon Go Play 3? More from alanrossreviews →
- Alan Ross Reviews: Game changer! Minirig wireless portable subwoofer mk4 goes boom!
- 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)
- Alan Ross Reviews: A true story: Minirigs 4 with Sub 4 vs JBL Xtreme 5 - 1st impressions
- Head-to-Head Comparisons
- Minirig 4 with subwoofer vs Brane X
- Minirig 4 with subwoofer vs Minirig 3 with subwoofer
- Minirig 4 with subwoofer vs Tribit Stormbox Lava
- Minirig 4 with subwoofer vs Minirig 2 with subwoofer
- Minirig 4 with subwoofer vs JBL Xtreme 5
- Minirig 4 with subwoofer vs Vifa Helsinki
- Minirig 4 with subwoofer vs Soundcore Boom 2
- Minirig 4 with subwoofer vs Marshall Stockwell II
- See all 49 comparisons
Soundcore Boom 3i: $118.99 Amazon B&H Photo Video eBay
Pros: Looks to be designed as a direct competitor to the Charge 5 with a very similar sound profile, warm tuned with boosted bass. Better value for the money than the Charge 5. Measured bass extension of 56Hz (-10dB).
Cons: Not quite as good as a Charge 5, doesn’t go quite as loud or sound quite as balanced, but very very close. An earlier firmware version had some bass distortion, update your firmware in the Soundcore App
Full Soundcore Boom 3i review and specifications →
| Amplifier Power | 50W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 56Hz |
| Battery Life | 16 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 8.3” x 3.3” x 3.1” (210 x 85 x 78.5 mm) |
| Drivers | 94mm woofer + tweeter |
| EQ | Yes |
| IP Rating | IP68 |
| Lights | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (detachable strap) |
| TWS | Yes |
| Weight | 1.7 lbs (783 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Soundcore Boom 3i vs JBL Charge 5
- Soundcore Boom 3i vs JBL Charge 5 Wifi
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- Soundcore Boom 3i vs Teufel Rockster XS
- Soundcore Boom 3i vs Bogasing G4
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- See all 116 comparisons